A small extra payment does more than it looks.
Extra money goes entirely to principal, so it stops interest accruing on that amount for every remaining month. At high rates the effect is large: on $2,000.00 at 89%, an extra $50.00 a month removes about $5,650.53 of interest and 44 months.
StraightSum · Educational estimate
Payoff accelerator
| Balance | $2,000.00 |
| APR | 89% |
| Current payment | $150.00 |
| Payoff at current payment | 63 months |
| Interest at current payment | $7,450.00 |
Generated
Estimate for educational use. Not an offer of credit and not financial advice. StraightSum is not a lender. Verify all figures against the lender's written Truth in Lending disclosure before signing.
Payoff accelerator
What you still owe today, not the original amount.
From the lender's disclosure or your statement.
What you pay each month right now.
At $150.00 a month
Clear in
63 months
5.3 years
Interest paid
$7,450.00
Total paid
$9,450.00
| Pay extra | New payment | Clear in | Months saved | Interest saved |
|---|---|---|---|---|
| +$10 | $160.00 | 37 mo | 26 | $3,577.59 |
| +$25 | $175.00 | 27 mo | 36 | $4,831.54 |
| +$50 | $200.00 | 19 mo | 44 | $5,650.53 |
| +$100 | $250.00 | 13 mo | 50 | $6,288.49 |
| +$200 | $350.00 | 8 mo | 55 | $6,735.06 |
Worth aiming at
An extra $10 a month saves $3,577.59 and 26 months.
That is $10 a month for 37 months — a total of $370 committed, removing $3,577.59 of interest. The reason it works out favourably is that the extra goes entirely to principal, so it stops interest accruing on that amount for the whole remaining term.
Why a small extra payment does so much
Your scheduled payment covers interest on the current balance first; only what remains reduces principal. Anything extra bypasses that entirely and goes straight to principal — which means interest stops accruing on it for every remaining month of the term. At 89% APR, a dollar of principal removed today saves roughly 7.4 cents every month it would otherwise have been outstanding. That compounds in your favour, which is the one place in consumer lending where compounding usually does.
Before you start, two things to confirm with the lender
- Is there a prepayment penalty? Many lenders have none, but some charge for early repayment, which changes the arithmetic above entirely.
- Will extra money go to principal? Some servicers apply overpayments to the next scheduled payment instead, which gives you a payment holiday rather than a saving. Say in writing that it should be applied to principal.
Educational estimate. Assumes a fixed rate, payments applied to principal, and no prepayment penalty. Real servicing varies — confirm how overpayments are handled before relying on these figures, and check your actual balance and rate against your statement.
Highest rate, regardless of balance.
Two approaches get recommended. One saves more money; the other is easier to sustain. Both are defensible, and the difference is worth understanding before choosing.
Highest APR first
Minimums on everything, and every spare dollar at the most expensive debt. This saves the most in interest, mathematically, without exception — because interest is indifferent to which balance feels more satisfying to close.
The drawback is that the most expensive debt is often not the smallest, so it can take a long time before anything visibly disappears. That is a real cost, just not a financial one.
Smallest balance first
Clear the smallest debt, then roll its payment into the next. It costs more in interest than the avalanche — sometimes considerably — but each closed account is visible progress, and progress you can see is progress you are more likely to continue.
If the avalanche is the plan you will abandon in month four, the snowball is the better plan. A method you follow beats a method you admire.
Making it actually happen
- 01Check for a prepayment penalty firstOne line in the agreement. Most lenders have none, some charge, and it changes whether any of this is worth doing.
- 02Tell the servicer in writing to apply extra to principalOtherwise some will credit it toward your next scheduled payment, which gives you a month off rather than a saving. Then check the next statement to confirm the balance moved.
- 03Automate the extra amountA separate standing transfer on payday is far more reliable than a monthly decision. Decisions get skipped in difficult months; transfers do not.
- 04Start smaller than feels ambitiousAn extra $25 sustained for a year removes more interest than $100 abandoned after two months. The ladder above shows that even the smallest step is not negligible.
- 05Redirect the payment when a debt clearsRoll the whole payment — minimum plus extra — onto the next debt rather than absorbing it back into spending. This is where both methods generate most of their momentum.
That is arithmetic, not a failing.
If the current payment barely covers accruing interest, the balance holds or grows no matter how disciplined you are. At triple-digit rates this happens easily, and it is a property of the loan rather than of the borrower.
The step that helps most at that point is free: an NFCC-affiliated nonprofit credit counsellor can often renegotiate rates and terms with lenders directly, and their initial consultation generally costs nothing. It is the step people take last and most often wish they had taken first — and it pays us nothing, which is worth stating given what the rest of this site earns from.
Questions about paying off early
Does paying extra on a loan actually save money?
Yes, and usually more than people expect. An extra payment goes entirely to principal, so it stops interest accruing on that amount for every remaining month of the term. On $2,000.00 at 89% APR with a $150.00 monthly payment, adding $50.00 a month clears the balance 44 months sooner and removes about $5,650.53 of interest.
Should I pay extra, or save the money instead?
It depends on the rate, and at the rates common in small-dollar lending the answer is usually clear. Paying down a balance at 89% APR is equivalent to a guaranteed 89% return, which no savings account approaches. The exception is an emergency fund: if you have no buffer at all, a small one is worth building first, because the alternative to a buffer is borrowing again at the same rate the next time something breaks.
Which debt should I pay extra on first?
The one with the highest APR, regardless of balance size. This is the avalanche method, and it saves the most money because interest does not care which debt feels more satisfying to close. Some people do better clearing a small balance first for the motivation — that is the snowball method, it costs more in interest, and if it is the approach you will actually sustain then it is the better one for you.
Will my lender apply the extra to principal?
Not automatically, and this catches people out. Some servicers apply an overpayment to the next scheduled payment instead, which gives you a month off rather than a saving — the balance and the interest accruing on it are unchanged. State in writing that extra funds should be applied to principal, and check the next statement to confirm they were.
Is there a penalty for paying off a loan early?
Many lenders have none, but some charge a prepayment penalty, and it is a single line in the agreement. Find it before you start. Where early repayment is free, it is often the cheapest financial decision available to you — and where it is not free, the fee has to be weighed against the interest saved.
What if I cannot pay extra at all?
Then this calculator is telling you something worth knowing rather than nothing. If the current payment barely covers interest, the balance will hold or grow, and that is arithmetic rather than a personal failing. An NFCC-affiliated nonprofit counsellor can often renegotiate the terms, usually free for the initial consultation — a materially better step than borrowing again to cover the shortfall.
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Calculators and guides on this site are educational estimates, not offers of credit and not financial, legal, tax, or credit advice. Actual terms depend on the lender, your state, verification, underwriting, and applicable law. StraightSum is not a lender, loan broker, or credit services organization. We do not make credit decisions, issue funds, set rates or fees, guarantee approval, or service loan accounts.