Corporate Tax in Kenya: Rate, Filing Deadlines, and Instalment Tax

The Corporate Tax Rate

For most Kenyan-resident companies, the rate is a flat 30% on net taxable income. That's income after allowable deductions — not gross revenue. Non-resident companies earning Kenya-source income pay a higher rate of 37.5%, since they're not entitled to the same deduction structure available to residents.

There are a few legislated incentives worth knowing:

• Newly listed companies on the NSE: 25% tax rate for the first five years from the date of listing. The incentive is designed to encourage companies to go public.
• Manufacturers outside Nairobi and Mombasa with 100+ employees: 15% rate for ten years. This is a deliberate push to industrialise upcountry regions and reduce concentration in the two main cities.

For everyone else — your standard limited company running trading, services, or consulting — the 30% rate applies from the first shilling of taxable profit.

Instalment Tax: The Part Most Directors Get Wrong

This is where companies frequently get caught out. Many directors assume corporate tax is something you calculate after the year ends and pay when you file. That assumption is wrong, and it's an expensive one.

KRA requires companies to pay estimated tax in four instalments during the accounting period itself. The due dates are the 20th day of the 4th, 6th, 9th, and 12th months of your accounting year. For a company with a December year-end — the most common in Kenya — that means:

• 20 April — first instalment
• 20 June — second instalment
• 20 September — third instalment
• 20 December — fourth instalment

Each instalment is 25% of your estimated annual tax liability. The estimate is based on what you expect to owe for the full year — so you're essentially projecting your profit before the year is even over.

If you underpay your instalments relative to the actual tax owed, KRA charges a penalty of 2% per month on the shortfall. That penalty accrues from the date each instalment was due, not from the filing date — so it can quietly accumulate throughout the year while you're focused on running the business.

The practical implication: even if cash is tight in April, skipping the first instalment without a plan is more expensive in the long run than paying late or borrowing short-term to cover it.

The Annual Tax Return

Instalment tax covers the payments during the year. The annual return is the formal reconciliation — where you declare actual income, deductions, and tax due, and settle any balance remaining after the four instalments.

The return is due six months after your accounting year-end. For December year-end companies, that's 30 June. You file on iTax using the Income Tax Company Return (IT2C form), and you'll need the company's KRA PIN to access the portal.

What you attach depends on the size of the company. Larger companies typically submit audited accounts; smaller ones may use management accounts, but you'll need supporting schedules — a profit and loss statement, a balance sheet, and workings on the tax computation. KRA uses the return to verify that your instalments were appropriately calculated and to raise any additional assessment if there's a shortfall.

If you don't file, the consequences are significant. KRA can raise an estimated assessment — based on whatever data they have — and that assessment stands unless you dispute it. Disputing an estimated assessment is bureaucratically tedious and slow. Filing your own return, even if imperfect, is almost always the better path.

Late filing penalty: KES 20,000 or 5% of the tax due, whichever is higher. For a company with a KES 500,000 tax bill, 5% is KES 25,000 — and that's before any interest on unpaid tax.

What You Can Deduct

Corporate tax is charged on net taxable income, not on revenue. The gap between gross income and taxable income is determined by which expenses KRA accepts as deductible. Getting this right is where good bookkeeping pays for itself.

The following are generally deductible:

• Staff salaries, wages, and the employer's PAYE contributions
• Rent on business premises
• Business utilities — electricity, water, internet, phone
• Cost of goods sold and direct cost of services rendered
• Advertising, marketing, and promotional spend
• Professional fees — audit, legal, accounting
• Interest on business loans (subject to thin capitalisation rules — more on this below)
• Capital allowances on qualifying assets (see the next section)
• Bad debts written off — but only with proper documentation showing genuine attempts to recover
• Business-related subscriptions and software licences

The key principle is that the expense must be wholly and exclusively incurred in the production of income. Personal expenses mixed into company accounts are a red flag in any KRA audit.

What You Cannot Deduct

Some costs are explicitly excluded, and KRA auditors know exactly what to look for:

• Personal expenses: school fees for the director's children, personal travel, meals that aren't strictly business-related, running a personal vehicle through the company without proper benefit-in-kind treatment
• KRA penalties and fines: the tax system doesn't allow you to reduce your tax bill by deducting taxes or penalties you owe
• Donations: charitable contributions are generally not deductible unless made to approved charitable organisations, and even then, limits apply
• Excessive management fees to related parties: if your Kenyan company pays management fees to a parent company or a director-related entity, KRA will scrutinise the amount against what an arm's-length arrangement would look like
• Prior year expenses: you can only claim a deduction in the year the expense was incurred. Catching up three years of missed rent deductions in one return won't fly

Capital Allowances: How KRA Handles Depreciation

This trips up many company directors and accountants. For tax purposes, your own accounting depreciation is irrelevant. It doesn't matter that you wrote off a vehicle over four years in your books. KRA has its own prescribed wear and tear rates, and those are the ones that count.

The key rates:

• Buildings: 2.5% per year (this is low — a building takes 40 years to fully depreciate for tax)
• Motor vehicles: 25% per year on reducing balance
• Computers and equipment: 30–37.5% depending on classification
• General machinery: 10–12.5% per year

There's also an Investment Deduction — a first-year allowance of 100% on capital expenditure for specific qualifying investments. If your company is building a manufacturing plant, a hotel, or a hospital, you may be able to deduct the entire cost of the structure in the first year. This is a significant incentive and worth checking with your accountant before a major capital project.

The practical effect: your taxable income may look different from your accounting profit in any given year, depending on how heavy your capital expenditure was relative to your accounting depreciation rates.

Thin Capitalisation: A Note for Companies with Shareholder Loans

If your company borrows money from its shareholders or from related parties, and the interest-bearing debt exceeds three times the equity (a 3:1 debt-to-equity ratio), any interest on the excess debt is not deductible. This is the thin capitalisation rule, and it's most relevant to multinationals and companies where shareholders have funded the business through loans rather than equity.

For a typical Kenyan SME funded primarily through equity or bank loans, this rule rarely applies. But for companies where a director or a parent company has made substantial loans to the business, it's worth understanding before you structure the financing.

A Worked Example

Put the numbers together for a straightforward trading company:

The company pays KES 270,000 on 20 April, 20 June, 20 September, and 20 December — totalling KES 1,080,000 across the year. By the time the annual return is filed by 30 June of the following year, there is no balance owing (assuming the estimate was accurate). If actual profit turned out higher, a top-up payment is due with the return. If it turned out lower, the company has a tax credit to carry forward or apply against future instalments.

Keeping the Company Compliant

The single most common compliance failure for Kenyan companies is not the annual return — it's the quarterly instalments. Companies get busy, cash flow is variable, and the April instalment slips. Then June slips. By the time December arrives, the company faces a large catch-up payment plus months of 2% monthly penalties on each missed instalment. It compounds quietly.

The cleanest approach is to treat instalments like rent: a fixed obligation on a specific date, not optional. If your profit projection is uncertain — which it often is in the first half of the year — use a conservative estimate for the first two instalments and revise upward in the third and fourth. KRA allows revisions to instalment estimates, and paying more in the back half of the year is better than underpaying all four quarters.

Make sure your company's iTax credentials are current, that the company's registered address is up to date, and that whoever manages tax obligations has the authentication tokens in hand well before each due date. iTax has a way of developing technical difficulties precisely when you're trying to file under pressure.

If KRA has not filed a return for your company in more than a year, expect to receive a notice of estimated assessment. These are difficult to set aside without evidence that you've filed — and the estimated figures are usually unflattering. Filing your own return, on time and with supporting schedules, is always the more defensible position.