Purpose: See how much an extra payment on a loan really saves, spot the cases where it doesn't pay, and decide whether the money is better used somewhere else.
Paying off a loan early feels like the responsible thing to do, and often it is. But "often" isn't "always". A prepayment fee, a very cheap loan or a missing emergency fund can turn a good habit into a poor trade. The numbers below show where the line is.
Where your payment goes
Most car loans, personal loans and mortgages are repaid in equal monthly instalments. Each instalment pays the interest for that month first, and only the rest reduces what you owe. Because the balance is highest at the start, the first payments are the most interest-heavy.
- €20,000 car loan at 8% over 5 years: the payment is €405.53. The first one is €133.33 interest and €272.20 principal.
- €200,000 mortgage at 5% over 25 years: the payment is €1,169.18. The first one is €833.33 interest and only €335.85 principal.
An extra payment goes entirely to principal. Every euro of it stops charging interest for the rest of the loan, which is why extra payments early in the loan save the most.
What an extra payment saves
The same €20,000 car loan at 8% over 5 years, with a fixed extra amount every month:
| Monthly payment | Paid off in | Total interest | Saved | |
|---|---|---|---|---|
| No extra | €405.53 | 60 months | €4,331.62 | – |
| + €100/month | €505.53 | 47 months | €3,295.25 | €1,036.37 |
| + €200/month | €605.53 | 38 months | €2,665.81 | €1,665.81 |
An extra €100 a month saves €1,036 in interest and finishes the loan 13 months sooner. Double it and you save €1,666 and finish 22 months sooner.
The saving grows with the interest rate and with the time left on the loan. On a €10,000 loan at 2% over 2 years, an extra €200 a month saves only €65, because there's little interest to save in the first place.
Try your own loan:
The nominal rate from the offer, not the APR. Add the fees below to see the APR.
One-off costs taken at the start: arrangement, disbursement, valuation.
Costs paid with every instalment: account fee, mandatory insurance.
Optional fee applied to the principal you pay off early.
Fixed for 60 months
First payment: $272.20 principal + $133.33 interest
Total Repaid: $24,331.62
on $20,000.00 principal
Interest rate 8% → APR 8.3%. This isn't an extra cost: you're still charged 8% a year. With no fees, the APR is higher only because of how it is calculated: it counts that you pay interest every month, not once a year.
Standard payoff
Original schedule total: $24,331.62
With extra payments
Accelerated total: $24,331.62
The table below follows the accelerated path to zero and includes any early repayment fee.
* This is a mathematical estimate. Record actuals in Volora to track real-world progress.
Check for a prepayment fee first
Some loans charge a fee on the principal you repay early, usually a percentage of the extra amount. Whether it matters depends on how much interest the extra payment saves.
On the car loan above, a 1% fee on the extra €100 a month costs €46 in total. You still save €990. Worth it.
On a cheap, short loan it can go the other way. A €10,000 loan at 2% over 2 years, with an extra €200 a month and a 3% fee:
| Amount | |
|---|---|
| Interest saved | €65.46 |
| Prepayment fee | €96.00 |
| Result | €30.54 more expensive |
Here the fee costs more than the interest you save. You'd finish 8 months sooner but pay €30.54 more in total. The Loan Payoff Optimizer flags this case when you enter the fee.
Fees and their limits differ by lender, loan type and country, and some contracts allow a fee-free amount each year. Read the early repayment section of your contract, or ask the lender, before you start.
Pay down the loan, or use the money elsewhere?
An extra payment "earns" exactly the loan's interest rate, with no risk. That's the number to compare against. A sensible order:
- Emergency fund first. Money paid into a loan is hard to get back. If the car breaks down, you can't ask the bank to return your extra payments. Keep a few months of expenses in cash first: Building an Emergency Fund.
- Most expensive debt next. A credit card at 24% doubles an unpaid balance in about 3 years (see the Rule of 72). Clear it before you overpay a car loan at 8%.
- Then compare rates. If the loan costs more than your savings would earn after tax, paying it down wins. If it costs less (a 2% loan while a savings account pays 4%), keeping the money and saving it is usually better.
- Don't give up free money. If your employer or the state tops up retirement contributions, skipping that to overpay a cheap loan rarely makes sense.
Rule of thumb: an extra payment is a guaranteed return equal to the loan's interest rate. The higher the rate, the harder it is to beat.
Shorter loan or smaller payment?
When you make a larger one-off repayment, some lenders ask whether to shorten the term or lower the monthly payment.
- Shorter term: the payment stays the same, so more of it keeps going to principal. This saves the most interest.
- Lower payment: less interest saved, but more breathing room each month. Useful if the budget is tight or your income is uncertain.
If you choose the lower payment, consider keeping the old amount as a regular extra payment. You get the bigger saving but can stop any month.
How it fits into Volora
In Volora, a car loan, personal loan or mortgage is a wallet of its own. Enter the outstanding balance and the term, and Volora projects the monthly payment over the remaining term. The loan counts as debt in your net worth, and Total Wealth shows the yearly cost of your debts and how many months they'll take to repay. After an extra payment, update the balance and you'll see the effect. More on the net worth tracker.
Quick checklist ✅
- Build an emergency fund before you overpay any loan.
- Pay off the most expensive debt first, usually credit cards.
- Read the contract's early repayment section: is there a fee, and is any amount fee-free?
- Compare the loan's rate with what the money would earn after tax.
- Run your numbers in the Loan Payoff Optimizer, with the fee if there is one.
- Prefer a shorter term over a lower payment if your budget allows it.
This post is general guidance, not financial advice.