Itcdeductions

Having moved from gross income to "income" by subtracting exemptions, the taxpayer reaches the third stage of the funnel: deductions. The master provision is Section 15 of the Income Tax Act [Chapter 23:06]. Section 15(1) opens the gate — "for the purpose of determining the taxable income of any person, there shall be deducted from the income of such person the amounts allowed to be deducted in terms of this section." The amounts themselves are listed in Section 15(2), paragraphs (a) to (z). This lesson is about the general deduction in Section 15(2)(a) — the workhorse provision under which most ordinary business expenses are claimed. The specific, named deductions in paragraphs (b)–(z) are treated in the companion lesson on Specific Allowable Deductions, and the things that may never be deducted are in the lesson on Prohibited Deductions (Section 16).

The general deduction formula in Section 15(2)(a) allows "expenditure and losses to the extent to which they are incurred for the purposes of trade or in the production of the income," subject to two exceptions: (i) they must not be of a capital nature, and (ii) prepayments for goods, services or benefits used up in a later year are spread proportionately over the years in which they are used up (inserted by the Finance Act 1/2018). This is Zimbabwe's counterpart to the well-known "general deduction formula", but note a key feature: the positive test is disjunctive — expenditure qualifies if it is incurred either "for the purposes of trade" or "in the production of the income." That is broader than a pure production-of-income test, and the term "trade" is itself defined expansively in Section 2 to include "any profession, trade, business, activity, calling, occupation or venture, including the letting of any property."

Five elements must each be satisfied and each is a frequent battleground: "expenditure and losses" (an actual outlay or an involuntary loss, not a mere provision or notional cost); "incurred" (an unconditional legal liability has arisen, not merely anticipated); "to the extent to which" (apportionment where an outlay serves mixed purposes); "for the purposes of trade or in the production of the income" (the purpose/causation test); and "not of a capital nature" (the same capital/revenue boundary studied in Capital vs Revenue Receipts, now applied on the expenditure side). The Zimbabwean case law annotated to Section 15(2)(a) is extensive — for example Delta Beverages 22-SC-003 and SW (Pvt) Ltd v ZIMRA 19-HH-499 on the production-of-income link, A Bank Ltd v ZIMRA 20-HH-270 on capital-nature computer expenditure (and the ring-fencing rule), NOC (Pvt) Ltd v ZIMRA 19-HH-765 on the impropriety of splitting a single payment into deductible and non-deductible parts, M (Pvt) Ltd v ZIMRA 15-HH-665 (losses from theft by controlling directors not deductible), G Bank v ZIMRA 15-HH-207 (staff retrenchment costs), Unki Mine v ZIMRA 22-SC-015 (donations to preserve the income-earning structure), and L v COT 91-HH-001 (a lawyer's eye operation disallowed as not in the production of income).

Section 15 also contains the ring-fencing provisos in Section 15(1): deductions for income from trade and investment versus employment must be claimed against the income to which they relate (proviso (b)), and mining income is ring-fenced from other trade (proviso (c)) — the conjunctive drafting examined in A Bank Ltd v ZIMRA 20-HH-270. Finally, where deductions exceed income the result is an assessed loss, defined in Section 2 (and which, by its proviso, cannot be created out of employment income). Section 15(3) allows an assessed loss to be carried forward, earliest year first, but no part first determined more than six years before may be deducted — except an assessed loss from mining operations, which has no time limit. The carry-forward is forfeited on insolvency and is denied where a change of shareholding was effected solely or mainly to traffic in the loss. Section 15(4) prevents the same amount being deducted twice under different provisions.

This lesson assumes the funnel from Income Tax Foundations and the capital/revenue analysis from Capital vs Revenue Receipts, and it sets up Specific Allowable Deductions, Capital Allowances (which provide the statutory route for the capital expenditure that Section 15(2)(a)(i) excludes), and Prohibited Deductions.

The income tax computation is a funnel (established in Income Tax Foundations): gross income, less exemptions, gives "income"; income, less deductions, gives "taxable income"; taxable income times the Finance Act rate, less credits, gives the tax. Deductions are the third stage, and Section 15 is the gateway. The definition of "taxable income" in Section 8(1) confirms the mechanics: "the amount remaining after deducting from the income of any person all the amounts allowed to be deducted from income under this Act."

