Why eTIMS errors happen
Most eTIMS errors trace back to one of a few things: a detail that does not match KRA records, a connection problem, or an invoice field that is missing or wrong. They feel alarming but are rarely mysterious, and they almost never mean your whole system is broken.
Knowing the usual suspects lets you fix problems in minutes rather than panicking. The categories are: identity and PIN issues, transmission and connection issues, and invoice content issues. Work out which category you are in and the fix follows quickly.
The deeper point is that errors are mostly preventable. A till that validates the buyer PIN before it sends, enforces the required fields, and signs invoices offline when the line drops simply does not produce most of these failures. Where an error does occur, logging it tells you whether it is a one-off mistype or a recurring setup fault that needs a permanent fix.
Common eTIMS errors and their fixes
Match your symptom to the cause and apply the fix.
- 1
Invalid or mismatched PIN
If an invoice is rejected over the buyer PIN, confirm the PIN is correct and active. A wrong or inactive PIN on a B2B invoice is a frequent cause of rejection.
- 2
Details do not match KRA records
If your business details fail validation, align them exactly with iTax. Mismatched names or branch details block invoices.
- 3
Transmission failed
If an invoice will not transmit, it is usually the connection. A good system signs and queues the invoice offline, then syncs when the line returns, so you keep selling.
- 4
Invoice stuck pending sync
Queued invoices that have not synced usually clear once the connection is stable. Confirm your system actually retransmits queued invoices.
- 5
Missing required field
If an invoice is rejected for content, check for a missing item description, VAT treatment or buyer detail, and complete it.
- 6
Wrong VAT treatment
An invoice that misstates VAT can be rejected or cause reconciliation issues. Confirm each line’s VAT status and reissue or credit as needed.
What makes eTIMS errors worse
Selling without issuing while you troubleshoot
If you keep selling without compliant invoices during an error, you create a compliance gap. Use a system that queues invoices offline instead.
Editing instead of crediting
Trying to fix a transmitted invoice by editing it does not work. Use a credit note to correct it.
Ignoring repeated errors
A recurring error signals a setup problem, often a mismatched detail. Fix the root cause rather than working around it daily.
Relying on a system that cannot work offline
If your till stops the moment the connection drops, every outage becomes an error and a queue of unhappy customers. The fix is structural: use a system that signs and queues invoices offline, so a dropped line is a non-event rather than a daily crisis.
A rejected invoice, fixed in minutes
A cashier gets an error issuing a B2B invoice. The cause is the buyer’s PIN, mistyped by one digit, so KRA rejects it. The cashier corrects the PIN, reissues, and the invoice goes through with a control number. Total downtime: a couple of minutes.
Later, the connection drops entirely. Instead of stopping, the POS signs invoices offline and queues them. When the line returns, the queued invoices sync to KRA automatically. The lesson is that the right system turns most errors into minor, self-healing events rather than a halt to trading.
A week later the same rejection keeps appearing on invoices to one regular customer. Rather than correcting it sale by sale, the owner checks the saved buyer record, finds the PIN was stored with a transposed digit, and fixes it once. The recurring error disappears, which is the difference between treating a symptom and removing the cause.
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 prevents and absorbs errors
Veira validates details as you go, signs invoices and queues them offline, then syncs to KRA on reconnect, so the most common error, a dropped connection, never stops you selling. Transmission failures become a non-event.
For content issues, the till enforces the required fields and VAT treatments, so invoices are right the first time. When a correction is genuinely needed, Veira issues a compliant credit note rather than leaving you to hack at a transmitted invoice.
Veira also logs what failed and why, so a recurring rejection points you straight at the setup detail behind it, usually a stored PIN or a business detail that does not match iTax. You fix the root cause once instead of working around the same error every day.
Frequently asked questions
Why is my eTIMS invoice being rejected?
What do I do if transmission fails?
My invoices are stuck pending sync. Is that a problem?
Can I fix a transmitted invoice that was wrong?
Why do I get the same eTIMS error repeatedly?
Should I keep selling if invoices will not transmit?
How do I stop the same eTIMS error happening daily?
Can I prevent most eTIMS errors before they happen?
Why is eTIMS not working today? (Is eTIMS working today?)
How do I fix KRA eTIMS login problems?
What does "pending eTIMS sync" mean and how long does it take?
How do I fix "Unable to activate e-invoicing: inactive/invalid PIN number" on eTIMS?
What should I do if I issue a wrong partial credit note on eTIMS?
Most eTIMS errors fall into identity, connection or content issues, and each has a quick fix once you know the cause. Better still, the right system prevents the common ones and absorbs dropped connections so you never stop selling. Run the readiness checker to catch setup issues early, or book a free demo and let the till handle errors for you.