How to Use the Personal Loan & Car Finance Calculator

The free Personal Loan & Car Finance Calculator estimates monthly payments, total interest and the real cost of borrowing — whether you take a personal loan, a hire-purchase agreement, or a PCP deal with an optional balloon. Switch modes to compare the same car side by side, then use the chart and schedule to see how each payment splits between interest and principal.

Step-by-Step Guide

1. Choose a deal type

Personal loan: a fully amortising loan. After the last instalment you own the asset and owe nothing more.
Hire Purchase (HP): dealer finance that also amortises to zero. You usually pay a small option-to-purchase fee and then own the car.
PCP: you repay the depreciation plus interest. A guaranteed future value (balloon) is deferred to the end. Monthly payments look lower; you only own the car if you pay that balloon (or refinance).
Compare: runs all three on the same price, deposit, APR and term so the cheap-monthly / expensive-overall trade-off is visible.

2. Enter the deal

Cash / vehicle price and any deposit or trade-in. If the old car still has finance, put the outstanding balance in Amount owed on trade-in.
APR: the quoted annual rate. This tool compounds it monthly. A “flat rate” in a dealer advert is not APR and usually understates the true cost.
Term in months (typical car finance is 24–48; personal loans often 12–60; this tool allows up to 84).
Fees: arrangement fees can be paid upfront or rolled into the loan. HP/PCP often add an option-to-purchase fee at the end.
PCP balloon slider: set guaranteed future value as a percentage of cash price (or type the amount). 40–55% is a common range for 36–48 month deals.
Mileage: if you expect to drive more than the PCP contract allows, excess miles are added to the hand-back cost.
Overpayments: extra monthly or one-off amounts cut interest and term on personal loans and HP.

3. Read monthly vs real cost

Results update as you type. The highlighted figure is the contractual monthly instalment (including any regular overpayment you entered). “Total amount payable” is what you send the lender if you keep the asset: instalments + balloon + option fee + rolled-in fees. For PCP, the insight box also shows the cheaper path if you hand the car back — plus any estimated excess-mileage bill.

Standard instalment: M = P × r(1+r)ⁿ / ((1+r)ⁿ − 1)

For PCP, P is not the full amount financed. The balloon is discounted back to today and only the depreciating slice is amortised, which is why the monthly figure drops while total interest may not.

4. Use the chart and schedule

The chart plots remaining balance against cumulative principal and interest. On PCP a marker shows the balloon still due at the end. Switch the table between yearly totals and a month-by-month amortisation. In Compare mode the table shows year-end balances for all three structures.

Common Scenarios & Examples

Scenario: Personal loan for a used car

Goal: See the true cost of borrowing $10,000 over 36 months rather than looking only at the monthly figure.

Select Personal loan and your currency (e.g. USD).
Set Cash / vehicle price to $10,000, deposit and trade-in to 0.
Enter 8.9% APR and 36 months.
Leave fees and overpayments at 0, then read Monthly payment, Total interest and Total amount payable.

Sample inputs:

Amount financed: $10,000
APR: 8.9% · Term: 36 months

Approximate results: Monthly ≈ $318 | Total interest ≈ $1,430 | Total payable ≈ $11,430

Scenario: Hire Purchase vs cash price

Goal: An $18,000 car with a $2,000 deposit over 48 months at 9.9% APR.

Choose Hire Purchase.
Price $18,000, deposit $2,000, APR 9.9%, term 48 months, option-to-purchase fee $10.
Note amount financed ($16,000) and that the schedule falls to zero — you own the car after the last payment plus the option fee.

Approximate results: Monthly ≈ $406 | Total interest ≈ $3,500 | Cash out the door to own ≈ deposit + instalments + option fee

Scenario: The PCP “cheap monthly” trap

Goal: Same car as above, but with a 45% balloon, to see why PCP can cost more if you keep the vehicle.

Switch to PCP or Compare.
Leave price, deposit, APR and term unchanged.
Set the balloon slider to 45% of price (here $8,100).
Compare monthly payment with HP, then compare cost if you keep versus cost if you hand back.
Raise expected mileage above the agreed allowance to see excess-mile charges appear on the hand-back total.

Typical pattern: PCP monthly is materially lower than HP, but if you pay the balloon to keep the car the total interest is often similar or higher. You do not own the car unless that final payment is made.

Disclaimer & Limitations

Not professional advice: this calculator is an estimation and education tool. It is not an offer of credit and does not replace a lender illustration or advice from a qualified adviser. Actual APR, fees, GFV and underwriting depend on credit profile, vehicle and dealer.

Assumptions: the entered rate is treated as APR compounded monthly. Payments are assumed in arrears. Fees are either paid upfront or added to principal if you tick “roll fees in”. PCP excess mileage is a simple estimate (extra miles × rate) and ignores condition, fair-wear and early-termination charges. Insurance, road tax, servicing, GAP and payment protection are not included unless you fold them into price or fees yourself.

Flat rates: some HP adverts quote a flat rate of interest. That is not APR. Enter the APR from the pre-contract credit information whenever you have it.

Bug Reports and Suggested Improvements

Please email suggestions and bug reports to: personalloancarfinancecalc@personalfinances.me, thank you.

Personal Loan & Car Finance Calculator – Monthly Payments, PCP & HP

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📅 Year-by-Year Breakdown