If you’ve been putting off eTIMS registration, or you know some of your invoices aren’t fully compliant, it’s natural to wonder how much trouble you’re actually in.
The honest answer: it depends on how long the gap has existed and how KRA finds out about it. But as of 2026, “how KRA finds out” is no longer a matter of luck. It’s now largely automatic.
This article walks through exactly what non-compliance costs, in order of how most businesses actually encounter it, starting with the quiet cost most people underestimate and ending with what to do if you’re already behind.
The Change That Makes This Urgent Now
For the first couple of years after eTIMS launched, enforcement was inconsistent; most businesses experienced it as a registration requirement rather than something actively checked against their filings. That changed on January 1, 2026.
Following a public notice KRA issued on November 7, 2025, the authority began validating every figure declared in income tax returns against real-time data, specifically eTIMS/TIMS records, withholding tax data, and customs import records.
This applies to both individual and non-individual (business) returns. In practice, this means:
For declared income, KRA compares what you reported against your eTIMS sales data and withholding tax records, and uses whichever figure is higher to check for under-declaration.
For declared expenses, KRA compares what you claimed against your eTIMS purchase records and uses whichever figure is lower, meaning you can only deduct what’s actually backed by a valid invoice, even if you genuinely spent more.
This is the mechanism behind most of what follows. It’s no longer about whether an auditor happens to pick your file: every return filed since the 2025 year of income has been checked this way at the point of filing.
1. Disallowed Expenses: The Cost Most Businesses Miss
This is usually the biggest financial hit, and it’s easy to underestimate because it doesn’t arrive as a single fine. It arrives as a larger-than-expected tax bill.
Under Section 16(1)(c) of the Income Tax Act, any business expense not supported by a valid eTIMS invoice cannot be deducted for tax purposes.
If your supplier didn’t issue one, KRA doesn’t partially allow the expense or ask for alternative proof; the amount is simply added back to your taxable profit.
A concrete example: if your business claims KES 100,000 in rent but your landlord never issued an eTIMS invoice for it, KRA disallows the entire deduction.
You end up paying corporation tax (typically 30%) on money you already spent, as though the expense never happened.
Scale that across a year of supplier payments (rent, utilities, transport, and raw materials), and the effective tax increase can be far larger than any single penalty on the books.
This risk is highest for businesses that rely on informal or partially compliant suppliers: construction, hospitality, logistics, and agriculture-adjacent businesses tend to be more exposed simply because more of their supply chain sits outside formal, eTIMS-registered trading.
2. Direct Monetary Penalties
Separate from disallowed deductions, there’s a direct penalty for failing to issue a required electronic tax invoice in the first place.
The figures here have shifted as the law has been amended, so it’s worth being precise: the original 2024 regulations (Legal Notice No. 64 of 2024) set the penalty at up to KES 1 million or 10% of the tax involved, whichever is higher.
Following amendments under the Finance Act 2025, more recent guidance points to a penalty of double the tax due, or KES 2 million, whichever is higher.
Given how often this figure has been revised, confirm the exact current amount with KRA or a tax advisor rather than relying on any single published number, including this one.
Whichever figure applies, the penalty is assessed per failure to issue a compliant invoice, not as a single one-off cap, so the exposure compounds with every non-compliant transaction, not just the first one.
3. VAT Input Tax Denial
If your business is VAT-registered, non-compliance hits from a second direction: input VAT can only be claimed against invoices that were transmitted through eTIMS and, where applicable, carry the buyer’s PIN.
A manual or non-eTIMS invoice, even a perfectly legitimate one, cannot be used to support an input VAT claim.
That means a supplier’s failure to invoice you correctly doesn’t just cost you the expense deduction; it can also cost you the VAT credit on the same transaction.
4. Blocked or Delayed Tax Compliance Certificate
KRA has linked Tax Compliance Certificate (TCC) issuance directly to eTIMS registration status.
iTax now automatically checks whether a taxpayer is eTIMS-compliant before processing a TCC application, and it will block the request even if all taxes are otherwise fully paid.
This matters more than it might sound, because a TCC is often a hard requirement for:
- Government and county tenders
- Many corporate contracts and supplier onboarding processes
- Certain business licenses and permits
- Bank loan applications
- NGO and donor-funded project participation
For businesses that depend on any of these, a compliance gap in eTIMS can quietly cut off revenue streams that have nothing to do with tax filing directly.
