Loan Calculator

How Loans Work: APR, Interest Rates & Terms

When you borrow money via a personal loan, you pay back the principal amount plus interest and fees. The interest rate is expressed as APR (Annual Percentage Rate), which includes interest plus fees, giving you the true cost of borrowing. Understanding how to calculate your monthly payment and compare different loan terms helps you find the cheapest way to borrow.

APR vs Interest Rate

Interest Rate: The base rate of interest charged on your loan. A 6% interest rate means you pay 6% of the loan amount per year as interest.

APR (Annual Percentage Rate): The interest rate plus all fees and charges, expressed as an annual percentage. APR gives you the true total cost of borrowing. When comparing loans, always compare APR, not just the headline interest rate.

How Monthly Payments Are Calculated

Monthly payments are calculated using the amortisation formula: M = P[r(1+r)^n]/[(1+r)^n-1], where:

• M = Monthly payment
• P = Principal (loan amount)
• r = Monthly interest rate (annual APR ÷ 12)
• n = Number of monthly payments (term in months)

A £10,000 loan at 6.9% APR over 60 months costs £194.18/month. The same loan over 48 months costs £232.46/month but saves £1,053 in total interest.

Understanding Loan Fees

Arrangement Fee: A one-off charge by the lender for setting up the loan, typically 1-3% of the loan amount. This fee is included in your APR calculation, so it's already factored into the monthly payment.

Early Repayment Charges: Some loans penalize you for paying off early. Check your loan terms before overpaying.

Payment Protection Insurance (PPI): Optional insurance that covers your payments if you become unemployed or ill. Usually £20-50/month. Many PPI policies were mis-sold—check if you've been overcharged.

Types of Loans

Unsecured Personal Loans: Not backed by collateral. Interest rates are higher (4-15% APR). The lender relies on your creditworthiness.

Secured Loans: Backed by an asset (e.g., your home). Interest rates are lower (3-8% APR) because the lender can repossess the asset if you don't pay. However, defaulting on a secured loan can result in losing your home.

Car Finance: Specific to car purchases. Use our Car Finance Calculator for PCP (Personal Contract Purchase) vs HP (Hire Purchase) comparison.

Debt Consolidation Loans: Combine multiple debts into one loan. Lower interest rate (e.g., 6% vs 18% on credit cards), but requires discipline to avoid new debt.

How to Get the Cheapest Loan

• Check Your Credit Score: Excellent credit (740+) gets the best rates. Fair credit (600-700) pays higher rates. Check your credit file for errors.
• Borrow Less: Smaller loans have lower interest rates. Borrow only what you need.
• Shorten the Term: Paying off in 36 months instead of 60 costs less total interest, but monthly payments are higher.
• Shop Around: Compare APR from multiple lenders. Don't accept the first offer. Many lenders give indicative rates—get exact quotes.
• Avoid Fees: Some lenders charge £0 arrangement fee. Factor fees into your APR comparison.
• Consider a Guarantor: Having someone guarantee your loan can lower the APR if your credit is poor.
• Use Comparison Sites: MoneyHelper, Moneysupermarket, and others show rates from multiple lenders.

How to Use This Calculator

1. Enter the loan amount (how much you want to borrow).
2. Enter the APR (check your lender's quote for the exact rate).
3. Choose the loan term in months (24, 36, 48, 60 months are common).
4. Optionally, enter any arrangement or setup fees.
5. Click "Calculate Loan Payment" to see your monthly payment and total interest.
6. Review the comparison table to see how different terms affect your payment.

Making Payments Faster

If your loan allows overpayments without penalty, paying extra each month saves significant interest:

• £10,000 loan at 6.9% over 60 months = £194.18/month, £1,650 total interest.
• Adding £50/month overpayment shortens the term to ~44 months and saves £550 in interest.

Financial Disclaimer: This calculator provides estimates only and does not constitute financial advice. Actual loan payments may vary based on credit score, fees, and individual lender terms. Always seek independent financial advice before taking out a loan.