Reviewed by Glenrich Consultants' tax team. Last reviewed: September 2026. General guidance only — confirm rates and section numbers against the current Finance Act before relying on this for a specific filing.
Imagine you're in a professional interview and you're asked: "What is the corporate income tax rate in Tanzania?"
You answer: "30%."
That answer is the issue. It's not wrong, but it's incomplete — and in a professional setting, incomplete is the wrong answer.
Here is the complete one: corporate income tax in Tanzania is a Union matter. It is administered by the Tanzania Revenue Authority (TRA), and it works exactly the same way in Mainland Tanzania and in Zanzibar — one law, one administering authority, no separate regime on either side. This is different from VAT, where Mainland and Zanzibar run separate laws and separate rates (see our Zanzibar tax guide for businesses for that split). For corporate tax, there is no separate "Zanzibar rate" or "Mainland rate" to look up. TRA is the authority either way, under the Income Tax Act, Cap. 332.
With that established, the standard rate is 30%. But 30% is only the headline number — the full picture, how that number is actually arrived at, and how the system runs during the year, is what follows.
Corporate Tax Rate in Tanzania: The Full Rate Schedule
The standard rate of 30% applies to a resident corporation and to a domestic permanent establishment (branch) of a non-resident. Beyond that, the official direct-tax rate schedule sets out a series of specific rules:
# | Rule | Resident | Non-resident |
|---|---|---|---|
(a) | Tax rate on total income of a corporation | 30% | 30% |
(b) | Where an entity has not made a distribution for the year of income within 12 months after the end of that year of income, 30% of the undistributed income is deemed to have been distributed | 10% | N/A |
(c) | Corporations with perpetual unrelieved losses for 3 consecutive years — excludes agriculture, tea processing (applies 1 July 2024 to 30 June 2027 only), and provision of health and education services | 1% | N/A |
(d) | Sale of forest produce (timber, logs, mirunda, poles) — single-instalment income tax, individuals only, from 1 January 2026 | 2% | N/A |
(e) | Newly listed corporation on the DSE, with at least 25% of its equity issued to the public, for 3 consecutive years from the date of listing | 25% | 25% |
(f) | Extractive sector: the percentage of taxable income that will not be reduced by unrelieved losses is increased from 30% to 40% | 30%* | N/A |
(g) | Newly established manufacturer of pharmaceuticals or leather products with a Government performance agreement — first 5 consecutive years from commencement of production | 20% | N/A |
(h) | Total income of a domestic permanent establishment | N/A | 30% |
(i) | Digital Service Tax — payments to a non-resident rendering electronic services consumed in the URT | N/A | 2%† |
(j) | Repatriated income of a domestic permanent establishment of a non-resident | N/A | 10 |
How Does Corporate Tax Work in Tanzania? Estimate, Pay, File
Once the rate schedule is understood, the next question is how the tax actually gets paid during the year — because it is not a single payment made after the accounts are finalized.
Step 1: Estimate. At the start of the year, the company estimates its taxable income and corporate tax liability for the year ahead.
Step 2: Pay quarterly. That estimated liability is paid to TRA in quarterly instalments through the year, not as one lump sum at year-end.
Step 3: Finalize and report. After year-end, the company closes its accounts, prepares its audited financial statements, completes its tax computation, and files its final annual income tax return — reconciling what was actually owed against what was already paid through instalments.
That's the cycle: estimate → pay quarterly → finalize and report.
What Triggers a TRA Corporate Tax Audit?
The mechanics behind that cycle are simple: revenue minus expenses gives profit, and profit is what corporate tax is charged on. That sounds straightforward, but it's exactly where audits come from.
Think of a TRA audit as a form of bank reconciliation. Your company has its own records and its own understanding of how a transaction should be treated. TRA has its own information and its own view of how the same transaction should be treated. Some things line up. Some things don't — not necessarily because either side made a mistake, but because one side is missing information the other has, or because a figure was reported differently from how TRA expected it under the standard. That gap is what an audit is testing.