Two structural points frame everything that follows.

First, deductions are a creature of statute, not of accounting. A cost that a company expenses in its financial statements is not automatically deductible for tax; it is deductible only if it fits a provision of Section 15(2) and survives Section 16. The accounting treatment is evidence, not the answer. This is why the general deduction in Section 15(2)(a) matters so much — it is the provision under which the great mass of ordinary, recurrent business expenses (rent, salaries, raw materials, utilities, repairs, advertising, finance costs on trading account) are actually claimed.

Second, the architecture is positive then negative. Section 15(2) tells you what may be deducted (the positive limbs); Section 16 ("Cases in which no deduction shall be made") tells you what may not be, overriding the positive list "save as is otherwise expressly provided" (see Prohibited Deductions). A deduction must therefore clear both hurdles: it must fall within Section 15(2)(a) (or another paragraph), and it must not be caught by Section 16. The two lessons are read together.

Where does the general formula sit relative to the specific deductions? Paragraphs (b)–(z) of Section 15(2) provide named, often more generous or more precisely engineered deductions — repairs (b), capital allowances (c), (e), (f), approved fund contributions, double deductions for export market development, and so on (see Specific Allowable Deductions). The general formula in (a) is the residual, all-purpose provision for expenditure that has no special home. Frequently an expense could in principle be argued under (a) or under a specific paragraph; Section 15(4) ensures it is not counted twice.

ZIMRA audit interest concentrates on three questions under the general formula: is the outlay capital (and therefore excluded by (a)(i), recoverable, if at all, only through capital allowances)? Is it sufficiently connected to the trade or the production of income (purpose/causation)? And has the right portion been claimed where the outlay serves mixed business and non-business purposes ("to the extent to which")?

B.1 Section 15(1) — the opening words and the ring-fencing provisos

Section 15(1) directs that, in determining taxable income, "there shall be deducted from the income … the amounts allowed to be deducted in terms of this section." It then carries three provisos (substituted by Act 18/2000):

• Proviso (a) — currency variation. Where, owing to an exchange-rate variation between Zimbabwe and another country, the amount actually paid in Zimbabwean currency differs from the liability incurred, the amount deducted is the amount actually paid; if liability and payment fall in different years, the increase/reduction is given effect in the year of payment.
• Proviso (b) — trade/investment vs employment ring-fence. Where a person earns income from trade and investment and income from employment, deductions "shall only be claimed in respect of the income to which they relate." You cannot offset trade expenses against employment income, or vice versa. The conjunctive "and" in this drafting was examined in A Bank Ltd v ZIMRA 20-HH-270.
• Proviso (c) — mining vs other trade ring-fence. Where a person earns income from mining operations and income from other trade and investment, deductions are claimed only against the income to which they relate. Mining is ring-fenced (consistent with the special mining-deduction code in the Fifth Schedule).

B.2 Section 15(2)(a) — the general deduction formula

Section 15(2)(a) (substituted by the Finance Act 1/2018 w.e.f. the 2018 year of assessment) allows:

"expenditure and losses to the extent to which they are incurred for the purposes of trade or in the production of the income — except — (i) to the extent to which they are expenditure or losses of a capital nature; (ii) expenditure that constitutes prepayment for goods, services or benefits that will be used up in any subsequent year of assessment (in which event the expenditure will be allowed proportionately over the years in which the goods, services or benefits are used up)."

This single sentence contains the positive test (incurred for the purposes of trade or in the production of income), the apportionment qualifier ("to the extent to which"), and the two negative limbs (capital nature; prepayments).

A vital companion definition is "trade" in Section 2: it "includes any profession, trade, business, activity, calling, occupation or venture, including the letting of any property, carried on, engaged in or followed for the purposes of producing income … and anything done for the purpose of producing such income." The breadth of "trade" widens the first positive limb considerably (the letting of property, for instance, is expressly a trade).

B.3 Section 15(2)(b)–(z) — the specific deductions (signposted)

Paragraphs (b) onward provide the named deductions: (b) repairs to trade articles/property and repairs from letting (annotated with ZIMRA v Stanbic 19-SC-013 and FF v COT 77-ITC-1263); (c), (e), (f) the capital allowances (commercial/industrial buildings, farm improvements, plant and machinery — see Capital Allowances); and the many further paragraphs covering approved pension/benefit-fund contributions, bad debts, experimental and research expenditure, export-market-development double deductions, and the farming and mining schedules. These are the subject of the Specific Allowable Deductions lesson and are not re-taught here; this lesson is the general formula.

