Automating eTIMS Invoicing Without Losing Your Mind
Achieng runs a busy supplies business in Industrial Area. Every evening, after the last delivery van leaves, she sits down with a cup of tea and a stack of invoices and types each one again into KRA's eTIMS. Same customer, same items, same amounts, typed twice. By the time she finishes, the tea is cold, the security guard is locking up, and she is seriously considering a career in farming. If that sounds like your evenings, eTIMS invoicing automation for your Kenyan business is worth a serious look.
A quick refresher on eTIMS
eTIMS is KRA's electronic Tax Invoice Management System. In broad terms, it is the way businesses generate tax invoices that KRA can see and validate, and it has become central to how expenses are recognised for tax purposes. The exact obligations depend on your business, so always confirm the details that apply to you with KRA guidance or a qualified tax adviser. We are software people, not your tax consultant, and we would like to keep it that way.
What matters for this article is the practical side. KRA provides several ways to issue eTIMS invoices, ranging from manual options suited to low volumes up to system integrations meant for businesses that already invoice from their own software. If you are issuing a handful of invoices a month, the manual route may be fine. If you are issuing dozens a day, typing them twice is a recipe for errors and burnout.
Signs you have outgrown manual eTIMS
Someone spends an hour or more every day re-entering invoices.
Invoice numbers or amounts in your system do not always match what is in eTIMS.
Month-end involves a frantic hunt for invoices that were never transmitted.
Customers ask for a valid eTIMS invoice and you have to promise it "by evening".
Your accountant has started sighing every time you walk into the room.
How eTIMS invoicing automation works in practice
The idea is simple: an invoice should be created once, in the system where you already make sales, and then flow to eTIMS automatically. Instead of Achieng copying data, her sales or accounting system sends each invoice through an approved integration, receives the validated details back, and prints them on the invoice the customer receives.
In a typical setup:
A sale is recorded in your point of sale, invoicing or ERP system as usual.
The system sends the invoice details to eTIMS through the integration.
The validated invoice information comes back and is attached to the record.
The customer gets a compliant invoice by email, WhatsApp or print.
Failures are flagged immediately so someone can fix them the same day.
That last point is important. Connections drop, especially when the internet decides to take a long lunch. A good integration retries automatically and shows clearly which invoices are pending, rather than silently failing and leaving you to discover the gap at month-end.
Getting your data ready
Automation will expose every inconsistency in your records, quickly and without mercy. Before you connect anything, tidy up:
Customer details, including correct KRA PINs where required.
Product and service lists, with the right tax treatment for each item.
Invoice numbering, so there are no duplicates or gaps.
User access, so only the right people can issue or cancel invoices.
This clean-up feels tedious, but it pays for itself. Clean data means fewer rejected invoices and fewer awkward calls from customers whose finance teams are, understandably, strict about valid invoices.
Choosing an approach
If your current accounting or POS software already supports eTIMS, start there and ask your provider how to switch it on. If your invoices come from a custom system, it may need an integration built for it. And if you are invoicing and collecting payments in different places, consider bringing them together, which is part of the thinking behind PesaVista for collections and invoices. For bespoke systems, our team handles this kind of integration work as part of our software development services.
Whatever route you take, test thoroughly with real invoices before switching off the old process, and keep your tax adviser in the loop.
Achieng's business made the switch last quarter. Her invoices now go to eTIMS the moment they are created, and her evenings belong to her again. She still drinks tea at six o'clock. It is just hot now.