Quick answer
A personal loan calculator prices an unsecured installment loan: fixed amount, fixed rate, fixed payment — and it exposes what the origination fee does to the true cost. Borrow $15,000 at 11.5% over 3 years with a 5% fee and you pay $494.64 a month, but you only receive $14,250, so the effective APR is 15.09%. Because there is no collateral, the rate depends almost entirely on your credit profile.
How the Personal Loan Calculator works, step by step
Enter the amount, the interest rate and the term, typically 2 to 7 years, plus the origination fee as a percentage. The calculator amortises the loan into equal monthly payments and totals the interest — then solves for the effective APR, the rate that prices those same payments against the smaller amount you actually receive.
The fee is the trap in the headline rate. Origination fees are usually deducted from the amount you receive — borrow $15,000 with a 5% fee and $14,250 arrives — while interest is charged on the full $15,000. That lifts the true APR from 11.5% to 15.09% in the example, and the total cost of borrowing (interest plus fee) to $3,557. To net the full $15,000 you would need to borrow $15,789.
Personal loans are the standard tool for consolidating credit card balances and funding one-off costs, because the rate is usually far below card APRs and the fixed end date forces the debt to actually die. A card balance, by contrast, has no finish line as long as minimum payments shrink with the balance — the Federal Reserve's Q3 2026 average on interest-bearing card accounts was 22.36%.
Compare the loan against the card maths, not the card payment. The same $15,000 on a card at 22.36%, paid at the loan's $494.64 a month, would take 46 months and cost $7,306 of interest — the personal loan saves about $4,499 and finishes ten months sooner, which is the entire case for consolidation loans in one comparison.
Use the effective APR, not the headline rate, to compare offers. A lender quoting 11.5% with a 5% fee is more expensive than one quoting 13% with no fee on the same term, and the calculator's fee-impact panel shows the difference in dollars. Shorter terms make fees bite harder, because the same fee is spread over fewer payments.
The formula
Monthly payment = Amount × [r(1 + r)^n] ÷ [(1 + r)^n − 1], r = rate ÷ 12, n = term in months. Fee = amount × fee %. Net proceeds = amount − fee. Total interest = (payment × n) − amount. Effective APR is the monthly rate i solving: net proceeds = payment × [1 − (1 + i)^(−n)] ÷ i, annualised as i × 12, found by iteration.
Worked example — try it on the calculator above
Worked example: $15,000 at 11.5% over 3 years, 5% fee
Payment: $494.64 a month. Total repaid: $17,807.04, so interest is $2,807.04. The 5% origination fee is $750, deducted from the proceeds, so you receive $14,250 while repaying interest on the full $15,000 — total cost of borrowing $3,557.04, effective APR 15.09%. The same $15,000 on a credit card at 22.36% APR, paid at the same $494.64 a month, would take about 46 months and cost roughly $7,306 of interest — the personal loan saves about $4,499 and finishes ten months sooner.
Frequently Asked Questions
What credit score do I need for a personal loan?
Most lenders work from a FICO score of about 660 upward for reasonable rates; scores above 740 get the best pricing, often single-digit APRs. Borrowers in the low 600s can still be approved but at rates in the 20s and 30s, at which point the loan may not beat the debt it replaces. Some lenders weigh income and employment more than score for smaller amounts.
How fast can a personal loan be funded?
Online lenders commonly fund within 1 to 5 business days of approval; some offer next-day funding. Banks and credit unions take a few days longer but often price better for existing customers. Speed is rarely the deciding factor — the APR and fees are, because they apply for the whole term.
Does applying for a personal loan hurt my credit score?
Rate-checking with a soft inquiry does not. A formal application triggers a hard inquiry, typically costing a few points temporarily, and the new loan changes your score mix and utilisation. Paying off card balances with the loan usually raises the score over time by cutting revolving utilisation — provided the cards are not run up again.
What can a personal loan not be used for?
Lender terms commonly prohibit using proceeds for post-secondary education expenses, investing or securities, real estate purchases in some cases, and illegal activity. Federal student loan needs must be met with education loans, which carry borrower protections a personal loan lacks. Beyond the contract, borrowing to invest converts a market risk into a certain payment — the calculator's interest total is guaranteed; the investment return is not.
Estimates, not advice. This calculator provides educational estimates based on the inputs you enter and the assumptions shown on this page. It is not financial, tax or investment advice, and it cannot see your full situation. Verify important figures against official sources, and consider a qualified professional for decisions about your own money. See our Disclaimer and Methodology.