B.4 The "assessed loss" definition (Section 2) and Section 15(3) carry-forward

"Assessed loss" (Section 2) means "any amount by which the sum of the deductions to be made under Part III … from the income … of any taxpayer exceeds such income," with a crucial proviso: "no amount received … under a contract of employment shall be taken into account for the purpose of determining his assessed loss." Employment income is therefore walled off — you cannot generate or augment an assessed loss against your salary.

Section 15(3) allows a carry-forward: from the income remaining after the Section 15(2), 17 and 18 deductions, "there shall be deducted any assessed loss determined in respect of the previous year of assessment." Its provisos are essential:

• (i) Insolvency forfeiture — a taxpayer adjudged insolvent or who assigns his estate for creditors cannot carry forward a loss incurred before that event.
• (ii) Loss-trafficking — if the shareholding of a company with an assessed loss (or of a company controlling it) changes, and the Commissioner is satisfied the change was effected solely or mainly to take advantage of the loss, the pre-change loss is not deductible. Control = majority of voting rights held directly or indirectly.
• (iii) Old-company/new-company continuity — preserves the loss where a foreign-incorporated company carrying on its principal business in Zimbabwe is wound up to transfer its whole business to a new company acquiring it.
• (iv) FIFO ordering and the six-year cap — losses are deducted earliest year first until exhausted or income runs out; and "except in the case of an assessed loss … arising from mining operations, no part of an assessed loss shall be deducted which was first determined in respect of a year of assessment more than 6 years before" the year of deduction. Mining losses have no time limit; all others expire after six years.
• (v) Conversion continuity — a company⇄private business corporation conversion preserves the loss if not done mainly to traffic in it.
• (vi) Multi-location mining — a miner with operations in more than one location must submit a Commissioner-approved breakdown of the loss by location.

B.5 Section 15(4) — no double deduction

Section 15(4) provides that where an amount would be deductible under more than one provision, the taxpayer may not deduct it more than once. A single outlay yields a single deduction, whichever provision is used.

C.1 "Expenditure and losses" — what counts

The positive limb covers two things. "Expenditure" is a voluntary outlay — money paid or a liability incurred in the course of the trade (wages, rent, purchases, interest on trading finance). "Losses" are involuntary diminutions of trading assets suffered in the course of the trade (e.g. trading stock destroyed, ordinary bad trade debts written off where not otherwise provided for). The inclusion of "losses" is what allows a genuine trading loss — as opposed to an expense — to be deducted under the general formula.

Two boundaries: a mere provision or reserve (an accounting estimate of a future liability) is not "expenditure … incurred"; and a notional cost (e.g. interest the business could have earned on its own capital) is not expenditure at all (compare Section 16(1)(h), which disallows notional interest on capital). The losses from theft by directors or others in control of the business were held not deductible in M (Pvt) Ltd v ZIMRA 15-HH-665 — such losses are not incurred in the ordinary income-earning operations but flow from those controlling the business.

C.2 "Incurred" — an unconditional liability, and timing

To be deducted in a year, expenditure must have been "incurred" in that year — meaning the taxpayer has come under an unconditional legal obligation to pay, even if payment itself is later. Anticipated or contingent costs are not yet incurred. The prepayment rule in Section 15(2)(a)(ii) is a deliberate timing override: where you pay in advance for goods/services/benefits that will be used up in a later year, the deduction is spread proportionately over the years of use, not claimed up front. Example: a US$24,000 insurance premium paid on 1 October 2025 covering 12 months to 30 September 2026 is apportioned — US$6,000 (Oct–Dec 2025) deductible in YA 2025 and US$18,000 in YA 2026. This rule (Finance Act 1/2018) reversed the former practice of full up-front deduction.

