Which invoices and proof to keep (and why it matters)

When you sell a car, buyers don’t want stories — they want evidence. Clear invoices and dates reduce doubt, reduce back-and-forth, and usually reduce price haggling.

Keep these no matter what

• Routine service: oil + filters, plugs, belts, fluids, brake fluid.
• Big-ticket work: timing belt/chain, clutch, turbo-related repairs, injectors, DPF/EGR, automatic transmission service.
• Safety items: brakes, tyres, alignment, suspension work.
• Diagnostics: scan reports, test results, inspection documents.
• Accident/insurance repairs: what happened, what was replaced, and when.

Nice to have

• Parts receipts for DIY repairs (especially for important parts).
• Invoices for upgrades (tow bar, wheels, audio, alarm).
• Seasonal work (A/C service, rust protection).

How long should you keep them?

Simple rule: keep important invoices for as long as you own the car — and ideally a while after selling (to avoid disputes). Digital files are cheap to store, and they add real value when you sell.

How to keep it organized

• Use one naming format: YYYY-MM-DD_mileage_shop_amount.pdf
• No invoice? Record date + mileage + what was done and add photos of parts.
• Don’t rely on “I’ll sort it later”. You won’t.