Day rates vs priced work: which actually protects your margin

Every builder has had the argument, usually with themselves at 11pm: charge the day rate and stay safe, or price the job and back yourself. Both models can make you money and both can quietly bleed you dry. The honest answer is that they protect you from different things, and the winners choose per job.

Two ways to sell the same week

Strip the emotion out and the choice is simple. On a day rate, the client buys your time and carries the risk of how long the job takes. On priced work, the client buys an outcome for a fixed sum, and you carry that risk instead. Everything else, the arguments, the trust issues, the margin, follows from who is holding the risk.

Risk is not free. Whoever carries it should be paid for carrying it. That is the single sentence most pricing arguments forget, and it cuts both ways: a fixed price should be higher than the bare cost because you have absorbed the unknowns, and a day rate can be honest precisely because the client keeps them.

Where day rates protect you, and where they leak

Day rates shine when the work is genuinely unknowable. Ripping out a suspect floor, chasing damp through an 1890s terrace, working alongside a client who changes their mind daily: fixed-pricing that kind of chaos is gambling, and the day rate turns the gamble into a wage.

But day rates leak in three places. First, the rate itself is usually set too low, because builders benchmark against what other builders charge rather than against their own overheads and profit target. A day rate that just covers wages and the van is a job, not a business. Second, day rates cap your upside: work fast and skilled and you earn exactly the same as a slow week, so your efficiency is a gift to the client. Third, they invite scrutiny. The moment a client is paying for time, they start counting tea breaks, and the relationship shifts from professional to supervised.

Where priced work wins, and what it demands

Priced work is where the real money in building sits, for one reason: it pays you for competence, not attendance. If your team can do in eight days what the market prices at ten, a fixed price banks that difference every single job. It also wins better clients; people planning a £60,000 extension overwhelmingly want cost certainty, and will pay a premium for a builder who gives it to them confidently.

The demand is that your estimate has to be right, because every error is yours to absorb. Priced work without proper measurement is how firms go under while busy. That means quantities, rates you actually pay, allowances for preliminaries and risk, and written exclusions for the things you cannot see. Priced work does not forgive the two-line quote.

The margin maths, side by side

Take a four-week job with a two-person team as a worked illustration. Numbers are illustrative, the shape of them is not.

Notice the pattern: day rates flatten both tails. You cannot lose badly and you cannot win well. Priced work widens both, and everything then depends on how good your estimate was. Which is why the real question is never "day rate or fixed price" but "how confident am I in my numbers on this particular job".

A hybrid that actually works

You do not have to pick one religion. The pattern that serves small firms best on refurbishment work is fixed price for everything measurable, day rate for the genuinely unknown, agreed in writing up front. Price the extension shell, the roof, the finishes from proper quantities; carve out "opening up and repairs to existing structure" as day-rate work or a provisional sum with the rate stated. The client gets certainty on 90 percent of the job, you get protection on the 10 percent nobody can see, and neither of you is gambling.

Two rules make the hybrid hold up. Put the day-rate items and their trigger in the quote itself, so nothing feels sprung on anyone. And convert unknowns to fixed prices as soon as they become knowable: once the floor is up and the joists are visible, price the repair properly and move on.

Choosing per job: a quick filter

Ask three questions before you decide. Can I measure it? If most of the job is drawable and countable, price it. Can I see it? Hidden condition work leans day rate or provisional. Do I trust my rates? If your labour and material rates are current and honest, fixed pricing is backing yourself with good odds; if your last rate review was two years ago, fix that first.

Whichever way you go, the work of building a measured, rated quote is the same, and it is the repeated work QS Quoter assists: a draft bill of quantities from your job description or drawings, priced at your own day rates and material costs, with every line editable. You still review the scope, quantities, rates and assumptions before a fixed price is issued.