Last updated: 5 July 2026
Car Finance Compensation Calculator (Illustrative)
Our calculator estimates illustrative overpaid interest vs a fair-rate benchmark, adds simple statutory-style interest for context, and shows a non-binding total. If you want to check your general eligibility rules first, see our [Eligibility Checklist](/topics/car-finance-mis-selling-compensation-eligibility).
Calculating Your Unfair Car Finance Redress: The Official Math
The standard calculation compares the interest rate you paid with the interest rate you would have paid without the Discretionary Commission Arrangement. For example, if you paid 9% but the base rate set by the lender was 4%, the overpayment markup is 5%. Recalculating the loan at the base rate yields the principal overcharge amount (e.g. £1,100 on a typical family car loan). This formula isolates the exact cost of the hidden dealer markup.
Method 1 vs. Method 2: Hybrid Remedy vs. Full Commission Refund
The proposed FCA redress scheme outlines two main calculation methods. Method 1 (Full Commission Refund) returns the entire broker commission to the customer if the secret commission exceeded threshold limits or was completely hidden. Method 2 (Hybrid Remedy) averages the estimated interest loss (using a 17% or 21% APR reduction rule of thumb) and the commission paid, establishing a fairer redress baseline.
Statutory 8% Compensatory Interest: How Time Accrues Value
Because you were deprived of the overpaid money for years, regulators award 8% simple interest per year on the overcharge. If your agreement ended 5 years ago, this adds 40% (8% x 5 years) directly to your base refund subtotal, meaning older claims generate substantially larger payout figures.
Illustrative Worked Example of a Car Finance Compensation Formula
Imagine you bought a £15,000 car on PCP in 2018. Over the 4-year term, you paid £3,200 in total interest and the dealer received £1,000 in secret commission. 1. Base refund: averages the 17% interest loss (£544) and actual commission (£1,000), which equals £772. 2. Compensatory interest (8% per year over 6 years): £772 x 0.08 x 6 = £370.56. 3. Total illustrative payout: £772 + £370.56 = £1,142.56.
High Commission Thresholds for Non-Discretionary Agreements
In cases where a DCA was not active but the dealer was paid an unfairly high commission, the FCA has proposed refunding the portion of the commission that exceeded a reasonable benchmark (e.g., commissions exceeding 10% of the loan value or a 39% cost-of-credit threshold). This ensures drivers are protected even in fixed-commission structures.
Understanding the Broader Regulatory Framework and Volume Commission
In addition to the primary elements detailed above, consumers must understand the wider regulatory context of the UK motor finance market. Over the past two decades, dealer-arranged vehicle finance has grown to represent over 90% of all private car purchases in the United Kingdom. This rapid expansion created an environment where volume-driven commission structures became the primary profit driver for many automotive dealerships. Lenders competed fiercely for dealer partnerships by offering increasingly flexible discretionary commission arrangement terms, which directly resulted in inflated retail interest rates for everyday consumers who were unaware that a cheaper base rate existed. When the Financial Conduct Authority began investigating the sector, mystery shopping exercises revealed that less than 10% of dealerships proactively disclosed the presence or value of finance commissions to buyers. This lack of transparency violated core principles of treating customers fairly and created a severe imbalance in negotiating power. As the current legal disputes and Upper Tribunal challenges proceed, the regulator is working to ensure that any final redress framework holds lenders fully accountable for these historical practices, restoring trust and transparency to the consumer credit industry. Motorists must also be aware that the Financial Ombudsman Service has already ruled in favor of consumers in several key test cases, establishing that hidden commission markups breach standard fiduciary duties. By submitting your complaint directly to your lender today, you establish an official paper trail that protects your claim against any future statutory time limits. The combination of regulatory audits, consumer advocacy campaigns, and legal precedents has shifted the power dynamic back to motorists, providing a clear path to financial justice. Furthermore, when assessing motor finance mis-selling, regulators analyze the exact relationship between the dealer, acting as a credit broker, and the finance provider. Under the Consumer Credit Act, the finance provider is typically held jointly and severally liable for any misrepresentations or breaches of duty committed by the dealer during the sale. This legal mechanism, established to protect consumers in hire purchase transactions, ensures that motorists have a direct right of recourse against the bank or financial institution rather than having to pursue a potentially insolvent or defunct dealership.
Frequently asked questions
- Is this the official FCA calculator?
- No. It is an independent educational tool. Official redress calculations will follow FCA final rules.
- Do all calculators show the same estimate?
- No, because base rates and commission rates differ by lender. Treat all online calculator estimates as illustrative guides only.
- Do I need my contract APR to use the calculator?
- It helps, but if you don't have it, our calculator uses standard industry averages for the year of purchase to estimate your potential refund.
- Will statutory interest be taxed?
- Under UK tax law, statutory interest paid on compensation is subject to income tax. Lenders usually deduct basic rate tax (20%) automatically before sending your payout.
Ready to Claim Your Motor Finance Refund?
Don't let Claims Management Companies (CMCs) take 30% of your payout. Calculate your potential discretionary commission refund and generate a legal-grade complaint letter in 60 seconds.