This becomes more likely, not less, the more successful the business is. A company or investment that is generating strong revenue and real profit is naturally more likely to attract TRA's attention and, eventually, a statutory audit questioning how that position was arrived at. That is exactly the point at which a business needs a professional who can stand behind the numbers — not scramble to reconstruct them after TRA has already asked the question.
FAQs
What is the corporate income tax rate in Tanzania? The standard rate is 30% of taxable income, for both resident companies and non-resident branches — but several specific categories of taxpayer are taxed at different rates, from 1% to 25%.
Is corporate tax the same in Zanzibar as on the Mainland? Yes. Corporate income tax is a Union tax under the Income Tax Act, administered by TRA identically in Zanzibar and Mainland Tanzania — unlike VAT, which runs on separate laws and rates in each.
What happens if my company doesn't distribute its profit? If a resident company doesn't distribute after-tax profit within 12 months of year-end, 30% of that retained profit is deemed distributed and taxed at a 10% withholding rate — even if no cash was actually paid out.
How is corporate tax paid during the year? Through quarterly instalments based on an estimate of the year's taxable income, reconciled against the actual liability once the final return is filed after year-end.
What triggers a TRA audit? Any mismatch between what your records show and what TRA's information suggests — and this becomes more likely, not less, as a business becomes more profitable.
Get Your Corporate Tax Position Reviewed
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This guide provides general information on corporate income taxation in Tanzania and should not be treated as tax advice for a particular transaction or taxpayer.
Deemed Distribution Tax on Retained Profit in Tanzania
This is a recent rule (Finance Act 2025) worth understanding on its own, since it changes how retained earnings should be planned.
If a resident company does not distribute its after-tax profit within 12 months of the end of the year of income, 30% of that retained profit is deemed to have been distributed as a dividend — whether or not any cash actually left the company. That deemed distribution is subject to a 10% withholding tax. If the company later makes an actual distribution of the same profit, that amount is not taxed again — the 10% already paid on the deemed distribution stands in for it. This sits alongside the ordinary dividend withholding rates covered in our Withholding Tax in Tanzania guide.
The policy intent is explicit: discouraging indefinite retention of profit purely to defer dividend withholding tax. For a foreign-owned company reinvesting profits into the Tanzanian business rather than repatriating them, this is a real cash-tax cost to plan for, not just a compliance footnote.
Accounting Profit vs Taxable Income in Tanzania
A company with TZS 1 billion profit before tax in its audited accounts cannot assume its tax bill is TZS 300 million. Financial statements are prepared under IFRS; the tax computation is prepared under the Income Tax Act. The two are reconciled:
Accounting profit before tax
- non-deductible expenses
- accounting depreciation +/– other tax adjustments – capital allowances – allowable deductions – available tax losses, subject to the applicable rules = Taxable income
Only taxable income is multiplied by the applicable rate.
Worked illustration:
Accounting profit before tax — TZS 1,000,000,000 Add: non-deductible expenditure — TZS 100,000,000 Add: accounting depreciation — TZS 150,000,000 Less: qualifying capital allowances — (TZS 200,000,000) Taxable income — TZS 1,050,000,000
Corporate income tax at 30% = TZS 315,000,000
The figures are illustrative, but the principle is not: the tax calculation starts from the accounts and does not necessarily end at the accounting profit figure.
Penalty for Underestimating Corporate Tax in Tanzania
The Tax Administration Act specifically addresses this. Where an instalment payer's estimate — or revised estimate — comes in below 80% of the correct final tax liability, interest is charged at the statutory rate on the resulting shortfall, calculated under the Act's compounding formula. It is not a single flat penalty on the undervalued amount; it accrues over the period the shortfall existed.
Worked example: a company's correct annual corporate tax liability turns out to be USD 30,000, but it estimated and paid only USD 4,000 through the year. That estimate is well under 80% of the correct figure, so beyond paying the USD 26,000 shortfall on finalisation, the company also faces statutory interest on that shortfall for the period it went unpaid. The lesson holds regardless of the precise figure: a low estimate used as a cash-flow tactic tends to cost more than the cash-flow benefit it was meant to create.