Key takeaway: The free CarCostCheck report is always worth running. It costs nothing, takes seconds, and can save you thousands. The £4.99 premium check is worth adding whenever you are buying from a private seller or spending more than £1,000. At £4.99, it is the cheapest car insurance you will ever buy.
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When a Car Check Is Essential
Buying from a Private Seller
Private sales carry the most risk. Unlike dealers, private sellers have no legal obligation to disclose known faults, and your consumer protection is minimal. The car is sold "as seen." A comprehensive check is essential.
Recommended: Free CarCostCheck report + £4.99 premium (stolen, finance, write-off). Total cost: £4.99.
Buying from an Online Marketplace
Cars sold on Facebook Marketplace, Gumtree, or eBay carry similar risks to private sales. You often cannot verify the seller's identity or history. Scams are more common on these platforms.
Recommended: Free CarCostCheck report + £4.99 premium. Total cost: £4.99.
Spending Over £5,000
At this price point, the risk justifies thoroughness. A £4.99 check that prevents a £5,000 loss is a 1,000:1 return on investment.
Recommended: Free CarCostCheck report + £4.99 premium + professional inspection (£100-200). Total cost: £105-205.
When a Free Check May Be Enough
Buying from a Franchise Dealer
Franchise dealers (official brand dealers) typically run their own checks and offer warranties. The risk of stolen or financed vehicles is low. However, the free CarCostCheck report is still valuable for understanding MOT history, upcoming maintenance, and running costs.
Recommended: Free CarCostCheck report (to understand running costs and condition). The £4.99 premium is optional but adds extra confidence.
Cars Under £1,000
For very cheap cars, the free check helps you understand what repairs are coming and whether the car is mechanically sound. The £4.99 premium is still worthwhile if you want to verify the car is not stolen, but at this price point many buyers accept more risk.
Recommended: Free CarCostCheck report at minimum. £4.99 premium is good practice but optional.
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Browsing and Shortlisting
When you are in the early stages of car shopping and comparing multiple options, the free check is perfect. Run it on every car you are considering to compare reliability, running costs, and MOT history. Save the £4.99 premium for the car you decide to buy.
Recommended: Free CarCostCheck report on every car you are considering.
What the Free Check Catches
The free CarCostCheck report catches problems that even the £19.99 paid services miss:
- A car with £1,500 of MOT advisories that need attention soon
- Mileage that has been clocked (detected through year-on-year MOT analysis)
- A reliability score of 40/100 that screams "walk away"
- Annual running costs that make the car unaffordable
- Structural advisories that suggest previous accident damage
- Patterns of neglect (repeated MOT failures, ignored advisories)
None of these would appear in a typical £19.99 car check. They only tell you about stolen, finance, and write-off status.
Cost vs Risk Matrix
| Situation | Risk Level | Recommended Check | Cost |
|---|---|---|---|
| Private sale, £5,000+ | High | Free + Premium + Inspection | £105-205 |
| Private sale, £1,000-5,000 | High | Free + Premium | £4.99 |
| Private sale, under £1,000 | Medium | Free (Premium optional) | £0-4.99 |
| Independent dealer | Medium | Free + Premium | £4.99 |
| Franchise dealer | Low | Free (Premium optional) | £0-4.99 |
| Browsing/comparing | N/A | Free only | £0 |
Full Feature Comparison
| Feature | CarCostCheck Free | CarCostCheck Premium £4.99 | Typical Paid Service £19.99 |
|---|---|---|---|
| Full MOT history (every test since 2005) | ✓ | ✓ | ✗ |
| MOT advisories in plain English | ✓ | ✓ | ✗ |
| Estimated repair costs per advisory | ✓ | ✓ | ✗ |
| Mileage verification / clocking detection | ✓ | ✓ | ✓ |
| Reliability score (0-100) | ✓ | ✓ | ✗ |
| Annual running costs breakdown | ✓ | ✓ | ✗ |
| Fuel cost calculator | ✓ | ✓ | ✗ |
| Insurance group estimation | ✓ | ✓ | ✗ |
| Red flag alerts | ✓ | ✓ | ✗ |
| Common faults for make/model | ✓ | ✓ | ✗ |
| Stolen check (PNC) | ✗ | ✓ | ✓ |
| Outstanding finance check | ✗ | ✓ | ✓ |
| Write-off check (Cat A/B/N/S) | ✗ | ✓ | ✓ |
| Previous keeper count | ✗ | ✓ | ✓ |
| VIN verification | ✗ | ✓ | ✓ |
| Colour change history | ✗ | ✓ | ✓ |
| Price | Free | £4.99 | £19.99 |
Frequently Asked Questions
Do I need a car check when buying from a dealer?
The free CarCostCheck report is always worth running. It reveals MOT issues and running costs the dealer may not mention. For non-franchise dealers, add the £4.99 premium.
Do I need a check for a cheap car?
Yes. Cheap cars are more likely to have problems. The free check costs nothing and can prevent expensive surprises.
Is the free check enough?
For browsing and shortlisting, yes. When buying, especially from a private seller, add the £4.99 premium for stolen, finance, and write-off protection.
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Related reading: How to Check a Used Car Before Buying | Cheapest Car History Check UK 2026 | Full Feature Comparison