Variations (ÄTA) — how to handle changes and additions properly

ÄTA is the Swedish term for changes, additions and omissions — anything that departs from the original quote. The basic rule is simple: no variation work should be carried out before it has been documented, priced and approved by the customer. Verbal agreements are the single most common reason trade contractors do not get paid for work they have done.

The three types

Change: a line item in the original quote is done differently — the customer wants marble instead of standard tiles. Addition: new work outside the original scope — damp damage discovered during the strip-out has to be dealt with. Omission: work that is dropped — the customer keeps the existing fittings in the hallway and should get money back.

All three should be documented. Omissions are the ones most often forgotten — and that is bad, because a customer who does not see the credit for dropped work trusts the rest of the invoice less.

Why verbal is never enough

Mid-job it feels natural to say "we will sort that too" and have the money conversation later. But when the invoice arrives the customer remembers a different figure, or believes the addition was included. Without written approval it is one word against another — and in consumer relationships the customer’s word often carries more weight.

The Swedish Consumer Services Act (konsumenttjänstlagen) also gives the customer a right to clear price information. A variation approved in writing, with a price, before the work was carried out is in practice impossible to dispute.

Price it in line with the original quote

A variation should be priced with the same hourly rates and markups as the original quote — not as a new standalone job. Customers compare, and an addition that looks more expensive per hour than the base job creates distrust even when it is justified.

Worth knowing: the ROT deduction is normally handled in connection with the original quote and the final invoice — check how the addition affects the customer’s total deduction headroom before you promise anything.

The practical flow that works

Discover → document (ideally with a photo) → price → send for approval → wait for the yes → carry out. The whole chain has to be fast, or the build stops. This is where digital tools make a real difference: in Bliqat you create a variation straight from the original quote — talk the change in out loud where you are standing, attach photos from site — and the customer approves digitally from the sofa, often within the hour. The addition, change or credit is priced in line with the original quote and everything is documented ready for the final invoice.

Common questions

Does the customer have to approve a variation in writing?

There is no formal requirement in law, but without written approval it is your word against the customer’s. Digital approval with the price stated is the easy way never to end up there.

What do I do if the customer refuses to pay for a verbal variation?

Gather whatever evidence exists — texts, photos, witnesses — but expect a difficult negotiation. The lesson going forward: no variation work without documented approval, however urgent it feels.

Updated 2026-06-10. This guide is general information — for the current tax rules, see Skatteverket, the Swedish Tax Agency.