A written-off car can be a genuinely good buy or an expensive mistake, and the difference is almost never the category on the paperwork. It is what caused the damage and how well it was put right.

If you have bought one that cannot be driven home, DK’s Recovery moves vehicles across Sheffield and beyond — see vehicle transportation. Call 07867 860723.

The four categories

Category A — scrap only. The entire vehicle must be crushed, including every part. Never legally on the road again.

Category B — the body shell must be destroyed, but serviceable parts may be reclaimed and resold. Also never returns to the road as a vehicle.

Category S — structural damage that is repairable. The chassis, frame or crumple structure was affected. Can return to the road once properly repaired and re-registered.

Category N — non-structural damage that is repairable. Can return to the road.

Why “non-structural” is not the same as “minor”

This is the most useful thing to understand. Category N does not mean light damage — it means the damage was not structural. A car written off by flood water, by an electrical fire, or by cosmetic damage that simply cost more than an old car was worth, is all Category N.

Flood damage in particular is Category N and is one of the harder things to buy safely, because the faults surface months later in corroded connectors and control modules.

Meanwhile a Category S car with a straightforward, properly repaired impact can be entirely sound. So the category tells you where the damage was, not how bad it was, and certainly not how well it was fixed.

What to actually check

  • What caused it. Ask directly, and ask for photographs of the damage before repair. A seller who has them is a better prospect than one who does not.
  • Who repaired it, and to what standard. Invoices, parts receipts, whether a bodyshop or a driveway.
  • Panel gaps and paint match in daylight, from several angles.
  • Tyre wear across each tyre — uneven wear after a structural repair suggests the geometry was never corrected.
  • An independent inspection. An HPI check confirms the category; it says nothing about the quality of the work. On a Category S car this is money well spent.

Insurance is the surprise people get

Most insurers will cover a Category S or N vehicle. Not all will, some charge more, and a few restrict what cover they offer.

Get a quote on the specific registration before you commit. Discovering afterwards that your usual insurer will not touch it, on a car you have already paid for, is the most common way one of these purchases goes wrong.

What it does to resale

The marker is permanent. Expect commonly a fifth to a third less than an equivalent clean car, and expect a smaller pool of buyers when you sell.

That is not an argument against buying one — it is the whole reason the discount exists. It is an argument for buying to keep rather than buying to flip.

Getting it home

Plenty are sold unrepaired, or repaired but without a current MOT. An untested car cannot be taxed, and an untaxed car cannot legally be driven — so transport is usually part of the purchase rather than an optional extra.

Before agreeing a price, check whether it rolls, steers and comes out of gear. Those three answers decide how straightforward it is to load. The full detail is in moving a car with no MOT or tax.

Common questions

What is the difference between Cat S and Cat N?

Category S means structural damage that has been repaired or can be – the chassis, frame or crumple structure was affected. Category N means non-structural damage, though that can still be substantial: electrical faults, water damage, or cosmetic work that simply cost more than the car was worth.

Are Cat S and Cat N cars legal to drive?

Yes, once repaired and, for Category S, re-registered with the DVLA. Both can legally return to the road. Categories A and B cannot – A must be crushed entirely, and B allows parts to be salvaged but the shell must be destroyed.

Will insurers cover a Cat S or Cat N car?

Most will, but not all, and some charge more or restrict cover. Get a quote on the specific registration before you buy rather than after. It is the single most common unpleasant surprise with these purchases.

How much less is a written-off car worth?

Commonly somewhere between a fifth and a third less than an equivalent clean car, and the marker stays on the record permanently. That discount is why they are attractive to buy and why they are harder to sell on.

What should I check before buying one?

The category and what actually caused it. Ask for the repair invoices and photographs of the damage before repair. Get an independent inspection – an HPI check tells you the category but not the quality of the work, and poor structural repair is the real risk.

Can I drive a Cat S or Cat N car home from the sale?

Often not. Many are sold unrepaired or without a current MOT, and an untested car cannot be taxed. Budget for transport as part of the purchase rather than assuming you will drive it away.

Bought a Cat S or Cat N car?

Tell us where it is and whether it rolls. 07867 860723.

At the other end of the same subject, if a vehicle is genuinely finished, scrapping it properly is about the paperwork rather than the car — and getting that wrong keeps you liable for it for years.