Top 10 iTax Filing Errors in Kenya and How to Avoid Them

By FNJ & Associates

Why do iTax filing errors in Kenya matter?

iTax filing errors in Kenya have direct financial and operational consequences. KRA’s automated risk engine flags returns that contain inconsistencies, mismatches against third-party data, or omissions of declarable income. Flagged returns are queued for review, which can result in additional assessments, penalties under the Tax Procedures Act, 2015, interest at 1% per month on unpaid tax, and in serious cases, audit visits and demand notices.

FNJ observes that nearly all common iTax filing errors in Kenya fall into a predictable set of categories. The 10 errors below account for the majority of return amendments and KRA review notices issued to individuals and businesses each year. Avoiding them at the filing stage is significantly cheaper than correcting them after the fact.

Error 1: Failure to align returns with eTIMS data

With the full implementation of the Electronic Tax Invoice Management System (eTIMS), KRA now cross-validates declared income and expenses against real-time eTIMS records submitted by suppliers and customers.

A growing iTax filing error in Kenya is submitting returns that contain figures inconsistent with eTIMS-generated invoices, credit notes, or stock movement data. This mismatch frequently triggers automated rejection, flagging, or post-filing review notices.

Fix: Ensure all business income and allowable expenses declared on the return are fully supported by eTIMS-compliant invoices, where applicable. Reconcile your internal records with the eTIMS portal before finalising the return.

Where discrepancies exist, amend the return appropriately, provide clear explanations and supporting documentation. FNJ recommends integrating eTIMS-compliant accounting software to automate this reconciliation and minimise manual errors.

Error 2: Using net pay instead of gross pay

On the resident individual return, employed taxpayers must declare gross emoluments from the P9 form, not net pay received after PAYE, statutory deductions, and pension contributions. Substituting net pay understates taxable income and triggers an automatic mismatch against the employer’s PAYE schedules already filed with KRA.

Fix: take the gross pay line from Box A of the P9 form, not the take-home figure on the payslip. Statutory deductions and reliefs are captured separately on the return and computed through the iTax form.

Error 3: Omitting withholding tax certificates

Withholding tax (WHT) deducted by clients, banks, or other payers is creditable against the final tax liability on the return. Failing to declare WHT certificates results in the taxpayer paying tax twice on the same income – once at source through WHT and again on the annual return.

Fix: log into iTax and download the WHT Certificates report, which lists every certificate issued under the PIN. Reconcile this against income declared and claim every applicable certificate as a credit on the return.

Error 4: Duplicating insurance relief

Insurance relief at 15% of premiums paid is available on life, health, and education insurance policies. Where the employer has already factored insurance relief into the monthly PAYE computation through the P9, claiming it again on the annual return double-counts the relief and triggers a KRA review.

Fix: check the P9 form’s relief section. If insurance relief has already been factored in through PAYE, do not claim it again on the return. If the employer did not apply the relief, claim it on the return and retain the policy documents as evidence.

Error 5: Declaring net business income instead of gross

Sole proprietors frequently declare a single net business income figure on the return, computed by subtracting expenses from revenue informally. iTax requires the gross business income, with allowable deductions claimed separately under the appropriate expense categories. The net approach prevents KRA from validating expense claims and increases the risk of an audit notice.

Fix: maintain proper books of account that distinguish revenue from expenses by category. Declare gross income, then claim allowable expenses against it on the return. FNJ provides outsourced bookkeeping that produces audit-ready records for accurate filing.

Error 6: Omitting income from multiple employers

Taxpayers who held more than one job during the year – whether sequentially or concurrently – must declare income from every employer. Each employer applies the personal relief and tax bands independently, resulting in under-deduction of PAYE on the secondary employment. Filing using only one P9 understates taxable income.

Fix: obtain P9 forms from every employer for the year. Declare each on the return. The reconciliation will typically produce additional tax payable, which is normal for multi-employer scenarios.

Error 7: Mishandling Monthly Rental Income tax

Landlords with annual residential rental income within the prescribed threshold are taxed under the Monthly Rental Income (MRI) regime at a final tax rate. A common iTax filing error in Kenya is declaring MRI-taxed income again on the annual resident individual return, which double-counts the income. Conversely, landlords above the MRI threshold or with commercial rental income must declare on the annual return – omitting it altogether is also a common error.

