Mandate
The budget ceiling you set before a contractor starts work
A mandate is a signed instruction from you to the contractor: do this work, for this price, by this date, with these guarantees. The clause is one sentence, sent in the first email before any work begins.
You are authorised up to EUR ___ to complete this repair. If you expect the cost to exceed that amount, stop and provide a written cost indication and a timeframe for completion before proceeding.
The mechanism: the mandate fixes the budget before the contractor sees the problem. Without it, the price is announced at the moment of maximum stress for the homeowner. With it, the contractor accepts within budget, declines, or surfaces overruns in writing.
The distinction matters at three moments. Comparing bids without a mandate clause is a comparison of intentions, not commitments. When work runs over, the contractor is bound to flag in writing rather than bill after. When something fails in year two, the mandate establishes who is responsible.
The calculation
Four inputs, all knowable before the contractor sees the problem. Estimate the hours. Multiply by the local hourly rate for the trade. Add a call-out fee counted as one hour at that rate. Add materials as a share of labour, which varies by trade: around 80% of labour for plumbing, 50% for electrical work, 35% for painting, 100% for roofing. In the Netherlands roofing takes 75%: Dutch roofs are mostly tile, and tile carries a lower material share than slate. The ratios lean generous on purpose, because a mandate is a ceiling that should cover most jobs. Round the total up to the nearest 25.
Worked example. Anni in Helsinki has a bathroom leak traced to a corroded shower mixer and the supply connections behind it: a half-day plumbing job. Four hours at EUR 90, mid-range for a Helsinki plumber with VAT included, is EUR 360. The call-out, counted as one hour, adds EUR 90. Materials at 80% of labour add EUR 288. That totals EUR 738; rounded, the mandate is EUR 750. The contractor sees one sentence and one number; the breakdown stays with Anni.
Sibling frame: quote (the contractor’s offer) and estimate (their prediction, which in Finland, Sweden and the Netherlands carries a statutory tolerance: they may go over, but only so far). Confusing any two of the three is a common source of homeowner overpayment. The mandate itself is a ceiling on time and materials work; where the job is well defined enough to specify, a fixed price shifts the overrun risk to the contractor instead. See the how-to-set-a-mandate guide for the calculation method in full.
Common questions
How do I calculate a mandate amount?
Four inputs, all knowable before any contractor sees the problem: your estimate of the hours, the local hourly rate for the trade, a call-out fee counted as one hour at that rate, and a materials estimate as a share of labour. The share varies by trade: around 80 percent of labour for plumbing, 50 for electrical work, 35 for painting, 100 for roofing, ratios that lean generous because a mandate is a ceiling. In the Netherlands roofing takes 75: tiled roofs carry a lower material share than slate. Sum them, round up to the nearest 25, and send the total as a lump sum in the first message. The breakdown is for you, not the contractor.
What happens if the contractor expects to exceed the mandate?
The clause obliges them to stop and give you a written cost indication and a timeframe before proceeding. You then decide with a number in front of you instead of an invoice behind you. That is the mandate's mechanism: it moves the price conversation from the end of the work, where you have no options, to the start, where you have all of them.
Is a mandate the same as a quote?
No, and the difference shows up on the invoice. A quote you accepted is enforceable against the contractor for the scope it names. An estimate is their prediction, capped in Finland, Sweden and the Netherlands but still only a prediction. A mandate is the one of the three you wrote: the budget ceiling you authorise before work begins, carrying the obligation to flag overruns in writing. Comparing bids without a mandate compares intentions; adding the mandate is what turns a comparison into a commitment.