READ ALSO:How eTIMS Is Changing the Way Small Businesses in Kenya Manage Tax
5. Rejected or Reassessed Tax Returns
Because payment of tax and filing of a return are legally separate obligations, a return can be rejected or flagged for reassessment even if you’ve paid everything you believe you owe if the figures in your return don’t reconcile against eTIMS, withholding tax, and customs data.
Where a mismatch triggers a reassessment, the process typically looks like this: taxable income is adjusted upward, additional tax becomes payable on the disallowed amount, and penalties and interest begin accruing from the original due date, not from the date the mismatch was discovered.
6. Escalating Consequences for Repeat or Serious Non-Compliance
For businesses that remain non-compliant over an extended period, the consequences can go beyond financial penalties.
Repeat or serious non-compliance can, in some circumstances, lead to suspension of VAT registration, and company directors can face personal liability in cases of sustained non-compliance.
These are less common outcomes reserved for entrenched or wilful non-compliance rather than a single missed invoice, but they illustrate that this isn’t purely a bookkeeping issue: it’s treated as a governance issue by KRA.
What to Do If You’re Already Behind
If reading this has you worried about your own business’s exposure, the practical response matters more than the anxiety. A few concrete steps, roughly in order:
Register now if you haven’t
Every day outside eTIMS adds to the population of past sales that weren’t compliantly invoiced, and that population is now visible to KRA at filing time. Registering today doesn’t erase the gap, but it stops it from growing.
Reconcile your eTIMS purchase report against your expense ledger before filing
You can download your eTIMS purchase data from iTax and check it against your internal records monthly, so mismatches surface while there’s still time to chase suppliers for a corrected invoice, rather than at the point of filing.
Contact non-compliant suppliers directly
If a supplier hasn’t issued you an eTIMS invoice for a past transaction, ask them to correct this before your filing deadline.
For very small suppliers (annual turnover under KES 5 million) who aren’t eTIMS-registered, you may be able to use buyer-initiated (reverse) invoicing to generate a compliant invoice on their behalf, though this only applies where the supplier is not VAT-registered.
If an expense has already been disallowed or a return rejected, don’t ignore the notice
Review the assessment carefully, gather supporting evidence (contracts, proof of payment, correspondence), and lodge a formal objection within the statutory timelines if you believe the disallowance was incorrect.
Where the issue is a genuine documentation gap, amending the return or obtaining compliant documentation from the supplier is usually more effective than disputing the assessment itself.
If penalties or interest have already accrued, ask about relief options
KRA’s Automated Payment Plan (APP) allows businesses to spread principal tax payments over time, and periodic tax amnesty programmes have allowed waivers of penalties and interest (though not the underlying principal tax) for businesses that come forward and reconcile their records.
Availability and terms change, so check current eligibility with KRA or a tax advisor rather than assuming a past amnesty is still open.
Get your systems in order going forward, not just your past records
A one-time cleanup fixes today’s problem; matching your invoicing solution to your actual transaction volume (see our guide on choosing between eTIMS Lite, Client, and integrated POS/ERP options) is what prevents the next one.
The Bottom Line
The cost of ignoring eTIMS rarely shows up as a single dramatic penalty notice. More often, it accumulates quietly: a disallowed expense here, a denied VAT claim there, a blocked TCC application at exactly the moment you need one for a tender.
By the time all of it is visible in one place, at filing time, it can add up to a meaningfully larger tax bill than the business ever expected.
The good news is that the fix is mostly mechanical, not punitive: get registered, reconcile regularly, chase your suppliers, and treat eTIMS as part of your standard bookkeeping rather than a once-a-year compliance task.
Businesses that do this consistently tend to find the system manageable. The ones that get caught out are almost always the ones who treated it as optional for too long.
This article is intended as general information, not tax or legal advice. Penalty amounts, thresholds, and relief programmes referenced here are subject to change under Kenya’s Finance Act and KRA administrative guidance. Confirm current figures and your specific exposure with a licensed tax advisor or directly with KRA before taking action.
If your business is facing financial distress connected to tax debt or enforcement action, consider speaking with a licensed accountant or tax lawyer promptly. Earlier engagement generally produces better outcomes than waiting for the situation to escalate further.
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