The two rates on every personal loan quote
A personal loan is unsecured, fixed-rate and fully amortising: no collateral, one payment amount, and a balance that reaches zero on the last scheduled date. What makes it different from an auto loan is the origination fee, which most online lenders charge and most banks do not.
The fee is deducted from the money wired to you, but not from the balance you repay. Borrow $15,000 with a 5% fee and $14,250 lands in your account while you make payments on $15,000. You are paying interest on $750 you never had.
That is why two rates matter. The note rate is what the payment is computed from — 11.99% in the default case, producing a payment of $394.93. The effective cost rate is the rate that equates the $14,250 you received to those 48 payments, and it is 14.77%. A 5% fee on a four-year loan adds roughly 2.8 percentage points to the cost of the money.
Under Regulation Z an origination fee is a finance charge, so the APR the lender discloses on the note should already include it and should match the effective cost rate here. Use that as your check: if the disclosed APR equals the rate you were quoted verbally and there is also a fee, something has been left out of the disclosure or the quote was the APR all along.
Payment first, then the rate that money really cost
The payment comes from the standard amortised-loan identity, M = L·r / (1 − (1 + r)−n), with r the annual rate divided by the number of payments a year and n the number of payments. It is the same formula behind the auto loan calculator and the mortgage payment calculator.
The effective rate is the harder half. You want the periodic rate ρ that satisfies net proceeds = M × (1 − (1 + ρ)^−n) / ρ — the internal rate of return on the actual cash flows. There is no algebraic solution once n exceeds four, so the calculator brackets ρ and bisects: the right-hand side falls monotonically as ρ rises, so a hundred halvings pin it down to more precision than the number deserves. Multiplying the periodic answer by the payments per year gives the annual figure.
Payment frequency changes more than the payment size. Choosing biweekly does not merely split the monthly amount in half. The periodic rate becomes the annual rate ÷ 26, and there are 78 payments over three years rather than 36 — so you pay 26 times a year rather than 24 half-payments, and the balance falls sooner. On $10,000 at 12% over 36 months, monthly repayment costs $1,957 of interest and biweekly costs $1,931.
Worked example: $15,000 at 11.99% over 48 months with a 5% fee
Take the defaults and work each figure by hand.
- Periodic rate. r = 11.99 ÷ 100 ÷ 12 = 0.00999167.
- Number of payments. 48 months × 12 ÷ 12 = 48.
- Discount factor. (1.00999167)48 = 1.61245, so (1 + r)−48 = 0.620175 and 1 − that = 0.379825.
- Payment. M = 15,000 × 0.00999167 ÷ 0.379825 = 149.875 ÷ 0.379825 = $394.93.
- Total repaid. 48 × 394.93 = $18,956.83, of which $3,956.83 is interest.
- The fee. 5% × 15,000 = $750, deducted at funding, so you receive $14,250.
- Effective cost rate. Find ρ such that 394.93 × (1 − (1 + ρ)−48) / ρ = 14,250. Bisection gives ρ = 0.0123092 per month, and 0.0123092 × 12 = 14.771%.
So the loan is advertised at 11.99% and costs 14.77%. The whole difference is the $750, and the shorter the term the worse it looks: the identical 5% fee on a 24-month loan pushes 12% up to 17.23%, because the same one-off charge is spread over half as many payments.
How to judge an offer
Compare offers on the effective cost rate, never on the note rate or the monthly payment. A lender quoting 9.99% with an 8% fee is more expensive over four years than one quoting 12.99% with no fee, and neither the rate nor the payment reveals that — only the cost rate does.
Watch the interaction between the fee and the term, because it runs the opposite way to intuition. A fee is a one-off charge, so spreading it over more payments dilutes it: the reference table below shows a 5% fee adding 5.2 points to a 24-month loan and only 2.3 points to a 60-month one. That does not make the long loan cheaper — total interest still rises with term — but it does mean the cost rate alone will understate how much a long loan costs you in dollars. Read the total-repayment figure alongside it.
Then ask what the loan is for. Personal loans are usually the right instrument in two cases: consolidating higher-rate revolving debt, and funding a defined one-off expense you would otherwise put on a card. If you are consolidating, the test is simple — the effective cost rate here must be below the rate on the debt you are clearing, and you must not re-run the balances back up. The credit card payoff calculator gives you the rate to beat, and the debt avalanche calculator shows whether simply attacking the highest rate does the job without a new loan at all.
Finally, look at what a personal loan is not. It is unsecured, so nothing is repossessed if you default — but the rate reflects that risk, which is why personal loan rates sit well above auto loan and mortgage rates and well below credit cards.
What an origination fee adds to a 12% loan
| Origination fee | 24 months | 36 months | 48 months | 60 months |
|---|---|---|---|---|
| 0% | 12.00% | 12.00% | 12.00% | 12.00% |
| 1% | 13.02% | 12.70% | 12.54% | 12.44% |
| 3% | 15.09% | 14.13% | 13.64% | 13.35% |
| 5% | 17.23% | 15.61% | 14.78% | 14.28% |
| 8% | 20.55% | 17.90% | 16.55% | 15.74% |
| 10% | 22.86% | 19.49% | 17.78% | 16.75% |
Read across a row: the same fee costs less in rate terms on a longer loan, because a one-off charge is amortised over more payments. Read down a column: at 24 months an 8% fee adds 8.55 points, which is more than the note rate itself would suggest is possible for a single charge.
Things to check before signing
- Is the quoted figure the rate or the APR? Lenders use both words loosely in marketing. The note carries a box labelled ANNUAL PERCENTAGE RATE — that is the one Regulation Z defines, and it includes the origination fee.
- Prepayment penalties. Rare on personal loans but not extinct. Without one, paying early cuts interest immediately; with one, it may not.
- The fee is not refundable if you repay early. Pay off a 60-month loan in year one and you have paid a 5% fee for twelve months of borrowing, which is a far higher effective rate than the table above shows.
- Autopay discounts are real but conditional. A 0.25% or 0.50% reduction usually disappears if a draft fails, so enter the rate you will actually pay rather than the promotional one.
- Late fees and returned-payment fees are outside this model. They are not finance charges under Regulation Z and do not appear in the APR either.
- Debt consolidation only works if the cards stay paid off. A consolidation loan that is followed by fresh card balances leaves you with both.
- Credit union rates are often materially lower. Federal credit unions are capped at 18% on most loans by NCUA rule, and many charge no origination fee at all.
Where a personal loan sits among the alternatives
Ranked by cost, a household's borrowing options usually run: mortgage or home-equity debt cheapest, then auto loans, then personal loans, then credit cards, with payday and pawn products far above everything. That ordering follows the collateral. A mortgage is secured by a house and an auto loan by a car; a personal loan is secured by nothing, which is exactly why its rate sits where it does.
Against a credit card, a personal loan wins on two structural points and loses on one. It wins because the rate is lower and because the term is fixed, so the balance actually reaches zero — a card left on minimum payments can run for decades. It loses on flexibility: you cannot draw more, and the payment is contractual rather than discretionary.
Against a home-equity loan, the personal loan is more expensive and does not put the house at risk. That is not a small trade. Converting unsecured debt into secured debt lowers the rate and raises the consequence of default from a credit-score problem to a housing problem.
One structural point worth naming: a fixed-term instalment loan changes your credit mix and, once established, tends to help a thin file. But the hard inquiry and the new account will dip the score in the short run, so apply when you are not about to be underwritten for something larger — check the home affordability calculator first if a mortgage is anywhere in the next year, because a new $395 payment reduces the mortgage you qualify for by roughly $62,000 at a 6.5% thirty-year rate.