C.3 "To the extent to which" — apportionment of mixed-purpose outlays

The words "to the extent to which" appear in both the positive limb and the capital exception. They authorise — indeed require — apportionment where an outlay serves mixed purposes (part trade, part private; part revenue, part capital). You deduct the trade/revenue portion and disallow the rest. Example: a sole trader's vehicle used 70% for business and 30% privately yields a 70% deduction of running costs. But apportionment must be principled: in NOC (Pvt) Ltd v ZIMRA 19-HH-765 the court held it improper to split a single payment artificially into deductible and non-deductible segments where the expenditure was, in truth, a single indivisible outlay of one character. Apportionment applies to genuinely divisible mixed-purpose costs, not to manufacturing deductibility out of a single non-deductible payment.

C.4 "For the purposes of trade or in the production of the income" — the purpose/causation test

This is the heart of the general formula, and note again it is disjunctive — either limb suffices.

• "For the purposes of trade" — incurred to enable, advance or protect the trade. Because "trade" is defined so broadly (any business, profession, activity, calling, occupation, venture, or the letting of property), this limb is wide. Unki Mine v ZIMRA 22-SC-015 allowed donations made to preserve the appellant's income-earning structure — expenditure for the purposes of the trade even though not directly producing a receipt.
• "In the production of the income" — the outlay must be causally linked to the earning of income: incurred in the operations by which income is produced, and closely enough connected to that income-earning activity. SW (Pvt) Ltd v ZIMRA 19-HH-499 and Delta Beverages 22-SC-003 are annotated to this limb. By contrast, L v COT 91-HH-001 disallowed a lawyer's eye operation — a personal/medical cost not incurred in the production of his professional income (it restored the man, not the income-earning operations). G Bank v ZIMRA 15-HH-207 addressed staff retrenchment costs, and Deb (Pvt) Ltd v ZIMRA 19-HH-664 the matching of expenses to the income they produce.

The purpose is judged by the closeness and purpose of the connection to the trade or income, objectively assessed from the facts, not merely the taxpayer's say-so (onus rests on the taxpayer under Section 63). Personal, domestic and capital purposes fall outside (and several are separately barred by Section 16).

C.5 "Not of a capital nature" — the capital/revenue line on the expenditure side

Section 15(2)(a)(i) excludes "expenditure or losses of a capital nature." This applies, on the expenditure side, the very same capital/revenue distinction studied (on the receipt side) in Capital vs Revenue Receipts. The classic indicators recur: expenditure that brings into existence an asset or advantage of enduring benefit, or that strengthens the income-earning structure (the "tree"), is capital; expenditure that is part of the income-earning operations (the "fruit") is revenue. A Bank Ltd v ZIMRA 20-HH-270 treated certain computer expenditure as capital (and is also authority on the ring-fencing provisos). Capital expenditure excluded here is not lost — it is the gateway to the capital allowances in Section 15(2)(c)/(e)/(f) and the Fourth Schedule (see Capital Allowances). The two systems are complementary: revenue expense → general deduction; capital expense → capital allowance.

C.6 The ring-fencing provisos — keeping baskets separate

Section 15(1)(b) and (c) prevent cross-subsidy between income baskets. Employment income is kept separate from trade/investment income; mining is kept separate from other trade. The practical effect is that a loss in one basket cannot be set against income in another in the same year, and — reinforced by the assessed-loss definition's employment proviso — an employee cannot create an assessed loss to shelter salary. A Bank Ltd v ZIMRA 20-HH-270 turns on the deliberate conjunctive drafting that produces this ring-fencing.

C.7 Assessed losses and the six-year clock

When deductions exceed income, the excess is an assessed loss (Section 2), carried forward under Section 15(3). Hold four points:

1. Employment income is excluded from the assessed-loss computation — you cannot bank a loss against salary.
2. Losses are used earliest first (FIFO) and expire six years after the year in which they were first determined — except mining losses, which never expire.
3. The carry-forward is forfeited on insolvency and denied on loss-trafficking (shareholding changes engineered mainly to use the loss).
4. Section 15(4) bars deducting the same amount twice — relevant where an expense might qualify under both the general formula and a specific paragraph.

D.1 Individuals (employees and sole traders)

Scenario 1 — the employee who cannot deduct. Tariro is employed and pays for her own professional subscriptions and home internet. Under the ring-fencing proviso (Section 15(1)(b)) and the assessed-loss employment proviso, deductions are claimed only against the income to which they relate; an employee generally has no "income from trade" to deduct against, and cannot create an assessed loss against salary. Most employment costs are therefore non-deductible (relief comes, if at all, through specific provisions and credits, not the general formula).

