eTIMS compliance in Kenya has moved beyond issuing electronic invoices. In 2026, your eTIMS records can affect whether expenses are accepted, how returns are validated, and how quickly you receive payment from government clients.
Since January 2026, KRA has increased its use of data-driven validation. It can compare your income tax return with eTIMS invoices, withholding tax records, customs data, and other electronic information. KRA may also issue pre-populated returns, which means some return information can be filled using data already available to the authority.
That creates a clear business priority: your invoices, books, payments, stock records, and tax returns must tell the same story.
Here are seven practical mistakes businesses are still making, and how to fix them.
1. Leaving buyer PINs and invoice details incomplete
A common failure starts at the point of sale. The business issues an invoice but leaves out the buyer’s KRA PIN, uses an incorrect PIN, or enters a vague description such as “services rendered.”
That invoice may look complete to your team. However, missing or inaccurate information can create problems during validation, expense claims, VAT reviews, or customer audits.
How to fix it
Create a simple invoice-quality checklist. Before finalizing an invoice, confirm:
- Supplier details: Correct business name and PIN.
- Buyer details: Correct customer name and PIN where required.
- Transaction details: Accurate description, quantity, value, and tax treatment.
- Timing: Invoice issued at the time of supply or according to the applicable requirement.
- Corrections: Credit notes and cancelled invoices properly recorded.
Train the sales, procurement, and operations teams, not only the accountant. Many eTIMS errors begin outside the finance department.
Zidika can help you set up eTIMS compliance support and practical approval controls so your invoices are accurate before they reach KRA or your customer.
2. Treating manual receipts as enough evidence
Some businesses still rely on handwritten receipts, WhatsApp confirmations, till slips, or M-Pesa messages as their main records.
These documents may prove that money changed hands. They do not always prove that the transaction was captured correctly for accounting and tax purposes. A manual receipt can easily be forgotten, duplicated, or posted to the wrong expense category.
The risk is now greater because an expense without a valid eTIMS invoice may be disallowed. At a 30% corporate tax rate, a KES 100,000 cost that is not accepted could create an additional KES 30,000 tax burden.
How to fix it
Use a daily capture process:
- Collect supplier eTIMS invoices as soon as purchases are made.
- Save the invoice with the supplier name, date, amount, and payment reference.
- Match it to the M-Pesa, card, or bank transaction.
- Flag missing invoices before the monthly books are closed.
- Separate statutory exceptions, such as certain payroll and import transactions, from ordinary business expenses.
Manual methods can still work for smaller businesses. The important point is consistency. If you use spreadsheets, create a shared expense register. If your transaction volume is higher, connect your accounting software to your invoicing and payment systems.
3. Failing to reconcile eTIMS, M-Pesa, bank, and accounting records
A business can have valid invoices and still fail compliance because its records do not match.
For example, your sales report may show KES 1.2 million, your M-Pesa statement may show KES 1.15 million, and your accounting system may show KES 1.3 million. Timing differences, duplicated entries, missing receipts, refunds, and unpaid invoices can all create gaps.
KRA’s data-driven approach makes these differences harder to ignore.
How to fix it
Complete a monthly reconciliation between:
- eTIMS sales and purchase records
- Bank statements
- M-Pesa, Till, and PayBill statements
- Point-of-sale reports
- Accounting software
- Withholding tax certificates
- VAT records and filed returns
A reconciliation is simply a process of matching two sets of records and investigating differences. It gives you visibility before a tax return is submitted.
Cloud accounting, combined with M-Pesa and bank reconciliation automation, is now the baseline expectation for businesses that want timely and accurate records. Zidika’s bookkeeping services include cash and bank reconciliations, transaction recording, and monthly financial reporting.
4. Buying from suppliers without checking their compliance
Your supplier’s compliance can affect your business. If a supplier fails to issue a valid eTIMS invoice, you may struggle to support the related expense or claim input VAT.
Input VAT is the VAT paid on eligible purchases that can be offset against VAT charged on your sales. Without proper supporting documents, that claim may be rejected.
This is particularly important when buying from informal suppliers, small vendors, contractors, and service providers who still issue ordinary receipts.
How to fix it
Build supplier checks into your purchasing process:
- Request the supplier’s PIN and business details.
- Confirm that the invoice is generated through an accepted eTIMS solution.
- Check the invoice description, amount, VAT treatment, and date.
- Keep evidence of delivery or service completion.
- Do not approve payment until required documentation is available.
- Use buyer-initiated invoicing where the law and the transaction qualify.
Your procurement team should understand that “we have paid” is not the same as “we have a complete tax record.”
