How to Quote a Stair Runner Job Without Underselling Yourself

Start with the site visit, not the phone quote

A phone or email quote given without seeing the stairs is a guess dressed up as a number, and it usually comes back to bite you when the real job turns out to have a winder, a bowed stringer, or a floor covering that's been glued down rather than tacked. On any job I haven't seen in person, I tell the client the phone figure is a rough range only, and that a proper quote follows a fifteen-minute site visit where I measure the flight myself rather than trusting a client's own tape measurements, which are very often out by an inch or two on tread depth alone.

During that visit I'm checking five things: the exact step count, whether the flight is straight or has a turn or winder, the tread and riser dimensions, the condition of the existing gripper and underlay, and access for getting materials up to the landing. I write all of this down on the spot rather than trying to remember it later, because details like “third step from the top has a slightly different riser height” matter once cutting starts and are easy to forget by the time you're back at the workshop.

Measuring the flight accurately

Measure every single tread and riser rather than measuring one and multiplying by the step count, because older staircases in particular are rarely perfectly uniform. On a 13-step US flight I'd expect something close to a 10 in tread run and 7.5 in riser on most steps, but I've fitted flights where the bottom two steps ran noticeably longer than the rest to account for a skirting detail, and missing that would have left the runner short by several inches at the base.

Once you have accurate per-step figures, add them up rather than relying on an average, then add a nosing wrap allowance (typically 0.75 in or 1.9 cm per step for a standard rounded nosing) and a top-and-bottom finishing allowance for tucking under a landing carpet or finishing cleanly at the base. This gives you the true linear length before waste, and it's the number that should feed directly into your quote's material line.

How much runner do I need?

Working the same 13-step US example: 10 in tread run plus 7.5 in riser plus 0.75 in nosing wrap equals 18.25 in per step. Across 13 steps that's 237.25 in, or 19.77 ft. Add a 24 in finishing allowance (12 in at each end) for 261.25 in, or 21.77 ft, then apply a 9% waste margin for cutting and any minor pattern alignment, which brings the total to roughly 23.7 ft, the figure to write on the quote.

In UK metric terms, a 25 cm tread run plus 19 cm riser plus 1.9 cm nosing wrap gives 45.9 cm per step. Across 13 steps that's 596.7 cm, plus a 60 cm finishing allowance for 656.7 cm, then a 9% waste margin brings the total to roughly 7.16 m. Always round the final figure up to the next half-unit your supplier sells in, since ordering the exact calculated length with no buffer leaves no room for a measuring slip.

Pricing labour realistically

Once you know the material quantity, price labour based on complexity rather than a blanket rate for every job. A straight flight with no turn is the quickest job you'll do; add a winder, a half-landing, or an open-sided stringer that needs extra fixing, and the time on site can roughly double. As a rough, typical range, straight-flight labour often sits around $10-16 per step (roughly £8-13), with winders and turns adding a separate line rather than being blended into an average per-step figure across the whole job.

1. Measure every tread and riser on site, not from memory or a client's own tape reading
2. Calculate the true linear length including nosing wrap and finishing allowance
3. Apply a waste margin of 5-10% depending on pattern complexity
4. Price labour per step, with separate line items for winders, turns or awkward access
5. State clearly what counts as an extra once work begins

Common ways fitters undersell a job

The single most common underselling mistake is quoting a flat “stairs job” price without breaking out winders or turns, which then forces the fitter to either eat the extra time or have an awkward conversation mid-job about additional cost. The second most common mistake is failing to check the condition of the existing gripper and underlay before quoting, which means a full strip-and-refit gets priced as if it were a simple carpet swap over sound fixings.

A third, quieter mistake is underestimating waste on a patterned runner. Plain runners can be quoted with a 5-6% margin most of the time, but anything with a repeating motif or border needs closer to 10%, since keeping the pattern aligned down 13 steps means wasting a little length at each repeat point. Quoting a patterned job at the same waste percentage as a plain one is a fast way to run short of material halfway up the flight, which then means a delay while more is ordered and a client watching an unfinished staircase in the meantime.

Writing the final number

Once you have accurate measurements, a realistic waste margin and a labour price that reflects the actual complexity of the flight, the final quote should read as a short, itemised breakdown rather than a single figure. Clients trust an itemised quote more than a round number, because it shows the price came from real measurements rather than a guess, and it gives you documented cover if the job later needs a genuine extra. Running your numbers through a stair runner calculator before you commit them to a written quote is a quick way to sanity-check the material figure against your own hand measurements, especially on a flight with a turn or landing where the arithmetic gets more involved.

For anyone fitting stair runners regularly, building a simple template you reuse for every job, adjusting only the step count, dimensions and waste percentage, saves time on every single quote and keeps your pricing consistent from one client to the next.

Whatever you decide, get the numbers first: the stair runner calculator doubles as a stair runner length calculator, adding nosing wrap, landings, winders, pattern repeat and waste so you order the right length the first time.