Scenario 2 — the sole trader's mixed-use vehicle. Blessing runs a delivery business and uses his vehicle 80% for the business, 20% privately. Running costs of US$10,000 are deductible to the extent of US$8,000 (80%) under Section 15(2)(a); the US$2,000 private portion is disallowed (and the home-to-work element would in any event be barred by Section 16). The purchase price of the vehicle is capital (Section 15(2)(a)(i)) — recovered, if at all, through capital allowances, subject to the passenger-vehicle cap in Section 16.

Scenario 3 — prepayment. Blessing pays a US$12,000 annual licence on 1 July 2025 covering 12 months. Under Section 15(2)(a)(ii) the deduction is apportioned: US$6,000 in YA 2025 (Jul–Dec) and US$6,000 in YA 2026.

D.2 SMEs and partnerships

Scenario 4 — bad trade debt vs theft loss. Madziva Traders writes off a US$4,000 genuine trade debt and also loses US$6,000 stolen by a director. The trade-debt loss is deductible (a loss in the production of income — though often claimed under the specific bad-debt paragraph). The director-theft loss is not deductible (M (Pvt) Ltd v ZIMRA 15-HH-665 — losses from theft by those controlling the business fall outside the income-earning operations).

Scenario 5 — repairs vs improvements. The SME spends US$5,000 repairing a delivery truck and US$20,000 replacing the engine with a more powerful one that upgrades the vehicle. The US$5,000 repair is a revenue expense (deductible under Section 15(2)(b)/(a)); the US$20,000 upgrade is capital (an enduring improvement, not a mere restoration) — excluded by Section 15(2)(a)(i) and recovered, if at all, through capital allowances.

Scenario 6 — assessed loss carry-forward. In YA 2024 Madziva Traders has an assessed loss of US$30,000; in YA 2025 it makes US$18,000 of income. It deducts the loss, reducing taxable income to nil, and carries forward the US$12,000 balance — which remains available until six years after YA 2024 (so up to YA 2030), after which any unused part expires.

D.3 Large corporates and multinationals

Scenario 7 — donations to protect the structure. Unki-type Co makes community donations to maintain its social licence to operate and protect its income-earning structure. Following Unki Mine v ZIMRA 22-SC-015, such donations can qualify under the "for the purposes of trade" limb of Section 15(2)(a) — even though they do not directly produce a receipt — provided they genuinely preserve the income-earning structure (and are not caught by a Section 16 prohibition or the charitable-donation limits).

Scenario 8 — capital computer system. A corporate spends US$400,000 on a new core IT system. Following A Bank Ltd v ZIMRA 20-HH-270, such expenditure is capital and excluded by Section 15(2)(a)(i); it is recovered through capital allowances (Fourth Schedule), not as a general deduction. Routine software maintenance and licence fees, by contrast, are revenue.

Scenario 9 — loss-trafficking blocked. A profitable group buys a dormant company carrying a US$2 million assessed loss, intending to inject profits and absorb them against the loss. Under Section 15(3) proviso (ii), the Commissioner, satisfied the change of shareholding was effected mainly to take advantage of the loss, denies the carry-forward of the pre-change loss. (A mining-loss company would still face the trafficking test, though mining losses otherwise escape the six-year clock.)

The following are annotated in the source Act against Section 15(2)(a) and the assessed-loss provisions. Zimbabwean/Rhodesian decisions guide strongly; any foreign authority is persuasive only.

