How much do I need to pay monthly to make a balance transfer work?

The transferred balance, fee included, divided by the promo months (at a true 0 percent promo). On 6,000 dollars with a 3 percent fee and 15 months, that is 6,180 over 15, or 412 dollars a month. Paying less means the go-forward APR meets whatever is left the month the promo dies.

Is a balance transfer worth the 3 to 5 percent fee?

Usually yes when the alternative is carrying the balance at 20-plus percent, because the fee equals just a few months of the interest you avoid. This calculator's break-even output shows the exact month the avoided interest covers the fee; on typical inputs it lands within the first three to five months.

What happens when the 0 percent promo ends?

The card's regular APR applies to whatever balance remains, going forward only. Credit-card intro APRs are not deferred-interest deals, so there is no retroactive interest, but a leftover balance starts accruing at roughly 20 percent immediately, which is why the required-payment figure matters more than the promo length.

Can I keep using the card after a balance transfer?

You can, but it usually costs you the grace period: while a promo balance sits on the card, new purchases commonly accrue interest from day one unless you pay the entire balance, including the transferred amount. The clean play is to treat the transfer card purely as a payoff vehicle until it reads zero.

Does a balance transfer hurt your credit score?

Opening the new card adds a hard inquiry and lowers your average account age, which typically costs a few points short-term. Utilization often improves as the new limit is added and the balance falls. The score effect is usually minor next to the interest saved; missing a payment on either card is the real risk.

Balance Transfer Calculator

Price a 0 percent balance transfer honestly: the payment that clears it inside the promo, the fee break-even, and the balance left when the promo dies.

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Payment to clear inside the promo

$412.00

Transfer fee: $180.00
Total cost with the transfer: $283.68
Total cost staying put: $1,542.85
Savings from transferring: $1,259.17
Fee break-even: 2 months
Balance the month the promo ends: $1,680.00
First month of post-promo interest: $29.40

Balance by month: transfer vs staying put

Three ways to handle the balance

Strategy	Time to zero	Interest plus fee	Total paid
Stay put at your payment	26 months	$1,542.85	$7,542.85
Transfer at your payment	21 months	$283.68	$6,283.68
Transfer at the required payment	15 months	$180.00	$6,180.00

Quick answer: With the example inputs this page loads by default, the headline result (Payment to clear inside the promo) comes to $412.00. Price a 0 percent balance transfer honestly: the payment that clears it inside the promo, the fee break-even, and the balance left when the promo dies. Change any input above and every figure updates instantly in your browser.

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Fact-check: results on this page are verified against an independently coded reference oracle that covers all 106 calculators on this site. See how we verify .

A balance transfer wins when you clear the balance inside the promo window, and the number that decides that is the required monthly payment: the transferred balance, fee included, divided by the promo months at a 0 percent rate. On a 6,000 dollar balance with a 3 percent fee and 15 promo months, that is 412 dollars a month. This calculator shows that payment, the total cost against staying put, the month the fee breaks even, and exactly what you would owe the month the promo ends at your actual payment.

What this result means

Read the required payment first: if it does not fit your budget, the promo will outlive your payoff and the go-forward APR gets a vote. The danger readout is the honest version of that future: the balance on promo-death day and its first month of interest at the go-forward rate. Two traps sit outside the math and both void the plan. A late payment can cancel the promo rate early, and new purchases on the card usually accrue interest immediately while a promo balance rides along, because the grace period only returns when the whole balance is paid. Treat the transfer card as a payoff vehicle, not a wallet card, and set the payment on autopay at or above the required figure.

Assumptions

Both paths use the issuer convention: each month's interest is the balance times the APR divided by 12, rounded to the cent, and your payment (capped at the full payoff) is applied monthly. The transferred balance is your balance plus the fee, and the fee accrues promo-rate interest like the rest of the balance.
The promo is a true 0 percent (or low) intro APR, not deferred interest: when it ends, the go-forward APR applies to whatever balance remains, from that month forward only. Deferred-interest financing, which charges interest retroactively, lives mostly on store and medical cards, not mainstream balance-transfer cards.
The required payment amortizes the transferred balance to exactly zero over the promo months at the promo APR; at 0 percent it is simply the transferred balance divided by the months. Cent rounding can leave a few pennies for one extra month.
No new purchases are modeled on either card, and this matters more than it sounds: while a promo balance rides on the card, new purchases usually get no grace period and accrue interest immediately until the entire balance is paid (Regulation Z mechanics, per the CFPB's guidance). The comparison also assumes the promo survives; a single late payment can void a promo rate early.
Costs compare interest plus the fee only; the principal is excluded from both sides because you owe it either way. The transfer fee default reflects the 3 to 5 percent standard range (about half of 2025 offers charge 3 percent per LendingTree); the post-promo APR default reflects the roughly 20 to 21 percent current averages (Bankrate, LendingTree).
Not modeled: transfer deadlines to qualify for the promo rate (often 30 to 120 days from opening), transfer caps below the credit limit, same-issuer transfer bans, credit-score effects, and annual fees. This is an estimate for educational purposes only, not financial advice.

