With Kenya’s annual tax filing window now open and the June 30, 2026 deadline drawing closer, the Kenya Revenue Authority is urging taxpayers to act early and this year, the cost of waiting is higher than it has ever been.
Taxpayers are required to file income tax returns for the year of income January 1 to December 31, 2025, with the filing window running from January 1, 2026 to June 30, 2026. But the machinery behind those filings has changed fundamentally.
Effective January 1, 2026, KRA began validating income and expenses declared in both individual and non individual income tax returns against data sources including TIMS, eTIMS, withholding income tax records, and import records from Customs. The shift means errors that once slipped through undetected at submission are now surfaced automatically and early.
KRA has described the update as part of its strategy to ensure an early and seamless filing process ahead of the June 30 deadline, issuing guidelines that emphasize accurate deductions, proper documentation, and income validation through the iTax system.
For businesses, the implications are direct. KRA has clarified that businesses can still deduct legitimate expenses even without an eTIMS receipt, but they cannot simply list those expenses and expect KRA to take their word for it supporting schedules with supplier PIN numbers must be uploaded to iTax before filing proceeds.
If a supplier fails to capture a buyer’s PIN on eTIMS, that expense will be automatically disallowed during the 2026 filing. This places the burden on businesses to verify their supplier chains well before the deadline, not after a return is rejected.
KRA has encouraged taxpayers to request eTIMS and TIMS schedules of their annual income and expenses from designated account managers as an early reconciliation step. The penalties for late filers remain steep. The late filing penalty stands at KES 2,000 for individuals or five percent of the tax due, whichever is higher, with late payment interest accruing at one percent per month on any unpaid balance.
With the new validation system running and pre filled returns already appearing on iTax for many taxpayers, the message from KRA is clear the window to correct mistakes quietly is open now, not in June.
