Since January 2026, KRA has moved to data-driven validation of income and expenses declared in tax returns. Your figures are checked against TIMS/eTIMS invoices, withholding tax data, and customs records.
That creates a serious risk for businesses that claim expenses without complete electronic support. An expense with no valid eTIMS invoice backing it may be disallowed, unless it falls within a recognised exception or survives further review.
Here’s the practical impact. If KRA disallows a KES 1 million expense, that amount is added back to taxable profit. At the 30% resident corporate tax rate, your business could face approximately KES 300,000 in additional corporate tax. The money was already spent. You now pay tax on it as well.
The issue is not whether your business genuinely incurred the expense. The issue is whether you can prove it, classify it correctly, and match it to KRA’s records.
Use the list below to audit your books before KRA does.
The 10 deductions most at risk in 2026
1. Expenses with no valid eTIMS invoice
The rule: Most local business expenses must be supported by a valid, correctly transmitted eTIMS or TIMS invoice. The buyer’s PIN should be captured where applicable.
The common mistake: Your team files a receipt that is missing, incomplete, manually prepared, or issued without the company PIN. Sometimes the invoice exists but does not appear in the eTIMS data linked to your business.
The fix: Review your expense ledger against your eTIMS purchase schedule. Check the supplier PIN, invoice number, date, taxable value, tax amount, and buyer details. Keep a documented schedule for any genuine expense that cannot be matched immediately.
Certain items, such as emoluments, imports, interest, bank charges, some final-tax withholding payments, and investment allowances, may fall under statutory exceptions. They still need the right supporting records.
2. Purchases from non-compliant suppliers
The rule: A supplier should be registered and able to issue a compliant electronic tax invoice where required.
The common mistake: You purchase goods or services from a supplier who provides a handwritten receipt, an informal payment acknowledgement, or a system-generated document that was never transmitted to KRA.
This is especially risky where the supplier is not registered, is not onboarded to eTIMS, or appears in a category KRA considers non-compliant.
The fix: Add supplier compliance checks to your purchasing process. Before booking a significant expense, confirm the supplier’s PIN and request a valid eTIMS invoice. If a supplier cannot comply, escalate the transaction before payment.
3. Personal expenses paid through the business
The rule: A deductible expense must be incurred wholly and exclusively in producing business income.
The common mistake: The business account pays for the owner’s personal fuel, family travel, personal insurance, household expenses, or private subscriptions. These costs then appear in motor vehicle, travel, insurance, or general expenses.
Owner drawings are not business expenses.
The fix: Separate business and private spending immediately. Use clear drawings or director-loan records for personal payments. For mixed-use costs, document and claim only the genuine business portion.
A clean separation improves both tax compliance in Kenya and the accuracy of your management reports.
4. Capital expenditure claimed as an ordinary expense
The rule: Capital expenditure is money spent to acquire or improve a long-term asset. It is generally not deducted in full as a day-to-day operating cost. Instead, the business may claim the relevant capital allowance or wear-and-tear deduction, subject to the applicable rules.
The common mistake: A business buys machinery, computers, vehicles, major fittings, or a long-term improvement and posts the full amount under repairs, office expenses, or supplies.
This can overstate expenses in the current year and create an incorrect tax computation.
The fix: Create a fixed-asset register. Record the purchase date, supplier, cost, location, asset category, and business use. Separate repairs from improvements, then calculate the applicable capital allowance correctly.
5. Fines, penalties, and tax-related interest
The rule: Fines and penalties arising from breaking the law or failing to meet tax obligations are generally not deductible. This includes KRA penalties and interest on late tax payments.
The common mistake: The business posts a KRA penalty, late filing charge, traffic fine, regulatory penalty, or tax interest under administrative or finance expenses and assumes that every payment reduces taxable profit.
The fix: Maintain separate ledger codes for penalties, fines, and tax interest. Exclude them from deductible expenses during the tax computation. Track the underlying compliance failure so it does not recur.
Tax advisory is not just about filing returns. It is also about identifying costs that must be added back before filing.
6. Unsupported donations and charitable contributions
The rule: Donations are not automatically deductible because they support a good cause. The recipient, purpose, approval, and supporting documentation must meet the relevant requirements.
The common mistake: The company pays a contribution to an individual, informal group, school event, fundraiser, or organisation but keeps only a mobile money message or a thank-you note.
The fix: Before making the payment, confirm whether the recipient qualifies and what documentation is required. Keep the approval, official receipt, recipient details, payment evidence, and a clear record of the business decision.
Do not treat corporate giving and deductible charitable contributions as the same thing.
7. Entertainment, hospitality, and staff welfare without records
The rule: Entertainment and welfare costs need a genuine business or employment purpose, reasonable limits, and supporting evidence.
The common mistake: The ledger shows meals, events, client entertainment, team outings, gifts, or hospitality, but there is no record of who attended, why the cost was incurred, or how it supported the business.
Personal leisure is often disguised as client entertainment or staff welfare.
The fix: Attach a short business-purpose note to each material claim. Record the attendees, date, location, client or team involved, and approval. Set an internal policy for hospitality and welfare limits.