Fix: confirm whether your residential rental income falls under the MRI regime or the annual return. If MRI, file the monthly MRI return on iTax and do not re-declare on the annual return. If commercial or above the threshold, declare on the annual return and pay the resulting tax.

Error 8: Filing a nil return when income was earned

Filing a nil return when income was earned during the year is a serious iTax filing error in Kenya. A nil return represents to KRA that no taxable income was earned. If KRA later receives third-party data showing income – through employer PAYE filings, bank interest reports, or property transactions – the original nil return becomes a misrepresentation, attracting penalties beyond the standard late filing penalty.

Fix: file a full return capturing all income sources. If you have already filed a nil return in error, file an amended return through iTax disclosing the omitted income. Voluntary amendments before KRA initiates enforcement typically attract reduced penalties.

Error 9: Not retaining supporting documents

Section 23 of the Tax Procedures Act, 2015 requires every taxpayer to retain records supporting return entries for five years from the end of the tax period. Many taxpayers file the return and discard the underlying documents, only to be unable to produce evidence when KRA requests verification. Without supporting documents, the burden of proof rests on the taxpayer to demonstrate that the return is correct.

Fix: retain P9 forms, WHT certificates, bank statements, invoices, receipts, insurance policy documents, mortgage interest certificates, and any other return-supporting evidence for at least five years. Digital copies are acceptable provided they are legible and accessible.

Error 10: Missing the deadline and ignoring KRA notices

Late filing under the Tax Procedures Act, 2015 attracts a penalty of KES 2,000 for individuals or 5% of the tax due, whichever is higher, plus interest of 1% per month. A more costly iTax filing error in Kenya than late filing is ignoring KRA’s follow-up notices – default assessments, demands for additional information, or proposed amendments. Each notice has a response window after which KRA’s position becomes the final assessment.

Fix: file by the deadline. If the deadline is missed, file as soon as possible to stop further interest accrual. If KRA issues a notice, respond within the window provided, with supporting documents. FNJ assists clients in responding to KRA notices and in negotiating penalty waivers where the facts support such an application.

How FNJ & Associates helps avoid iTax filing errors in Kenya

FNJ & Associates offers affordable iTax return preparation and review for individuals, sole proprietors, partnerships, and companies across Kenya and the East African Community. The firm’s tax team draws on the experience of 20+ professionals holding CPA, CISA, CFE, CIA, CEH, and CAMS credentials, with an average of 12+ years of practice. Services include return preparation, prior-year cleanup, amendment filing, KRA notice response, and tax health checks designed to identify and correct iTax filing errors in Kenya before KRA does.

Our tax and KRA services page sets out how we prepare returns, manage tax compliance and support clients through KRA reviews.

Frequently Asked Questions

What are the most expensive iTax filing errors in Kenya?

The most expensive iTax filing errors in Kenya are filing a nil return when income was earned, declaring net business income instead of gross, and omitting income from a secondary employer or rental property. These errors typically trigger KRA audits resulting in additional assessments, penalties, and interest.

Can iTax filing errors in Kenya be corrected after submission?

Yes. iTax permits return amendments through the Amend Return function. Amendments should be filed as soon as the error is identified.

How long does KRA keep iTax filing records under review?

Section 23 of the Tax Procedures Act, 2015 requires taxpayers to retain records for five years. KRA can audit returns within this period and, in cases of suspected fraud or non-disclosure, beyond it. Maintaining complete supporting documents for at least five years is essential to defending against any review of iTax filing errors in Kenya.

What should I do if KRA issues a notice after I have filed?

Respond within the timeline stated in the notice, providing the requested information and supporting documents. Ignoring KRA notices converts proposed amendments into final assessments. FNJ assists clients in responding to KRA notices and in clearly articulating the facts that support the taxpayer’s position.

Can FNJ & Associates review my return for iTax filing errors in Kenya?

Yes. FNJ offers an affordable iTax filing review service where the firm examines a draft or submitted return for common iTax filing errors in Kenya, recommends corrections, and assists with amendments where needed. Visit fnjassociates.co.ke to schedule a tax filing review.