What eTIMS integration actually does
Instead of a person entering invoices into a portal, an integrated system passes invoice data through a control unit that signs it and transmits it to KRA programmatically. Your POS or ERP becomes the place where compliant invoices are born, as a by-product of normal operations.
For a business doing real volume, this is the only sustainable approach. Manual entry does not scale past a certain number of invoices a day, and every manual step is a chance for error. Integration removes both the bottleneck and the mistakes.
There is a maintenance angle that is easy to underestimate. The eTIMS rules, formats and validations change over time, and an integration has to keep pace or it quietly starts failing. This is why the choice is rarely just build versus buy; it is about who carries the ongoing burden of staying current with KRA every time something shifts.
How integration comes together
Whether you build or buy, the path to a working integration runs through the same checkpoints.
- 1
Confirm your eTIMS onboarding
Your KRA profile must be onboarded and your integration type chosen, including whether you need offline-capable signing.
- 2
Connect through a control unit
The system signs invoices via a software control unit. A reputable provider handles this so you do not build it from scratch.
- 3
Map your invoice data
Your products, prices and VAT treatments are mapped to the KRA invoice format so every transmitted invoice is correct.
- 4
Handle offline gracefully
A good integration queues invoices when the connection drops and syncs on reconnect, so trading never stops.
- 5
Test thoroughly before going live
Run test invoices, confirm control numbers and QR codes, and verify the data reaches KRA before relying on it.
Integration mistakes
Building it all in-house without need
A bespoke integration is expensive to build and maintain, and the rules evolve. For most businesses, a maintained POS or platform is safer and cheaper.
No offline handling
An integration that fails when the internet drops will stop your business. Offline queueing and sync are essential in Kenya.
Skipping proper testing
Going live without test invoices invites silent failures. Confirm control numbers, QR codes and transmission first.
Ignoring ongoing maintenance
An integration is not a one-off project. When KRA changes formats or validations, an unmaintained connection starts rejecting invoices. Budget for upkeep, or use a platform that carries it for you.
When integration pays off
A supermarket chain doing thousands of transactions a day across several branches cannot have staff typing invoices into a portal. It needs every till to sign and transmit invoices automatically, consistently, across all branches, with central visibility.
With an integrated POS, each sale at every branch produces a compliant invoice in real time, queues safely during any outage, and syncs to KRA on reconnect. The finance team sees one consolidated, compliant record. Building and maintaining that in-house would be costly and fragile, which is why most businesses integrate through a maintained platform instead.
The hidden cost shows up a year later. When KRA adjusts an invoice format or a validation rule, the in-house build needs a developer to notice, fix and retest it, often under deadline pressure while invoices are bouncing. A maintained platform absorbs that change centrally, so the supermarket chain never feels it. Over several years, that ongoing burden, not the initial build, is what makes bespoke integration expensive.
Trading without eTIMS-compliant tax invoices risks KRA penalties, blocked VAT input claims for your customers, and receipts a business buyer cannot expense.
Veira signs every sale to KRA eTIMS automatically, so each receipt is compliant the moment it prints, with no separate device to reconcile.
Integration without the build
Veira is the integration for most businesses. It connects to KRA, signs and transmits invoices automatically, works offline with sync on reconnect, and is maintained as the rules evolve, so you never carry the cost and risk of a bespoke build.
It runs across every till and branch on one account with central visibility, and every paid plan includes a free handheld terminal. You get the benefits of API integration without writing or maintaining a line of code.
Veira also carries the maintenance. When the eTIMS rules or formats change, the platform is updated centrally, so your tills keep transmitting valid invoices without you commissioning a fix. The ongoing cost and risk that sink most in-house builds simply are not yours to carry.
Frequently asked questions
What is eTIMS API integration?
Who needs eTIMS integration?
Should I build my own eTIMS integration?
Does integration work offline?
How do I know the integration is working?
Can one integration cover multiple branches?
Who maintains an eTIMS integration when the rules change?
Is integration a one-off cost?
eTIMS API integration is what makes compliance invisible at scale, but you rarely need to build it yourself. A maintained POS gives you automatic signing, offline resilience and central visibility without the cost and risk of a bespoke project. Run the readiness checker to see if you are ready to integrate, or book a free demo and connect to KRA out of the box.