Refinance a Personal Loan Into a Shorter Term?

This calculator estimates the monthly payment and total interest for a fixed-rate personal loan using its amount, APR, and term. Enter the proposed shorter term to see the scheduled payment and interest; the calculation does not determine whether refinancing is available or account for lender fees.

Formula

A shorter-term refinance is a new loan that repays an existing personal loan, with the remaining balance financed over fewer months. This calculator estimates the new loan’s scheduled payment and the interest paid over that term; it does not calculate your existing loan’s payoff amount or compare the two loans automatically.

The monthly payment formula is M = P × r ÷ [1 − (1 + r)⁻ⁿ], where P is the new loan amount in dollars, r is the monthly interest rate as a decimal, and n is the number of monthly payments. Here, r = APR ÷ 1,200 when APR is entered as a percentage per year, and n = years × 12. Total interest is estimated as I = M × n − P. The calculator’s payment is displayed to the nearest cent, and total interest uses that rounded payment.

For a real refinance estimate, the loan amount should reflect the payoff figure the current lender provides, plus any amount financed for fees if applicable. The APR and term should be figures supplied for the proposed loan, not assumptions about what a lender might offer.

Worked Example

Using the calculator’s default inputs—$20,000, an 8% APR, and five years:

1. Convert APR to a monthly decimal rate: 8 ÷ 1,200 = 0.0066667.
2. Convert the term to payments: 5 × 12 = 60 months.
3. Apply the payment formula: $20,000 × 0.0066667 ÷ [1 − (1 + 0.0066667)⁻⁶⁰] = approximately $405.53 per month.
4. Estimate total interest using the displayed payment: $405.53 × 60 − $20,000 = $4,331.80.

The results are an estimated monthly payment of $405.53 and total interest of $4,331.80, before any fees or other charges.

Assumptions

• The interest rate is fixed for the full term.
• Payments are equal monthly payments, made at the end of each monthly period.
• Interest accrues monthly using APR divided by 12.
• The estimate excludes origination or other fees, taxes, insurance, and any charges not entered as part of the loan amount. It does not model a lender’s exact payoff calculation.

What Refinancing Into a Shorter Term Changes

Refinancing replaces the current loan with a new one. A shorter term means the balance is scheduled to be repaid in fewer payments. If the new balance and rate were unchanged, reducing the term would generally raise the required monthly payment while reducing the time during which interest accrues. The actual outcome also depends on the new APR, the payoff balance, fees added to the loan, and payment timing.

For instance, a borrower with 36 payments remaining might consider a new 24-month loan. Comparing only the monthly payment misses important details: the new payment could be higher because repayment is compressed, while upfront or financed fees can affect the total cost. A lower APR by itself does not establish that the new loan costs less overall.

To compare options, gather the current lender’s payoff quote, the remaining payment schedule, and the proposed loan’s written terms. Compare the remaining payments on the existing loan with the proposed payments plus fees and other charges. Make sure both calculations cover the same period and use the amount actually needed to settle the old debt. This calculator provides a payment estimate for one set of proposed terms; it does not make that full comparison.

How to Read the Estimate and Compare Costs

The monthly payment is the scheduled amount under the formula’s assumptions, not a quote or approval decision. Total interest is the sum implied by the rounded payment over the selected term minus the amount borrowed. If a lender collects an upfront fee, that fee may increase the cash needed at closing; if it is financed, the larger loan balance can increase interest as well.

When reviewing actual offers, check the amount deposited or used to pay off the old loan, the APR, term, payment schedule, and all disclosed fees. Also check whether the old loan has any charges associated with paying it off early, as terms vary by contract and applicable rules. Use the lender’s payoff figure rather than the balance shown on a recent statement: interest can accrue between statement dates and payoff.

A lower payment is not necessarily evidence of lower borrowing cost. It may result from a longer term, while a shorter term can increase the payment even if it reduces total interest. Compare the full remaining cost and the payment amount together, using actual figures rather than a single headline number.

Common Problems and Limits

• Using the original balance: Refinancing usually involves the amount required to settle the current loan, not necessarily the amount first borrowed. Obtain an up-to-date payoff figure.
• Leaving out fees: A calculator that has no fee input cannot show their effect. Include financed charges in the loan amount for an approximate payment, and account separately for charges paid upfront.
• Mixing up APR and monthly rate: Enter APR as a yearly percentage, such as 8, not as 0.08 or as a monthly rate. The formula converts it to a monthly rate.
• Rounding: The payment is rounded to cents. A lender may calculate interest daily, use different payment dates, or adjust the final payment, so its exact totals can differ.

The formula assumes a fixed rate, equal payments, and regular monthly periods. It does not assess eligibility, predict a rate, model variable rates or irregular payments, or account for changes to the loan balance. It is an educational estimate, not financial advice; use figures from the lender for an actual offer.

Frequently Asked Questions

Can I refinance a personal loan into a shorter term?
Possibly, if a lender offers a new loan with a term shorter than the time remaining on the existing loan and the borrower meets that lender’s requirements. Availability and terms depend on the lender; this calculator does not assess eligibility.

Will a shorter loan term increase my monthly payment?
It can. Repaying a similar balance in fewer months generally requires larger scheduled payments, though the exact payment also depends on the APR and loan amount.

Does refinancing into a shorter term always save interest?
No. A shorter schedule can reduce the time interest accrues, but a different APR, fees, or a larger financed balance can change the overall cost. Compare actual terms over the same period.

What loan amount should I enter?
Use the proposed new loan principal. To estimate a refinance, start with the current lender’s payoff quote and include any charges that the proposed lender would add to the financed balance.

Should I compare APR or monthly payment?
Neither figure alone tells the full story. Review APR, payment, term, payoff amount, and fees together, and compare the total remaining cost of each option.

This result is an estimate, and the lender’s disclosure gives the exact figures.

Related

• First Financial Refinance Personal Loan Calculator
• Personal Loan Refinance Calculator and Company Guide
• DCU Auto Loan Refinance Calculator and Payment Guide

in p | Loan amount | $ | 20000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Loan term | years | 5 | 0.0833 | 50
out pmt | Monthly payment | $ | p * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)) | 2
out int | Total interest | $ | pmt * yrs * 12 - p | 2