Personal Loan Calculator

A personal loan is repaid in equal monthly installments over a fixed term. Each payment covers that month's interest first, with the remainder reducing your principal balance. Because the balance shrinks every month, the interest portion of each payment gets smaller while the principal portion grows — even though the total payment itself never changes.

When the rate is exactly 0%, the formula above is undefined (division by zero), so CalcPro falls back to the simpler M = P ÷ n — an even split of the principal across the term, with no interest added. CalcPro's effective APR figure goes a step further: it solves for the actuarial monthly rate that discounts your entire actual payment stream — including any origination fee deducted from your proceeds and any extra payments you've modeled — back to the amount you actually received, the same method regulators require lenders to disclose.

A personal loan is a lump sum of money you borrow from a bank, credit union, or online lender and repay in fixed monthly installments over a set term, typically two to seven years. Unlike a mortgage or auto loan, a personal loan is usually unsecured, meaning it isn't tied to a specific piece of collateral like a house or car — the lender approves you based on your income, credit history, and existing debts rather than an asset it could repossess.

Because there's no collateral backing most personal loans, lenders generally charge a higher interest rate than they would for a secured loan of similar size. In exchange, you get flexibility: personal loan proceeds can typically be used for almost anything, from consolidating credit card debt to covering a medical bill, funding a home renovation, or paying for a wedding. A small number of secured personal loans do exist, usually backed by a savings account or certificate of deposit, and these tend to carry lower rates because the lender has recourse if you stop paying.

The process starts with an application, where the lender reviews your credit score, income, employment history, and current debt load. If approved, you're offered a specific loan amount, interest rate, and term. Once you accept, the lender deposits the funds — usually within one to five business days — minus any origination fee that's deducted up front.

From there, you make the same fixed payment every month until the loan is paid off. Each payment is split between interest (calculated on your current balance) and principal (which reduces what you owe). Early in the loan, more of each payment goes toward interest; later payments are weighted more heavily toward principal, even though the total payment amount never changes. This structure is called amortization, and it's exactly what the formula and schedule above compute for your own numbers.

The interest rate is the percentage a lender charges on the amount you borrow — it's the raw cost of using the lender's money. The APR (annual percentage rate) takes that same interest rate and adds in most of the lender's mandatory fees, such as an origination fee, then expresses the combined cost as a single annualized percentage. Because APR includes more of the true cost of borrowing, it's almost always equal to or slightly higher than the stated interest rate, and it's the figure regulators require lenders to disclose so consumers can compare offers apples-to-apples.

Two loans with the same interest rate can have meaningfully different APRs if one charges a 5% origination fee and the other charges none. When you enter an origination fee into the advanced options above, CalcPro's "Effective APR" figure recalculates using this same actuarial method — discounting your actual payment stream against the amount you actually received — so you can see your true cost of credit rather than just the headline rate.

Most personal loans carry a fixed rate: the interest rate is locked in when you sign, so your monthly payment never changes for the life of the loan. This makes budgeting simple and protects you if market interest rates rise later.

A smaller number of lenders offer variable-rate personal loans, where the rate is tied to a benchmark index and can move up or down periodically. Variable rates sometimes start lower than fixed rates, but your payment can increase if the benchmark rises — which makes long-term budgeting harder to predict. For most borrowers who value payment certainty, a fixed-rate personal loan is the safer default, and it's what this calculator assumes.

While every lender sets its own criteria, most look at the same core factors: your credit score and credit history, your income and employment stability, your existing debt obligations, and sometimes your education or banking relationship with the lender. Many lenders also require you to be at least 18 years old, a legal resident or citizen with a valid identification and Social Security number (or equivalent), and to have an active bank account for the funds to be deposited into and payments withdrawn from.

Some lenders specialize in near-prime or subprime borrowers with lower scores, though these loans typically carry higher rates. Getting prequalified — a process that usually involves a soft credit check that doesn't affect your score — is the easiest way to see realistic rate estimates before you formally apply.

Your credit score is one of the biggest factors in the rate you're offered. Borrowers with excellent credit (often 720 and above) typically qualify for a lender's lowest advertised rates, while those in the good range (roughly 690–719) still get competitive offers. Fair credit (roughly 630–689) usually means noticeably higher rates, and borrowers below that range may only qualify with specialty lenders at rates well into the double digits, or may need a co-signer.

