Balance Transfer Savings Calculator Guide: Formula & Worked Example
Short answer
Interest saved by moving a card balance to a 0% APR promo. In the fixed example below, estimated savings is 2,037.79. Your answer depends on the inputs and assumptions you choose.
Formula
Result = Balance Transfer Savings Calculator calculation using balance, current apr, monthly payment, 0% promo length, transfer fee, apr after promo
The inputs are balance, current apr, monthly payment, 0% promo length, transfer fee, apr after promo. Use the input scale shown beside each field and keep time periods and units consistent. Only round the final result for display.
Worked example
- Balance
- 8000
- Current APR
- 24
- Monthly payment
- 400
- 0% promo length
- 18
- Transfer fee
- 3
- APR after promo
- 25
- Estimated savings: 2,037.79
- Interest – keep current card: 2,318.98
- Fee + interest – transfer: 281.19
- Months to pay off (transfer): 21
Understanding the result
Interest saved by moving a card balance to a 0% APR promo. Start with the base example, then replace each value with the figure that matches your situation.
Balance
The example uses 8000 for balance. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
Current APR
The example uses 24 % for current apr. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
Monthly payment
The example uses 400 for monthly payment. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
0% promo length
The example uses 18 months for 0% promo length. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
Transfer fee
The example uses 3 % for transfer fee. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
APR after promo
The example uses 25 % for apr after promo. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
What the comparison means
The comparison changes only balance, keeping every other example input fixed. This isolates that input's effect on the primary result. It does not predict future outcomes.
Rates, fees, eligibility, local tax rules and provider rounding can change the final amount. Reference tax and exchange-rate data may be outdated; verify the official source before deciding.
Comparison
| Scenario | Input | Result |
|---|---|---|
| Lower input | Balance: 6400 | Estimated savings: 1,199.12 |
| Base example | Balance: 8000 | Estimated savings: 2,037.79 |
| Higher input | Balance: 9600 | Estimated savings: 3,082.22 |
Common mistakes
- Using the wrong units for balance.
- Comparing results while changing more than one input at a time.
- Rates, fees, eligibility, local tax rules and provider rounding can change the final amount. Reference tax and exchange-rate data may be outdated; verify the official source before deciding.
Checklist
- Confirm balance.
- Confirm current apr is expressed in %.
- Confirm monthly payment.
- Confirm 0% promo length is expressed in months.
- Confirm transfer fee is expressed in %.
- Check the result against your source or provider.
Calculators Percentage Editorial Team
Calculator guides from the Calculators Percentage team. These introductory examples are educational, not professional advice.
Last reviewed:
Rates, fees, eligibility, local tax rules and provider rounding can change the final amount. Reference tax and exchange-rate data may be outdated; verify the official source before deciding.