The short answer
Accounting software holds the ledger; eTIMS holds the invoice. The join matters most on the buying side, where deductions depend on documents most businesses do not chase.
The other system
Our reading, not a rule. Nothing below is a statement of what KRA requires.
An accounting package is where the books live: sales, purchases, what is owed and what is owing. It is built around periods and balances rather than around individual transactions at a counter.
Why a business joins them
Our reading, not a rule. Nothing below is a statement of what KRA requires.
On the selling side, so an invoice raised once appears in both places. On the buying side - which is where the money usually is - so the purchase documents a business needs to substantiate its deductions are captured as they arrive rather than reconstructed at year end, which is when it is too late.
What would move, and which way
Our reading, not a rule. Nothing below is a statement of what KRA requires.
- Sales out: the invoice, so the ledger and the tax record do not have to be reconciled later
- Purchases in: the supplier documents, which is the exposure most businesses under-manage
- Credit and debit notes, which have to reference the original document in both systems or the trail breaks
Settle these first
Our reading, not a rule. Nothing below is a statement of what KRA requires.
- Whether the chart of accounts and the tax treatment in the books match what the invoicing side assumes. Where they diverge, the books quietly become the wrong answer.
- Who owns the join, in a business where the bookkeeper is external and part-time - which describes most Kenyan SMEs
- The timing gap: accounting works in periods, invoicing works in moments, and the reconciliation lives in that gap
- What happens to historical records if the business changes channel or package
What this does not solve
Our reading, not a rule. Nothing below is a statement of what KRA requires.
- It does not make the books right. It moves numbers between systems; whether those numbers were right is a separate question and usually a more important one.
- Nothing here substitutes for keeping the invoices your suppliers give you.
The question to ask a vendor. Ask what happens to a document that fails to post on one side but succeeded on the other, and how you would find out. That divergence is the failure mode, and it is silent.
What the rules say
This page explains how a requirement generally works. It is not tax advice, and it cannot account for the specifics of any one business. For a position you intend to rely on, confirm with KRA directly or with a registered tax agent.
Tax rules in Kenya change with each Finance Act and with regulations made during the year. Before acting on any figure, deadline or threshold, check the current position on KRA's own website.
Common questions
How do I know this information is current?
Tax rules in Kenya change with each Finance Act and with regulations made during the year. Before acting on any figure, deadline or threshold, check the current position on KRA's own website.
Related integrations
Sources
- officialeTIMS (Electronic Tax Invoice Management System) — Kenya Revenue Authority, checked 2026-09-18
- officialTax Procedures (Electronic Tax Invoice) Regulations, 2024 — Kenya Gazette / Kenya Law, checked 2026-09-18
- officialKenya Revenue Authority — Kenya Revenue Authority, checked 2026-09-18