The quote where the metre deceives

A stairlift is the purchase that gives back a whole house: the upstairs bedroom that had become a memory, the bathroom reachable without help, the independence that walks back in through the door. And it is also the quote where the metre deceives more than anywhere else: people ask «how much per metre?» as for a floor, but here half or more of the price never touches the staircase — it lives in the chair, its motor, the installation and the commissioning, which cost the same on a three-metre flight and on a twenty-metre one. This calculator puts the items back in their place — rail metres, track cost, path complexity, machine fixed cost — and sums the quote up in two honest numbers: the effective cost per metre and the index ι, read with this market's own bands.

The formula: the rail by the metre, the chair as a lump

The model is the stairlift's decomposition. The rail bill is L·c: the real metres along the flight — not the floor height — times the installed track cost. On that bill acts the complexity surcharge k: the straight staircase lives at 0-20%, bends, landings and difficult starts push towards 60-100 — every bend is a stretch of rail folded to measure. Outside the product stays the fixed cost F: the chair with its motor — twelfth appearance of the disguised fixed block, and this time the disguise falls: here the fixed cost is not an accessory item, it is the machine itself. The index ι = C/(L·c) stays dimensionless and comparable — but its bands, in this market, sit higher than elsewhere.

The flight scale: half a staircase, a whole chair

A 300-per-metre rail, 20% complexity, fixed 2,500; only the metres grow:

On the half flight the fixed items are worth seven tenths of the price and the effective metre grazes 1,200; on the grand staircase they fall to 30% and the metre halves to 516. It is the geometry explaining this market's classic surprise: the short staircase does not cost half the long one — because the chair, the motor and the commissioning do not shorten with the flight.

A complete numeric example

A typical stairlift: 6 metres of rail — the single flight of a two-storey house — at 300 per metre, complexity at 20% (an easy start, an arrival to study), fixed cost of 2,500 between chair, motor and commissioning. The rail bill is 6 × 300 = 1,800; the complexity brings it to 2,160; the chair closes at 4,660. The index is 4,660 / 1,800 = 2.59 — a value that in any other quote of this series would sound like an alarm, and that here is the market's physiology: the chair is worth more than the rail. Whoever compares stairlifts «per metre» is comparing the smaller item.

How to read the index — with this market's bands

The four bands sit higher than elsewhere, and tell four geometries. Below 2.0 the long rail dilutes the chair: the rare case of grand staircases. Between 2.0 and 2.8 the stairlift is well proportioned: the physiology of the average flight. Between 2.8 and 3.8 the complexity makes itself heard: bends and landings — the territory of the millimetre survey. Beyond 3.8 the chair dominates: the natural geometry of short flights. No band is «wrong»: ι says which of the quote's two souls — the track or the machine — deserves the lens before signing.

The rail: the true metres and the bends that fold them

The variable c sums up the installed track: the profile, the brackets on the step or the wall, the fitting. The 150-600 range tells the real market: the standard straight rail produced to stock versus the curved track folded to measure on the staircase's survey — which is why the complexity k is the quote's most sensitive variable: the straight staircase mounts a product, the curved staircase commissions a one-off. The metres are measured along the flight, with a survey: the floor height is not enough, and phone quotes on «a two-storey house» are worth as much as a photograph of the staircase taken in words.

The chair: the fixed cost that this time is the machine

The fixed cost F is the true heart of the purchase: the chair with its motor, the batteries that save from blackouts, the obstacle sensors, the installation and the commissioning. It is the item that does not shorten with the staircase — and the place where the real differences between quotes live: the swivel seat for safe dismounting, the controls suited to the hands that will use them, the right capacity. The trade rule: the chair is tried, not read — and the written service contract is worth more than any optional, because a stairlift works every day and for years.

International perspective: stairlift, Treppenlift and the same staircase

The stairlift is universal, the markets are not. The United Kingdom is its historic home, with the most mature used and reconditioned market; North America distinguishes residential installations from ADA rules for public spaces; continental Europe — Treppenlift, monte-escalier — often travels with barrier-removal deductions and grants, different in every country. Everywhere the structure of the count is identical: metres, track, complexity, machine. And the index ι compares quotes across markets on the same scale, because a ratio needs no exchange rate.

Limits of the model and proper use

The model photographs the chair stairlift on a flight: it does not cover wheelchair platforms — another machine, with its own weights and prices — nor home lifts, nor the local grants that can change the final bill. Metres and bends must be surveyed on site, and the capacity chosen on the real person. And accessibility is a domestic chain: the wheelchair ramp calculator solves the entrance steps, and the home elevator cost calculator does the maths of the cabin alternative when the staircase is not the right road — because the accessible house is designed once, but used every day.

Inside the quote: the bends scale and the chair scale

The six sections that follow put the model on the test bench over the two items that decide the real price. The first is the complexity: the same flight, with an ever harder path to follow. The second is the chair: from the essential kit to the machine complete with every comfort. The two tables use the example stairlift — 6 metres at 300 — and move one knob at a time: the cleanest way to see which of the quote's two souls is writing the final number.