Applying for a personal loan triggers a hard inquiry, which typically causes a small, temporary dip in your score. Shopping around within a short window (most scoring models use 14–45 days) is usually treated as rate-shopping for a single loan and counted as one inquiry rather than several, so comparing multiple lenders quickly is generally safe for your score.

Debt-to-income ratio is your total monthly debt payments — including the new loan payment you're applying for — divided by your gross (pre-tax) monthly income. A borrower with $1,800 in monthly debt payments and $5,000 in gross monthly income has a DTI of 36%. Most personal loan lenders prefer a DTI below roughly 35–43%, though exact thresholds vary by lender and by how strong your other qualifications are.

A lower DTI signals to lenders that you have more room in your budget to absorb a new payment, which generally improves both your approval odds and the rate you're offered. Paying down existing balances, or choosing a smaller loan amount, are the two most direct ways to improve your DTI before applying.

An origination fee is a one-time charge, usually 1–10% of the loan amount, that many lenders deduct from your loan proceeds before disbursing the rest to you. If you borrow $20,000 with a 5% origination fee, the lender keeps $1,000 and deposits $19,000 into your account — but you still owe and repay the full $20,000 principal plus interest. This is exactly why origination fees push your effective APR above your stated interest rate: you're paying interest and making payments on money you never actually received in full.

Not every lender charges an origination fee, and some that do will negotiate or waive it for strong applicants. Always compare the APR — not just the interest rate — when an origination fee is involved, and factor the fee into how much you actually need to borrow if you have a specific dollar amount you need in hand.

Most lenders provide a short grace period, but once a payment is late, you'll typically be charged a flat late fee or a percentage of the missed payment. If a payment remains unpaid for around 30 days, lenders commonly report it to the major credit bureaus, which can meaningfully lower your credit score and stay on your report for up to seven years.

Continued non-payment can lead to loan default, at which point the lender may accelerate the full remaining balance, turn the account over to a collections agency, or pursue legal judgment. If you know you'll be unable to make a payment, contacting your lender before the due date — many offer hardship programs, deferment, or a revised payment plan — is almost always better than letting the account go delinquent.

Because interest on a personal loan accrues on your outstanding balance, paying extra toward principal — whether as one-time lump sums or a higher recurring payment — reduces the interest charged in every subsequent month and shortens your payoff timeline. Use the "Extra monthly payment" field in the advanced options above to see exactly how much time and interest you'd save with your own numbers, visualized in the savings chart below.

Before making extra payments, confirm your loan doesn't carry a prepayment penalty — a fee some lenders charge for paying off the balance ahead of schedule. Most modern personal loans in the U.S. do not include one, but it's always worth checking your loan agreement or asking your lender directly.

Refinancing means taking out a new personal loan — ideally at a lower rate or with different terms — and using it to pay off your existing loan. It can make sense if your credit score has improved significantly since you first borrowed, if market rates have fallen, or if you want to change your monthly payment by extending or shortening the term.

Before refinancing, compare the new loan's APR (not just its rate) against your current loan's remaining cost, and factor in any origination fee on the new loan. Refinancing to a longer term can lower your monthly payment but may increase the total interest you pay overall, even at a lower rate — model both scenarios in the comparison tool above before deciding.

When comparing offers from multiple lenders, line up four figures side by side: the APR (not just the interest rate), the origination fee, the loan term, and the total repayment amount. A lower monthly payment from a longer term can look appealing but often means paying substantially more in total interest — the comparison tool above will show this clearly when you stack scenarios with different terms.

Also check for prepayment penalties, late fee structures, and whether the lender reports to all three major credit bureaus (useful for building credit history). Getting prequalified with two or three lenders, which typically uses a soft credit check, lets you compare real, personalized rate offers without any impact on your credit score.

"A lower rate always means a cheaper loan." Not necessarily — a lower rate paired with a longer term or an origination fee can still cost more in total than a slightly higher rate with a shorter term or no fee. Always compare total repayment, not just the rate.

"Paying extra reduces my monthly payment." With a standard amortizing loan, extra payments reduce your remaining term and total interest, but your required monthly payment stays the same unless your lender specifically recasts the loan.

"My APR and interest rate should always match." They only match when there are no origination fees or other financed charges. Any upfront fee will push your true, effective APR above the stated interest rate.