
A spare car key costs between £120 and £250 in Worthing, cut and programmed at your vehicle while the original key still works. The same car with every key lost costs roughly twice that.
That gap is the whole subject of this guide. A spare and a replacement get treated as the same purchase almost everywhere, and they are not. One is a planned job with a working key in your hand. The other is an unplanned one without it.
How much does a spare car key cost?
The table below sets each type of key against what a spare costs while the original still works, and the one thing most likely to push a quote to the top of its band.
| Key type | Spare, with a working key | What pushes it higher |
|---|---|---|
| Mechanical key, no chip | £60 to £110 | An awkward blade profile on an older car |
| Transponder key | £120 to £190 | Whether the make allows a straight add |
| Remote or flip key | £150 to £230 | The remote and the chip coding separately |
| Smart or proximity key | £200 to £320 | Recent models with restricted access |
| Van key | £150 to £260 | Which generation the van is |
Those figures include VAT and cover the key, the cutting, the programming and the visit as one charge. Almost nobody states that, and it matters, because a figure quoted without VAT looks twenty per cent better than it is.
Three things move a quote within its band, in this order. The make and model comes first, then whether the remote codes separately from the chip, then the hour of the visit. Spare car keys are quoted from the registration before anyone sets off, so the number does not move once it is given.
Why does a spare cost less than a replacement?
Because a working key is a shortcut the car itself provides.
With a key present, the vehicle can be asked to add another one, and the key already in the ignition is what proves the request is allowed. The job is an addition to a record that stays otherwise untouched.
With no key at all, that permission has to be established another way. The record is read rather than added to, ownership is checked before anything starts, and on many vehicles the work takes two or three times as long. Lost car keys is that version of the job.
So the same car, the same key and the same equipment cost roughly half as much while one key still works. There is also a cost that disappears entirely. A car with no working key often cannot be driven anywhere, and recovery is a bill a spare never generates.
What decides the price of a spare key?
Six things decide where a quote lands. They do not carry equal weight, and the table below puts them in order of how much each one actually moves the figure.
| Factor | How much it moves the price | Why |
|---|---|---|
| Key type | The largest single factor | A smart key is roughly three times a mechanical one |
| Make and model | Large | Premium and recent models sit at the top |
| Vehicle year | Moderate | Newer cars carry more restricted access |
| Remote coding separately | Moderate | Adds a second operation to the same visit |
| Hour of the visit | Small on a planned job | A spare is booked, so this rarely applies |
| Keys already on the record | Small | A few minutes each, and worth checking anyway |
What are you paying for, the cutting or the programming?
The cutting. The blade is cut to the lock, or to code from the vehicle where no key is available to copy. A laser-cut blade costs more than a stamped one because the machine and the blank both cost more. On most cars this is the smaller half of the bill, and car key cutting on its own produces a key that opens the doors and nothing else.
The programming. The key is written into the immobiliser so the engine will start. This is the larger half, it varies more by make than anything else on the quote, and it is the part no high-street machine can skip.
A quote covers the blank, the cutting, the programming and the visit as one figure. Anything quoted as a part price alone is not a working key, which is worth remembering when comparing a number on this page against a number on a marketplace listing.
Why are car keys so expensive?
Three reasons, and the first one explains most of it.
A car key is a security device rather than a piece of metal. What is being bought is permission to start a vehicle, and the price reflects the system built to make that permission hard to obtain. The metal costs almost nothing.
The equipment and the data behind it are the real expense. Both are bought per manufacturer rather than once, and both are renewed rather than owned outright, which is why a key for one make costs more than the same shape of key for another.
Access is restricted deliberately. Manufacturers gate key work, and each year of new models tends to gate it a little further. That is the same design decision keeping the car difficult to steal, and it is doing its job when it makes a key difficult to copy.
Where can a spare key be made?
A main dealer. Covers every vehicle without question, which is the one thing it holds over the alternatives. The car goes to them, the timescale runs in days rather than hours, and it is the most expensive of the three routes.
A high-street key counter. Cuts and codes many ordinary keys over the counter, and it suits a spare precisely, because the route needs a working key to copy from. Two limits are worth knowing before setting off. The car has to be brought within reach of the shop, and the newest or most restricted vehicles are not covered.
A mobile auto locksmith. Both steps happen at the vehicle, wherever it is parked, and nothing has to be driven anywhere. It is also the only one of the three that still helps if the spare is left too late, because car key replacement with no working key is the same visit with a longer job inside it.
How much does the make and model change it?
More than most people expect, and less than the headline figures suggest. Three bands cover almost every car on a Worthing driveway.
Ordinary hatchbacks and superminis sit at the bottom. The keys are common, the routes are open and the equipment is well-trodden, so a spare lands near the lower end of its type band.
Family cars and most vans sit in the middle, usually because the remote and the chip are coded as two operations rather than one. Van key replacement follows the same pattern, with the generation of the van deciding where in the band it falls.
Premium and recent models sit at the top, because access is restricted and the equipment is specialist. This is where the gap between makes becomes obvious, and it is the reason a general figure is only ever a starting point.
The registration settles it exactly, in about a minute, which is more use than a table of twenty makes to find yourself in.
When does a spare actually save money?
The arithmetic is short. A spare on an ordinary car costs somewhere between £120 and £250 today. The same car with no key left costs roughly double, plus recovery if it cannot be driven, plus whatever the hour adds when it happens at six in the morning rather than on a Tuesday afternoon.
Three situations turn that from arithmetic into something worth acting on.
- A car that has only ever had one key, which is most used cars after a few owners
- A used car bought recently, where nobody has confirmed how many keys the vehicle still recognises
- A household sharing one key between two drivers, where losing it stops two people rather than one
The timing is the only part that matters. The cheapest day to buy a spare is any day the original still works. The most expensive is the day it stops, and that day tends to pick itself, which is what 24 hour emergency auto locksmith cover exists for.
Is a cheap key bought online a saving?
Sometimes, and it is worth being straight about when.
A key blank or a remote shell bought online is genuinely cheap, and for swapping a cracked case onto a working fob it is a real saving. A replacement key fob supplied and coded together is the alternative when the electronics inside have failed rather than the shell.
What the online figure leaves out is the rest of the job.
- The blade still has to be cut to the vehicle
- The key still has to be programmed before the engine starts
- An unbranded chip is not always accepted, and some makes reject them outright
That last one is where the saving disappears. A key the car refuses has still been paid for, and the visit that establishes it was the wrong part is not free either.
The reasonable position is simple enough. Buying the part separately works when the part is right for the vehicle, and the registration is what settles that before anything is ordered rather than after it arrives.
What to have ready for a spare key
Four things turn a spare key into a twenty-minute job at the kerb.
Documents are the one item people forget, and proof of ownership sets out exactly what is accepted and what to do when the logbook has gone missing.