Personal Loan Payment Calculator

How it works

A personal loan is repaid in equal monthly installments, so the calculator solves for the one payment that clears the balance exactly on schedule. Each month interest is charged on whatever you still owe, and the fixed payment covers that interest plus a slice of principal. Early on the balance is large so more of the payment is interest; as the balance shrinks, more of each payment is principal.

The level payment comes from the standard amortization formula:

• M — the fixed monthly payment
• P — the amount you borrow
• i — the monthly rate (APR ÷ 12)
• n — the number of monthly payments

With the defaults, a $15,000 personal loan at 11% APR repaid over 4 years, which is 48 monthly payments, comes to about $388 a month. Add those payments up and you repay roughly $18,609 in all, so about $3,609 of what you hand over is interest. Stretching the term lowers that monthly figure but raises the interest, because the balance sits around longer collecting it.

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A worked example: $15,000 over four years

Picture borrowing $15,000 to redo a tired old kitchen, at an 11% APR paid back steadily over four years. That works out to 48 monthly payments before the balance finally hits zero.

The math lands at $388 a month. Across all 48 of those payments you hand back $18,609 in total, which means $3,609 of it is pure interest piled on top of the amount you actually borrowed.

Your rate rides on your credit. Excellent credit near 8% trims the payment to $366, while fair credit around 15% pushes it to $417, a $51 monthly difference on the same loan. Run your amount, rate, and term to see your real payment.

Ways to lower the monthly payment

• Borrow a little less. The payment scales directly with the amount, so trimming the loan by even a thousand dollars shows up immediately in the monthly number.
• Bring the rate down. A better credit score, a co-signer, or shopping a few lenders can shave points off the APR, and every point lowers both the payment and the total interest.
• Lengthen the term, with eyes open. A longer term spreads the balance over more payments so each one is smaller, but you pay interest for more months. Use the total-interest figure to judge whether the trade is worth it.

Where a personal loan fits

A personal loan is money a bank, credit union, or online lender hands you as a lump sum, which you repay in fixed monthly installments over a set term of usually two to seven years. Most are unsecured, meaning no house or car backs them, so the lender leans on your credit score and income rather than collateral to set the rate. That structure makes a personal loan a clean fit for some jobs and a poor one for others.

• Consolidating debt. Rolling several credit card balances into one fixed-rate loan usually drops the rate and, just as important, gives the debt a real end date instead of an open-ended minimum.
• Known one-off costs. A medical bill, a home repair, a move, or a wedding, where you know the amount up front and want a predictable payment you can plan around.
• Not everyday spending. If you cannot say exactly what the money is for, a loan is rarely the answer; revolving credit or simply saving up fits better and costs less.

Because both the payment and the payoff date are locked in from day one, a personal loan is easiest to live with when the expense is a finite, known number rather than an open-ended habit.

A shorter or longer term, side by side

The term you choose trades the monthly payment against the total interest, and lining up three terms side by side makes the deal plain. Hold the amount and rate steady at $15,000 and 11% APR, and change only the length:

• Three years (36 payments). About $491 a month, with roughly $2,679 in total interest.
• Four years (48 payments). The default here, about $388 a month, with roughly $3,609 in interest.
• Six years (72 payments). A much easier $286 a month, but interest climbs to about $5,557.

Stretching from three years to six nearly halves the monthly payment, which is tempting when cash is tight, yet it more than doubles the interest and keeps you in debt for twice as long. The shortest term you can comfortably afford is almost always the cheapest path to being done. A useful trick is to pick the term whose payment you could still cover in a lean month rather than a good one, then treat any spare cash as an optional extra payment.

That way a rough patch never puts you behind, and a good month still lets you finish early.