Loan vs Balance Transfer: Compare the Costs

This calculator estimates a fixed-rate loan’s monthly payment and total interest from the amount borrowed, APR, and term. It does not calculate a balance transfer’s cost, because that depends on a separate card offer’s transfer fee, promotional period, and later APR; compare those figures using the method below.

Formula

The calculator uses the standard fixed-payment amortization formula. First calculate the monthly rate, then divide the loan amount’s monthly interest charge by the factor that accounts for repayment over the full term.

• p = amount borrowed, in dollars.
• apr = annual percentage rate entered as a percentage number, such as 8 for 8% per year.
• r = monthly rate as a decimal, calculated as apr / 1200.
• n = number of monthly payments, calculated as years × 12.
• pmt = monthly payment in dollars: p × r / (1 − (1 + r)⁻ⁿ).
• int = estimated total interest in dollars: pmt × n − p.

The calculator’s displayed monthly payment is rounded to cents by the output format. The total-interest result uses that displayed payment multiplied by the number of monthly payments, then subtracts the original loan amount. Actual contracts can handle the final payment and rounding differently.

Worked Example

Using the default inputs—$20,000 borrowed, an 8% APR, and a five-year term:

1. Monthly rate: 8 / 1200 = 0.0066667.
2. Number of payments: 5 × 12 = 60.
3. Monthly payment: 20,000 × 0.0066667 / [1 − (1 + 0.0066667)⁻⁶⁰] = $405.53, rounded to cents.
4. Total paid using the rounded payment: $405.53 × 60 = $24,331.80.
5. Estimated total interest: $24,331.80 − $20,000 = $4,331.80.

Assumptions

• The APR and payment amount remain fixed throughout the term.
• Payments are made monthly, with the standard amortization calculation assuming regular end-of-period payments.
• Interest accrues monthly at APR / 12.
• Fees, taxes, insurance, and other charges are not included. The calculator does not model a balance-transfer fee or a promotional rate.

Loan vs. Balance Transfer: What’s the Difference?

A personal loan gives you a lump sum that you repay in scheduled installments. A balance transfer moves eligible debt—often a credit-card balance—to another credit-card account under that account’s terms. A transfer is not the same as paying off debt: the amount still has to be repaid, and the receiving account may have a promotional APR for a limited period followed by a different APR.

Both methods can consolidate balances, but their mechanics differ. A loan typically has a set repayment term and scheduled payment. A card balance may have a required minimum payment that changes as the balance changes; paying only the minimum can leave debt outstanding after any promotional period ends. Exact terms depend on the written offer and account agreement.

How to Compare the Costs

Compare the total cost over the same payoff period, not just the advertised APR or the first monthly payment. For a loan, include the payment schedule and any fees disclosed by the lender. For a transfer, account for the fee, the amount you can transfer, the promotional period, the APR that applies afterward, and your planned payment timing.

For example, suppose a $5,000 transfer offer charges a hypothetical 3% fee and gives a 12-month promotional period. The fee would be $150, and the balance would start at $5,150 if the fee is added to the transferred balance. Paying that amount evenly over 12 months would require about $429.17 a month, before considering any other charges. If you pay less, some balance may remain when the promotional period ends, and the applicable later APR matters. This illustration is arithmetic, not a representation of a current offer.

• Ask whether the transfer fee is a percentage, a fixed amount, or subject to a minimum.
• Check the maximum eligible transfer and whether the whole balance can be moved.
• Use the exact promotional end date and post-promotion APR shown in the offer.
• Account for any existing balances and how payments are allocated across balances with different APRs.
• Compare total dollars paid and the expected debt-free date under each repayment plan.

A balance transfer can have a low promotional rate yet still cost more than expected if a fee applies or repayment extends beyond the promotion. Conversely, a loan’s fixed payment can make the payoff schedule easier to forecast, but an upfront charge or a longer term can change its total cost. Neither headline rate alone settles the comparison.

Choosing Which Calculation Fits

Use the calculator above to estimate a fixed-rate loan payment when the amount, APR, and term are known. It cannot establish the terms of a balance-transfer offer or calculate changing card balances. For a transfer comparison, make a separate month-by-month estimate using the actual fee, promotional duration, applicable APRs, and intended payments. If the rate changes or the payment varies, a single fixed-rate loan formula will not reproduce that account’s schedule.

Before comparing, confirm that the proposed payment is feasible for your budget without assuming approval or predicting a credit outcome. Consider whether you could make the planned payments if expenses change, and read the disclosures for the exact account and loan terms. Do not treat a promotional period as an automatic payoff plan.

Common Problems and Misconceptions

• Comparing payment amounts alone: A longer loan term can lower the required monthly payment while increasing the time interest accrues.
• Ignoring the transfer fee: A fee increases the amount that must be repaid, even if the promotional APR is low.
• Assuming a transfer erases debt: It changes where the balance is owed; repayment is still required.
• Expecting this calculator to price a transfer: It assumes a fixed loan rate and regular payments, not a promotional period or rate changes.
• Rounding too early: Small differences can accumulate. This estimate rounds the monthly payment to cents, while an account’s actual final payment may be adjusted.

A further practical issue is transfer timing: an offer may not move every requested balance, and the old account may continue to show an amount due until processing is complete. Check statements and account terms rather than assuming the transfer has settled or that a payment can be skipped.

Frequently Asked Questions

Is a balance transfer a loan?
A balance transfer is a move of debt to another credit-card account, not a new installment loan. The transferred amount remains owed under the receiving account’s terms.

Does a balance transfer always save interest?
No. The result depends on the transfer fee, promotional period, repayment pace, and APR that applies to any remaining balance. Compare the total projected cost using the exact offer terms.

Can I use this calculator for a balance transfer?
Not directly. It estimates payments and interest for a fixed-rate installment loan. A transfer calculation needs the fee, promotional period, later APR, and a payment schedule.

What happens if I do not repay the transfer during the promotional period?
A remaining balance may be subject to the APR and terms specified in the offer. Check the disclosure for the applicable rate and how it is applied; do not assume the balance is automatically cleared.

Should I compare APR or total cost?
Use the APR as one input, but also compare fees, payment timing, repayment duration, and total dollars paid. The same APR can produce different total costs when terms differ.

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

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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