What eTIMS API error codes are telling you
When you integrate with eTIMS through an API, KRA returns a code and message if something is wrong with a submission. These are not random; each points to a category of cause. The three you meet most are validation errors (a field is missing, wrong or in the wrong format), authentication errors (your credentials or session are not valid), and connection or transmission errors (the request did not reach or complete).
The exact codes, their numbers and their precise meanings are defined in KRA's official eTIMS API documentation, and they change as the system evolves, so the reliable move is to read the exact code and message you received and match it to KRA's current documentation rather than a guessed list. Most resolve quickly once you know which category you are in.
Most eTIMS errors are not mysteries; they are a missing field, a sync gap or a wrong setting, each quick to fix.
How to fix it, step by step
Work through these in order. Stop when the issue clears.
- 1
Read the exact code and message
Capture the precise error code and text returned. The message usually names the field or cause, which is most of the answer.
- 2
Match it to KRA's API documentation
Look the code up in KRA's current eTIMS API documentation to confirm the category and required fix, since codes change over time.
- 3
Fix the cause and resubmit
Correct the field, refresh the credentials or restore the connection as the category indicates, then resubmit the invoice.
- 4
Log recurring codes
If a code recurs, note the pattern. A repeating validation error usually points to a setup issue worth fixing at the source.
How to stop it happening again
Guessing the meaning instead of reading it
Codes are specific. Read the exact code and message and match it to KRA documentation rather than assuming.
Ignoring a repeating code
A code that keeps returning is a setup problem, not a one-off. Fix it at the source so it stops.
Building the integration yourself unnecessarily
If you do not need a custom integration, compliant software that handles transmission removes most error-code handling entirely.
A developer clears a validation error
A developer integrating a shop's system with eTIMS kept getting a rejection on certain invoices. Rather than guessing, they read the exact code and message, which pointed to a field formatting issue.
They matched the code to KRA's API documentation, confirmed the required format, corrected how that field was built, and the invoices submitted cleanly.
The error was specific and the message named the cause, so reading it carefully, rather than guessing, was the fastest route to the fix.
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.
How Veira avoids this
Veira is built so most eTIMS errors never reach you. It issues compliant KRA eTIMS invoices automatically with the right fields and tax treatment, validates as you go, captures the buyer PIN for business customers, and transmits to KRA, recording locally and syncing when you are offline so nothing gets stuck.
When something does need attention, Veira surfaces it clearly and local support helps you resolve it, rather than leaving you to decode a raw error. It runs on a free terminal or the phone you own, from KES 2,999 a month with a 30-day money-back guarantee. See how Veira works, or book a free demo.
Frequently asked questions
What do eTIMS API error codes mean?
Where do I find the list of eTIMS error codes?
Why does the same error keep happening?
Do I need to handle error codes at all?
Will Veira stop this error happening?
Where do I confirm KRA-specific details?
eTIMS API error codes is usually a quick fix once you know the cause, and with a compliant system like Veira it rarely arises at all. See how Veira works, or book a free demo. Always read the exact error and confirm KRA-specific steps at kra.go.ke.