8. Unsupported payroll and unpaid statutory deductions
The rule: Payroll expenses must be supported by payroll records, employment details, payment evidence, and statutory filings. Emoluments may be treated differently from ordinary purchases for eTIMS validation, but that does not remove the need for accurate records.
The common mistake: A business claims payroll that was never actually paid, records unsupported casual labour, or treats unpaid statutory deductions as an additional business expense.
This includes amounts deducted from employees but not remitted, such as:
- Social Health Insurance Fund contributions: 2.75%
- Affordable Housing Levy: 1.5%
- Tiered National Social Security Fund contributions
- Pay As You Earn (PAYE) that was deducted but not remitted
A deduction withheld from an employee is not automatically a cost that has been paid to the relevant authority.
The fix: Reconcile the payroll register to bank payments, PAYE returns, payslips, and statutory payment receipts every month. Separate employee deductions, employer costs, and unpaid liabilities. Investigate differences before preparing the annual return.
9. Bad debts and provisions without evidence
The rule: A bad debt claim needs evidence that the debt has become irrecoverable and that the business has followed a proper write-off process. A general provision for doubtful debts is not enough on its own.
The common mistake: The company creates a percentage provision for old receivables but cannot show invoices, customer correspondence, collection attempts, legal action, insolvency evidence, or board approval for the write-off.
The fix: Maintain an aged receivables report and a recovery file for material debts. Keep statements, reminders, payment promises, demand letters, dispute records, and approval of the final write-off.
Your accounts receivable and payable process should make this evidence easy to retrieve.
10. Foreign and cross-border expenses without tax treatment
The rule: Cross-border transactions require proper contracts, invoices, payment evidence, withholding tax analysis, and, where related parties are involved, arm’s-length support. Arm’s length means the price and terms should resemble what independent parties would agree.
The common mistake: The business claims foreign consultancy, software, management, advertising, freight, or professional fees without checking withholding tax, transfer pricing, import documentation, or the correct tax treatment.
An overseas payment is not automatically exempt from Kenyan tax obligations.
The fix: Review the contract before payment. Determine whether withholding tax applies, retain the relevant certificate, confirm whether the service was provided by a non-resident without a permanent establishment, and keep customs or import records where relevant.
Quick risk review for your finance team
| Expense area | Evidence to check | Main risk |
|---|---|---|
| Local purchases | eTIMS invoice, supplier PIN, transmission | Add-back to taxable income |
| Supplier payments | Supplier registration and invoice validity | Non-compliant supplier |
| Payroll | Payroll, bank proof, PAYE and statutory returns | Unsupported or unpaid costs |
| Assets | Fixed-asset register and allowance schedule | Capital cost claimed immediately |
| Bad debts | Recovery trail and approved write-off | Provision disallowed |
| Donations | Recipient qualification and official documents | Non-compliant contribution |
| Foreign costs | Contract, WHT, payment and arm’s-length records | Tax exposure and disallowance |
What happens when KRA disallows an expense?
KRA may issue an additional assessment that increases your taxable income and tax payable. The assessment can arise from return validation, a review, or a later audit. Filing your return does not prevent reassessment.
For unpaid tax, the standard exposure can include a 5% late-payment penalty and 1% interest per month, depending on the tax and circumstances. Finance Act 2026 also introduced a specific capped regime for certain electronic-system failures. After the required written notice and opportunity to explain, the penalty may be the higher of 5% of the tax due or KES 100,000 for a company.
Keep every system-error record. Written notice is required for the relevant electronic non-compliance penalties, and genuine KRA system malfunctions may support a waiver of penalties or interest. Screenshots, error messages, emails, support tickets, reconciliations, and filing attempts can become your defence.
KRA is also tightening validation through the eTIMS–IFMIS connection for government suppliers. A mandatory stock-management functionality is being introduced to track stock received, sold, transferred, returned, adjusted, or disposed of. Businesses should expect closer alignment between purchases, inventory, sales, and tax invoices.
Before you file: a practical checklist
Complete this review before submitting your annual return:
- Reconcile the general ledger to the trial balance and tax computation.
- Download and review your eTIMS purchase schedule.
- Match material local expenses to supplier invoices and PINs.
- Identify manual receipts and unsupported supplier documents.
- Separate personal, private, and owner-related payments.
- Review capital items and calculate the correct allowances.
- Remove fines, penalties, and tax interest from deductible expenses.
- Reconcile payroll to bank payments, PAYE, SHIF, Housing Levy, and NSSF records.
- Review bad debts and retain the recovery and write-off trail.
- Check foreign payments for withholding tax and documentation.
- Prepare a schedule for exceptions, adjustments, and expenses requiring explanation.
- Keep evidence of any eTIMS, iTax, or system malfunction.
A documented, reconciled book is your strongest defence. It improves visibility before filing and gives you a clearer response if KRA asks questions later.
Need help reviewing your deductions?
Do not wait for an additional assessment to expose gaps in your records. Zidika Consulting helps Kenyan businesses clean up bookkeeping, reconcile eTIMS purchases, review tax computations, and prepare practical support schedules.
Our taxation services in Kenya and bookkeeping services are tailored to your business size, systems, and reporting needs.
Let’s review your expense claims before KRA does, so you can file with better control and greater confidence.
