Cat S vs Cat N: the real differences

Structural versus non-structural write-offs compared: cost to return to the road, resale discounts, insurance, finance and which one to buy first.

BASICS · 3 min read

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The one-line version

S is Structural, N is Non-structural. An S gets a new V5C logbook with the category recorded on it. An N can keep its existing logbook. After repair, both need an MOT, tax and declared insurance.

Cost to return to the road

The DVLA side is cheap for both. A Cat S logbook on form V62 is free with the new keeper slip and £25 without, per GOV.UK, and there has been no DVLA inspection since the Vehicle Identity Check scheme closed in 2015. The real extra cost of a Cat S is the structural repair itself, done on a jig by a bodyshop that can measure the shell, plus the engineer's report insurers and buyers will want.

Resale discount

Broad Cat N and Cat S discount ranges are policy assumptions, not verified prices for a specific car. The Analyzer applies the selected category to matched asking-listing evidence and shows the haircut. Check the category, sources and condition before relying on the range.

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Insurance and finance

Both markers must be declared forever. Most lenders won't finance a Cat S for your buyer, which shrinks the buyer pool. That is one more reason S discounts run deeper.

Which to buy

Beginners should start with N. If you have a bodyshop relationship or your own jig, S can be far more profitable, because the auction discount often overshoots the true repair cost on light structural hits. That gap is where the A-grade deals hide.

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