• Delta Beverages (Pvt) Ltd v ZIMRA 22-SC-003 (Zimbabwe, SC) — annotated to the "production of the income" limb; a leading modern statement on the income/expenditure connection.
• SW (Pvt) Ltd v ZIMRA 19-HH-499 (Zimbabwe) — the production-of-income link for the general deduction.
• A Bank Ltd v ZIMRA 20-HH-270 (Zimbabwe) — computer expenditure of a capital nature excluded by Section 15(2)(a)(i); also authority on the ring-fencing provisos (the conjunctive "and").
• NOC (Pvt) Ltd v ZIMRA 19-HH-765 (Zimbabwe) — it is improper to split a single payment into deductible and non-deductible segments; apportionment must reflect genuine divisibility.
• M (Pvt) Ltd v ZIMRA 15-HH-665 (Zimbabwe) — losses from theft by directors/those in control of the business are not deductible.
• G Bank Ltd v ZIMRA 15-HH-207 (Zimbabwe) — staff retrenchment costs and their deductibility.
• Unki Mine (Pvt) Ltd v ZIMRA 22-SC-015 (Zimbabwe, SC) — donations to preserve the income-earning structure allowed under the "purposes of trade" limb.
• L v COT 91-HH-001 (Zimbabwe) — a lawyer's eye operation disallowed: a personal/medical cost not in the production of income (and barred as private under Section 16).
• GG v COT 76-ITC-1258; 'JA' v COT 92-ITC-1645 — intention to trade (farming; trotting/horse-breeding) — whether an activity is a "trade" producing income at all.
• Deb (Pvt) Ltd v ZIMRA 19-HH-664 (Zimbabwe) — matching of expenses to the income they produce.
• 'T.' Ltd v COT 66-RLR-021 (Rhodesia) — expenditure of a capital nature / producing exempt or foreign income.
• Old Mutual Zimbabwe Ltd v Commissioner-General 16-HH-143 (Zimbabwe) — annotated near the assessed-loss definition; "capital" is not "exempt".

1. Treating the accounting expense as the tax deduction. Deductibility is statutory; a booked cost must fit Section 15(2) and survive Section 16. Provisions, reserves and notional costs are not "expenditure incurred".
2. Deducting capital expenditure under the general formula. Section 15(2)(a)(i) excludes capital outlays; they are recovered (if at all) through capital allowances. Misclassifying an enduring improvement as a "repair" is a classic audit adjustment.
3. Full up-front deduction of prepayments. Since the Finance Act 1/2018, prepayments for goods/services used up later are spread proportionately (Section 15(2)(a)(ii)).
4. Ignoring apportionment ("to the extent to which"). Mixed-purpose outlays must be split; but do not artificially split a single indivisible payment to manufacture a partial deduction (NOC 19-HH-765).
5. Crossing the ring-fences. Trade/investment deductions cannot offset employment income, and mining cannot offset other trade (Section 15(1)(b),(c); A Bank 20-HH-270). Employees cannot create an assessed loss against salary.
6. Claiming personal/medical/domestic costs. A personal cost (e.g. L v COT eye operation) is not in the production of income and is separately barred by Section 16.
7. Mismanaging the assessed loss. Forgetting the six-year expiry (mining excepted), the FIFO order, insolvency forfeiture, or the loss-trafficking denial on a change of control.
8. Double-deducting. Section 15(4) bars claiming the same amount under two provisions (e.g. once under the general formula and again under a specific paragraph).
9. Assuming donations are never deductible. Donations that genuinely preserve the income-earning structure can qualify under the "purposes of trade" limb (Unki Mine 22-SC-015) — though charitable-donation limits and Section 16 still apply.

Work through the questions one at a time. Choose an answer and it is graded immediately, with an explanation and the provision it comes from. Your progress is saved, so you can stop and resume.

• Section 15 is the deduction gateway. The general formula is Section 15(2)(a): "expenditure and losses to the extent to which incurred for the purposes of trade or in the production of the income," except capital outlays and prepayments (spread proportionately, Finance Act 1/2018).
• The positive test is disjunctive ("trade" or "production of income"), and "trade" is defined broadly (Section 2) — making the formula wide.
• Five elements: expenditure/losses; incurred (unconditional liability); to the extent to which (apportionment); purpose/causation; not capital.
• Capital is excluded by 15(2)(a)(i) — but recovered through capital allowances (the two systems are complementary). Repairs (revenue) vs improvements (capital) is a perennial line (A Bank 20-HH-270).
• Prepayments are deducted proportionately over the years of use (15(2)(a)(ii)).
• Apportionment is required for mixed outlays, but a single indivisible payment may not be artificially split (NOC 19-HH-765).
• Purpose/causation: structure-preserving donations can qualify (Unki Mine 22-SC-015); personal/medical costs cannot (L v COT 91-HH-001); director-theft losses cannot (M (Pvt) Ltd 15-HH-665).
• Ring-fencing (15(1)(b),(c)): trade/investment vs employment, and mining vs other trade. Employment income is walled off — no assessed loss against salary.
• Assessed loss (Section 2 + Section 15(3)): carried forward FIFO, expires after six years (mining never), forfeited on insolvency, denied on loss-trafficking (change of control mainly to use the loss).
• Section 15(4): no amount may be deducted twice under different provisions.
• Deductibility is statutory, not accounting — and every general deduction must also survive Section 16 (Prohibited Deductions).