The bends scale: the same track, different paths

6 metres at 300 per metre, fixed 2,500; only the complexity k grows:

From the perfect flight to the made-to-measure path the total grows by almost half — from 4,300 to 6,100 — without one extra metre of rail. It is geometry's price list: every bend is a stretch of track folded on the survey, and the effective metre climbs from 717 to over 1,000. The operating lesson sits in the share column (from 58 to 41%): the more the staircase complicates, the more the quote's centre of gravity shifts from the chair to the track — and that is where the questions belong.

Reading the scale: avoidable bends are money returned

The surcharge k is not destiny: it is partly a design choice. The final bend carrying the rail past the last step can often be replaced by a hinged parking section; the vertical start is negotiated with the position of the first support; the landing is crossed straight when the survey allows it. Every solution removing a fold from the track removes whole surcharge points — hundreds on the total. The right question at the survey is not «how much does the bend cost?» but «which bends can we avoid?».

The chair scale: from the essential kit to the complete machine

Same 6 metres at 300, complexity held at 20%; only the fixed cost F grows:

The last two rows travel with the flag lit: two thirds and more of the quote inside the chair. But here the flag is an invitation to detail, not an alarm: between the essential kit and the complete machine live the seat that swivels by itself, the controls for fragile hands, the increased capacity — items worth every figure for the right person. The share turns on the lens; the seated trial decides the judgement.

The item that is not in the price: the service over the years

A stairlift is a machine that works every day: batteries that age, sensors to calibrate, a track to keep clean. The serious quote arrives with the maintenance contract alongside — scheduled visits, response times in writing, parts availability over the years — because the machine's true price is the price of ten years of service, not of installation day. The trade rule: between two close offers, the one with the better service wins — a chair stopped mid-flight has no optional to console it.

Before signing: the four-knob checklist

A readable quote declares the model's four variables. Demand in writing: the metres measured with a survey along the flight; the track cost with the rail type (standard or made to measure); the surcharge justified bend by bend, with the alternatives studied; the fixed cost itemised — chair with model and equipment, batteries, commissioning. Then two questions worth more than any discount: what happens if the person's needs change (capacity, controls), and who answers — and how fast — when the machine stops. Whoever answers with numbers is selling independence; whoever answers with adjectives is selling a chair.

Frequently asked questions

How much does a stairlift cost?

With the decomposition C = L·c·(1+k/100) + F: the rail metres times the track cost, increased by the complexity, plus the fixed cost of chair, motor and commissioning. A 6-metre flight at 300 per metre, 20% complexity and a 2,500 fixed cost closes at 4,660 — an effective 777 per metre.

What is the stairlift quote index?

It is the ratio ι = C/(L·c) between the total and the rail-only bill. In this market the bands sit high: below 2.0 the long rail dilutes the chair; between 2.0 and 2.8 the physiology; between 2.8 and 3.8 the complexity makes itself heard; beyond 3.8 the chair dominates — normal on short flights.

Why does the short staircase not cost half the long one?

Because chair, motor, installation and commissioning cost the same on 3 and on 20 metres: on the half flight the fixed items are worth 69.8% and the effective metre grazes 1,200; on the grand staircase they fall to 30% and the metre halves. The chair does not shorten with the flight.

How much does straight versus curved matter?

It is the model's surcharge k, the most sensitive variable: the straight one mounts a standard rail (0-20%), the curved one commissions a track folded to measure on the survey (40-100%). Every bend has its price — and the bends avoidable with a different rail parking are money returned.

What does the rail cost per metre include?

The track profile, the fixing brackets on the step or the wall and the fitting. The 150-600 range tells the market: from the stock straight rail to the made-to-measure curved track. Metres are measured along the flight with a survey, never estimated from the floor height.

What does the fixed cost include?

The chair with its motor, the batteries, the safety sensors, the installation and the commissioning. It is the heart of the purchase — the item that does not grow with the metres — and where the real differences between quotes live: swivel seat, controls, capacity.

Does a stairlift work during a power cut?

Yes, if it has on-board batteries: the machine completes its trips and stays operational for limited cycles even during a blackout, recharging at the parking points. It is a fixed-cost item to always verify — the house's lift cannot stop mid-flight.

How long does installation take?

On a straight staircase often half a day: the standard rail is adapted and fixed to the steps. The curved one needs the millimetre survey, weeks of production for the made-to-measure track and a day of fitting. That is why the curve costs more even at equal metres.

Does the calculator work for stairlifts in other markets?

Yes: the structure of the count — metres, track, complexity, machine — is identical everywhere, from the UK, the stairlift's historic home, to Europe's barrier-removal grants. The index ι stays comparable because it is a ratio: the currency changes, not the geometry.

Stairlift or home lift?

They answer different questions: the stairlift uses the existing staircase and installs in days; the home lift serves wheelchairs and multiple floors, but asks for works and space. The practical rule: if the person walks and the staircase is sound, the chair wins on cost and time; for a wheelchair, the platform or the cabin is needed.

Do used or reconditioned stairlifts exist?

Yes, especially for straight staircases: the standard rail is re-adapted and the chair reconditioned, with significant savings. For curves it is harder — the track is made to measure of the staircase that commissioned it. Rule: used yes, but with warranty and service in writing.

What does the computed cost NOT include?

Wheelchair platforms and home lifts (other machines), masonry works where needed, the local grants and deductions that can reduce the bill, and the multi-year maintenance contract. It is the photograph of the chair stairlift: the rest is assessed on the survey and the local rules.

Updated July 2026