Key terms

Definitions for the terms this calculator uses, in our finance glossary .

Annual Percentage Rate (APR)

How it works

Every path runs the issuer convention through the shared fixed-payment phase engine: each month’s interest is the balance times the APR divided by 12, rounded to the cent, then your payment (clamped to the full payoff) reduces the balance. The stay-put path runs your payment against the current APR until the balance clears or provably never does. The transfer path starts from the transferred balance, your balance times (1 + fee percent), runs the promo months at the promo APR, then hands whatever remains to the go-forward APR.

The required payment is the standard amortization factor applied to the transferred balance over the promo months at the promo APR; at a true 0 percent promo the factor collapses to 1 over the months, so the required payment is simply the transferred balance divided by the promo length. The break-even month is the first month cumulative stay-put interest reaches the fee plus cumulative transfer-path interest. Costs compare interest plus the fee only, because the principal is owed on either path.

Worked example

A $6,000 balance at 22 percent, a 3 percent fee, a 15-month 0 percent promo, a $300 planned payment, and a 21 percent go-forward APR.

Transferred balance: 6,000 x 1.03 = $6,180; the fee is $180.
Required payment: 6,180 / 15 = $412 a month to be at zero when the promo ends.
At $300: the promo window retires $4,500, leaving $1,680 on promo-death day, which accrues $29.40 of interest its first go-forward month and takes 6 more months to clear with $103.68 of interest. Total transfer cost: 180 + 103.68 = $283.68.
Staying put: 26 months and $1,542.85 of interest, so the transfer saves $1,259.17.
Break-even: staying put accrues $110.00 of interest in month one and about $108 in month two, so the $180 fee is covered in month 2.

What is included and excluded

The promo is modeled as a true intro APR, not deferred interest: nothing accrues retroactively, which matches how mainstream balance-transfer cards work (deferred interest lives on store and medical financing). No new purchases are modeled, and that assumption carries real weight, because a card carrying a promo balance usually gives new purchases no grace period until the entire balance is paid. Not modeled: promo forfeiture after a late payment, transfer deadlines and caps, same-issuer bans, annual fees, and credit-score effects. Defaults are sourced: the 3 percent fee reflects the most common offer (about half of offers per LendingTree’s 2025 survey, with 4 to 5 percent growing), and the 21 percent go-forward APR sits at the current average (Bankrate 19.57 percent, LendingTree 20.94 percent, mid-2026).

Sources

Frequently asked questions

How much do I need to pay monthly to make a balance transfer work?: The transferred balance, fee included, divided by the promo months (at a true 0 percent promo). On 6,000 dollars with a 3 percent fee and 15 months, that is 6,180 over 15, or 412 dollars a month. Paying less means the go-forward APR meets whatever is left the month the promo dies.
Is a balance transfer worth the 3 to 5 percent fee?: Usually yes when the alternative is carrying the balance at 20-plus percent, because the fee equals just a few months of the interest you avoid. This calculator's break-even output shows the exact month the avoided interest covers the fee; on typical inputs it lands within the first three to five months.
What happens when the 0 percent promo ends?: The card's regular APR applies to whatever balance remains, going forward only. Credit-card intro APRs are not deferred-interest deals, so there is no retroactive interest, but a leftover balance starts accruing at roughly 20 percent immediately, which is why the required-payment figure matters more than the promo length.
Can I keep using the card after a balance transfer?: You can, but it usually costs you the grace period: while a promo balance sits on the card, new purchases commonly accrue interest from day one unless you pay the entire balance, including the transferred amount. The clean play is to treat the transfer card purely as a payoff vehicle until it reads zero.
Does a balance transfer hurt your credit score?: Opening the new card adds a hard inquiry and lowers your average account age, which typically costs a few points short-term. Utilization often improves as the new limit is added and the balance falls. The score effect is usually minor next to the interest saved; missing a payment on either card is the real risk.

Related calculators

Learn how this works

New to this topic? Our companion guide explains it in plain language: Will a Balance Transfer Actually Save You Money?

By Sam Sage Last reviewed July 2026.