Our taxation services in Kenya help businesses review documentation, identify compliance gaps, and apply allowable deductions and credits correctly.
5. Recording expenses but failing to claim eligible input VAT
Some businesses capture purchase invoices in their books but never review whether they have claimed all eligible input VAT. Others claim VAT without checking whether the invoice is valid, whether the supplier is compliant, or whether the purchase relates to taxable business activity.
Both errors cost money.
How to fix it
At every VAT review, separate purchases into three groups:
- Eligible claims: Valid invoices connected to taxable business activity.
- Pending claims: Transactions requiring a corrected invoice or missing document.
- Non-claimable items: Purchases that do not meet the applicable VAT requirements.
Review credit notes, supplier corrections, exempt supplies, and mixed-use expenses carefully. Do not wait until the filing deadline. A monthly review gives your team time to follow up with suppliers.
This is where tax advisory and bookkeeping cleanup work together. Clean books make it easier to identify missed claims without creating unsupported ones.
6. Ignoring stock records and the coming stock management module
For businesses that sell goods, eTIMS cannot be separated from inventory.
A sale recorded in eTIMS should make sense when compared with stock movements, purchase invoices, delivery notes, and payment records. If these records do not match, the business may struggle to explain missing stock, unusual margins, or differences between sales and purchases.
A mandatory stock management module is coming to eTIMS. Businesses that wait until implementation is immediate may face avoidable disruption.
Government suppliers face an additional requirement. eTIMS is now linked with IFMIS, the government financial management system. Invoices submitted through IFMIS must match the eTIMS record, including descriptions, quantities, and values.
How to fix it
Start preparing now:
- Create clear stock codes and product descriptions.
- Record purchases when goods are received.
- Match sales invoices to stock movements.
- Investigate negative stock and unusual adjustments.
- Reconcile physical stock with system records.
- For government contracts, confirm that eTIMS and IFMIS entries match exactly.
Zidika’s accounting automation services can help integrate accounting, inventory, invoicing, and sales tracking systems suited to your business size and budget.
7. Treating eTIMS as an invoicing tool only
The biggest mistake is viewing eTIMS as a task for issuing invoices and nothing more.
In practice, eTIMS now connects with:
- Sales and income reporting
- Expense deductibility
- VAT claims
- Supplier management
- Stock control
- Government procurement
- Tax return validation
- Audit and compliance reviews
Payroll also needs close attention. Businesses must correctly manage SHIF at 2.75%, the Housing Levy at 1.5%, and tiered NSSF contributions. Payroll is generally treated differently from ordinary supplier expenses, but errors in payroll deductions and remittances can still create penalties and employee disputes.
How to fix it
Assign ownership across the business. Finance should not work in isolation.
Set a monthly compliance meeting to review:
- eTIMS sales and purchases
- Bank and M-Pesa reconciliations
- VAT and withholding tax
- Payroll deductions
- Supplier documentation
- Stock differences
- Outstanding KRA notices
- System errors and support tickets
Finance Act 2026 provides for written notice before certain electronic compliance penalties are applied. System-generated errors may also support a waiver of penalties or interest, subject to the law. Keep screenshots, error messages, support tickets, and correspondence. A system failure is easier to explain when you have evidence.
The reformed framework also includes a 5% penalty cap in applicable cases, but businesses should not treat that as protection against weak records. A cap does not make poor processes safe.
A practical eTIMS compliance routine for 2026
Use this simple cycle every month:
- Capture: Record every sale, purchase, payment, and receipt.
- Check: Review invoice details, buyer PINs, supplier records, and VAT treatment.
- Match: Reconcile eTIMS with accounting software, M-Pesa, banks, stock, and payroll.
- Correct: Follow up on missing invoices, duplicates, credit notes, and system errors.
- Review: Check whether the figures agree before filing or approving a return.
This process does not need to be complicated. It can begin with a structured spreadsheet and manual checks, then grow into cloud accounting and automated reconciliations as your business expands.
Take control of eTIMS compliance in Kenya
Good tax compliance in Kenya now depends on accurate data flowing through the whole business. The goal is not simply to issue an invoice. It is to maintain a reliable process from purchase or sale to payment, bookkeeping, reconciliation, and tax filing.
Zidika helps businesses organize eTIMS records, clean up bookkeeping gaps, reconcile M-Pesa and bank transactions, review tax obligations, and prepare for changing digital requirements.
Whether you need ongoing accounting services in Kenya, bookkeeping services in Nairobi, or support from a practical tax consultant in Kenya, we can help you build a process suited to your business.
Clean records give you better visibility, fewer surprises, and greater confidence as your business grows. Let’s talk.
