Act on the result
Approve or reject BNPL using the BNPL contribution change and the required BNPL conversion rate, not conversion alone.
Educational only: Business decision support, not accounting, tax or legal advice.
Privacy: No account is required. Tool inputs and results stay in this browser. Anonymous categorical usage analytics send only governed page, tool, cluster and action identifiers; tool inputs and results are never sent. Error monitoring is disabled. Optional saved state stays only on this device.
Update policy: Reviewed when formulas or official dependencies change.
Scope: Market-neutral small-business planning using your own assumptions.
What this planner helps you decide
Best for
Online sellers comparing their own standard-payment and BNPL fee/conversion scenarios.
Outputs
Per-order contribution, period contribution change and required BNPL conversion rate.
Start here
Replace every zero fee with the exact rates and fixed charges from your own contracts.
Use a different tool when: Do not use this to compare two payment fee structures at an expected transaction volume; use Payment Processing Fee Comparison for that decision. Use this tool to test whether an entered BNPL conversion scenario offsets its entered fees.
Commerce & operations
Buy Now Pay Later Fee Impact: per-order contribution
Per-order contribution, period contribution change and required BNPL conversion rate.
Amounts use the same currency as your inputs. No currency conversion is performed.
Buy Now Pay Later Fee Impact
Decide whether a conversion assumption can justify higher payment fees.
Your numbers stay in this browser
Average order value. Enter the amount on one consistent ex-tax market-currency basis.
Order contribution before payment fee. Enter the amount on one consistent ex-tax market-currency basis.
Enter the rate from your own payment contract.
Enter the fixed fee from your own payment contract. Enter the amount on one consistent ex-tax market-currency basis.
Your entered BNPL fee; no provider default is assumed.
Your entered BNPL fixed fee. Enter the amount on one consistent ex-tax market-currency basis.
Current visitor conversion.
Scenario conversion with BNPL.
Visitors in the comparison period.
Decision result
Each output is bound to its registered ecommerce engine formula.
Fee defaults are deliberately zero. Replace all four fee fields with values from your own standard-payment and BNPL contracts before making a decision.
| Scenario | Contribution per order | Conversion rate | Period contribution |
|---|---|---|---|
| Standard payment | 45.00 | 2% | 9,000.00 |
| BNPL | 45.00 | 2% | 9,000.00 |
- Standard Contribution Per Order Ex Tax
- 45.00
- Bnpl Contribution Per Order Ex Tax
- 45.00
- Standard Period Contribution Ex Tax
- 9,000.00
- Bnpl Period Contribution Ex Tax
- 9,000.00
- BNPL contribution change
- 0.00
- Required Bnpl Conversion Rate
- 2%
Scenario comparison
Each row names the assumption axis changed from the baseline.
ScenarioResultDifference
Current scenario0.00Baseline
Lower Expected BNPL conversion-4,500.00-4,500.00
Higher Expected BNPL conversion4,500.004,500.00
Save these results, change an input, then compare the updated figures with this baseline.
The baseline is temporary in this tab and is not added to shared scenario links or generated reports.
Calculation details
View calculation detailsView the formulas and inputs used for these results.
Standard Contribution Per Order Ex Tax
Standard Contribution Per Order Ex Tax
pre-fee contribution − standard fee45.00Result45.00
Reports money for the entered planning period using the declared ex-tax cost and revenue basis. The engine retains full precision; presentation rounding does not feed calculation.