Table 1 — The general deduction formula dissected

Table 2 — Revenue deduction vs capital allowance

Table 3 — Assessed loss rules (Section 2 + Section 15(3))

Diagram — Is the outlay deductible under the general formula?

flowchart TD
 A[Outlay or loss in the year] --> B{Expenditure or loss actually incurred?}
 B -->|No, provision/notional| X[Not deductible]
 B -->|Yes| C{For purposes of trade OR in production of income?}
 C -->|No| X
 C -->|Yes| D{Of a capital nature?}
 D -->|Yes| E[Excluded from Section 15 2 a; consider capital allowances]
 D -->|No| F{Prepayment used up in a later year?}
 F -->|Yes| G[Deduct proportionately over years of use]
 F -->|No| H{Mixed purpose?}
 H -->|Yes| I[Apportion: deduct trade/revenue part]
 H -->|No| J{Barred by Section 16?}
 J -->|Yes| X
 J -->|No| K[Deductible in full]

Statutes & sections (Income Tax Act [Chapter 23:06])

• Section 15(1) — deduction gateway; provisos (a) currency variation, (b) trade/investment vs employment ring-fence, (c) mining vs other trade ring-fence.
• Section 15(2)(a) — the general deduction: expenditure and losses incurred for the purposes of trade or in the production of income; (i) capital exclusion; (ii) prepayment proportionate rule (substituted Finance Act 1/2018).
• Section 15(2)(b)–(z) — specific deductions (repairs, capital allowances, fund contributions, etc.) — see Specific Allowable Deductions.
• Section 15(3) — carry-forward of assessed loss: FIFO; six-year cap (mining excepted); insolvency forfeiture (proviso (i)); loss-trafficking denial (proviso (ii)); old/new company and conversion continuity (provisos (iii), (v)); multi-location mining breakdown (proviso (vi)).
• Section 15(4) — no double deduction of the same amount.
• Section 2 — definitions of "trade" (broad) and "assessed loss" (deductions exceed income; employment income excluded).
• Section 8(1) — definition of "taxable income" (income less deductions).
• Section 16 — Prohibited Deductions (the negative override; read together with Section 15) — see that lesson.

Finance Act [Chapter 23:04]

• Rates applied to the taxable income that results after deductions (company/trust 25% (Section 14(2)(c)); individuals to 40% for YA 2025); plus the AIDS Levy surcharge.

Case law (annotated in the source Act against Section 15(2)(a) and the assessed-loss provisions)

• Delta Beverages 22-SC-003; SW (Pvt) Ltd 19-HH-499 — production-of-income limb.
• A Bank Ltd v ZIMRA 20-HH-270 — capital-nature computer expenditure; ring-fencing.
• NOC (Pvt) Ltd 19-HH-765 — no artificial splitting of a single payment.
• M (Pvt) Ltd 15-HH-665 — director-theft losses not deductible.
• G Bank Ltd 15-HH-207 — staff retrenchment costs.
• Unki Mine (Pvt) Ltd 22-SC-015 — structure-preserving donations.
• L v COT 91-HH-001 — personal/medical cost (eye operation) disallowed.
• GG v COT 76-ITC-1258; 'JA' v COT 92-ITC-1645 — intention/trade questions.
• Deb (Pvt) Ltd 19-HH-664 — matching of expenses.
• 'T.' Ltd v COT 66-RLR-021 — capital/exempt-income expenditure.
• Old Mutual Zimbabwe 16-HH-143 — assessed loss; "capital" ≠ "exempt".

Related lessons

• Income Tax Foundations (the funnel), Capital vs Revenue Receipts (the capital boundary applied to expenditure), Specific Allowable Deductions (Section 15(2)(b)–(z)), Capital Allowances (recovery of capital expenditure), Prohibited Deductions (Section 16, the negative override).