Buy Now Pay Later Fee Impact Planner formulas →Inputs used by these formula steps
- Standard Contribution Per Order Ex TaxAverage Order Value Ex Tax
- 100
- Standard Contribution Per Order Ex TaxContribution Before Payment Fee Ex Tax
- 45
- Standard Contribution Per Order Ex TaxStandard Fee Rate
- 0
- Standard Contribution Per Order Ex TaxStandard Fixed Fee Ex Tax
- 0
- Standard Contribution Per Order Ex TaxBnpl Fee Rate
- 0
- Standard Contribution Per Order Ex TaxBnpl Fixed Fee Ex Tax
- 0
- Standard Contribution Per Order Ex TaxBaseline Conversion Rate
- 0.02
- Standard Contribution Per Order Ex TaxExpected Bnpl Conversion Rate
- 0.02
- Standard Contribution Per Order Ex TaxVisitors
- 10,000
Bnpl Contribution Per Order Ex Tax
Bnpl Contribution Per Order Ex Tax
pre-fee contribution − BNPL fee45.00Result45.00
Reports money for the entered planning period using the declared ex-tax cost and revenue basis. The engine retains full precision; presentation rounding does not feed calculation.
Buy Now Pay Later Fee Impact Planner formulas →Inputs used by these formula steps
- Bnpl Contribution Per Order Ex TaxAverage Order Value Ex Tax
- 100
- Bnpl Contribution Per Order Ex TaxContribution Before Payment Fee Ex Tax
- 45
- Bnpl Contribution Per Order Ex TaxStandard Fee Rate
- 0
- Bnpl Contribution Per Order Ex TaxStandard Fixed Fee Ex Tax
- 0
- Bnpl Contribution Per Order Ex TaxBnpl Fee Rate
- 0
- Bnpl Contribution Per Order Ex TaxBnpl Fixed Fee Ex Tax
- 0
- Bnpl Contribution Per Order Ex TaxBaseline Conversion Rate
- 0.02
- Bnpl Contribution Per Order Ex TaxExpected Bnpl Conversion Rate
- 0.02
- Bnpl Contribution Per Order Ex TaxVisitors
- 10,000
Standard Period Contribution Ex Tax
Standard Period Contribution Ex Tax
visitors × baseline conversion × standard contribution9,000.00Result9,000.00
Reports money for the entered planning period using the declared ex-tax cost and revenue basis. The engine retains full precision; presentation rounding does not feed calculation.
Buy Now Pay Later Fee Impact Planner formulas →Inputs used by these formula steps
- Standard Period Contribution Ex TaxAverage Order Value Ex Tax
- 100
- Standard Period Contribution Ex TaxContribution Before Payment Fee Ex Tax
- 45
- Standard Period Contribution Ex TaxStandard Fee Rate
- 0
- Standard Period Contribution Ex TaxStandard Fixed Fee Ex Tax
- 0
- Standard Period Contribution Ex TaxBnpl Fee Rate
- 0
- Standard Period Contribution Ex TaxBnpl Fixed Fee Ex Tax
- 0
- Standard Period Contribution Ex TaxBaseline Conversion Rate
- 0.02
- Standard Period Contribution Ex TaxExpected Bnpl Conversion Rate
- 0.02
- Standard Period Contribution Ex TaxVisitors
- 10,000
Bnpl Period Contribution Ex Tax
Bnpl Period Contribution Ex Tax
visitors × BNPL conversion × BNPL contribution9,000.00Result9,000.00
Reports money for the entered planning period using the declared ex-tax cost and revenue basis. The engine retains full precision; presentation rounding does not feed calculation.
Buy Now Pay Later Fee Impact Planner formulas →Inputs used by these formula steps
- Bnpl Period Contribution Ex TaxAverage Order Value Ex Tax
- 100
- Bnpl Period Contribution Ex TaxContribution Before Payment Fee Ex Tax
- 45
- Bnpl Period Contribution Ex TaxStandard Fee Rate
- 0
- Bnpl Period Contribution Ex TaxStandard Fixed Fee Ex Tax
- 0
- Bnpl Period Contribution Ex TaxBnpl Fee Rate
- 0
- Bnpl Period Contribution Ex TaxBnpl Fixed Fee Ex Tax
- 0
- Bnpl Period Contribution Ex TaxBaseline Conversion Rate
- 0.02
- Bnpl Period Contribution Ex TaxExpected Bnpl Conversion Rate
- 0.02
- Bnpl Period Contribution Ex TaxVisitors
- 10,000
BNPL contribution change
Contribution Delta Ex Tax
BNPL period contribution − standard period contribution0.00Result0.00
Reports money for the entered planning period using the declared ex-tax cost and revenue basis. The engine retains full precision; presentation rounding does not feed calculation.
Buy Now Pay Later Fee Impact Planner formulas →Inputs used by these formula steps
- Contribution Delta Ex TaxAverage Order Value Ex Tax
- 100
- Contribution Delta Ex TaxContribution Before Payment Fee Ex Tax
- 45
- Contribution Delta Ex TaxStandard Fee Rate
- 0
- Contribution Delta Ex TaxStandard Fixed Fee Ex Tax
- 0
- Contribution Delta Ex TaxBnpl Fee Rate
- 0
- Contribution Delta Ex TaxBnpl Fixed Fee Ex Tax
- 0
- Contribution Delta Ex TaxBaseline Conversion Rate
- 0.02
- Contribution Delta Ex TaxExpected Bnpl Conversion Rate
- 0.02
- Contribution Delta Ex TaxVisitors
- 10,000
Required Bnpl Conversion Rate
Required Bnpl Conversion Rate
baseline conversion × standard contribution / BNPL contribution; unreachable above 100%0.02 percentResult2%
Reports percent for the entered planning period using the declared ex-tax cost and revenue basis. The engine retains full precision; presentation rounding does not feed calculation.
Buy Now Pay Later Fee Impact Planner formulas →Inputs used by these formula steps
- Required Bnpl Conversion RateAverage Order Value Ex Tax
- 100
- Required Bnpl Conversion RateContribution Before Payment Fee Ex Tax
- 45
- Required Bnpl Conversion RateStandard Fee Rate
- 0
- Required Bnpl Conversion RateStandard Fixed Fee Ex Tax
- 0
- Required Bnpl Conversion RateBnpl Fee Rate
- 0
- Required Bnpl Conversion RateBnpl Fixed Fee Ex Tax
- 0
- Required Bnpl Conversion RateBaseline Conversion Rate
- 0.02
- Required Bnpl Conversion RateExpected Bnpl Conversion Rate
- 0.02
- Required Bnpl Conversion RateVisitors
- 10,000
Inputs used
- Average order value
- 100.00
- Contribution before payment fee
- 45.00
- Standard fee rate
- 0%
- Standard fixed fee
- 0.00
- BNPL fee rate
- 0%
- BNPL fixed fee
- 0.00
- Baseline conversion rate
- 2%
- Expected BNPL conversion
- 2%
- Visitors
- 10,000
Open this calculator with preset values
This calculator supports documented, shareable scenario URLs. Compatible assistants and applications can construct links using the parameters below.
Scenario links contain only allowlisted numeric and closed-choice inputs shown in the URL; Margin101 excludes free text and identifying fields. Anyone you share the URL with can read those numbers, so do not include private or identifying data.
| Parameter | Meaning | Unit | Allowed values | Presence | Default |
|---|---|---|---|---|---|
| averageOrderValueExTax | Average order value. Enter the amount on one consistent ex-tax market-currency basis. | currency units/planning period, ex tax | 0 to 100000000 | Required | 100 |
| baselineConversionRate | Current visitor conversion. | proportion of visitors converting under baseline payment mix | 0 to 1 | Required | 0.02 |
| bnplFeeRate | Your entered BNPL fee; no provider default is assumed. | proportion of order value charged under buy-now-pay-later method | 0 to 1 | Required | 0 |
| bnplFixedFeeExTax | Your entered BNPL fixed fee. Enter the amount on one consistent ex-tax market-currency basis. | currency units/planning period, ex tax | 0 to 100000000 | Required | 0 |
| contributionBeforePaymentFeeExTax | Order contribution before payment fee. Enter the amount on one consistent ex-tax market-currency basis. | currency units/planning period, ex tax | 0 to 100000000 | Required | 45 |
| expectedBnplConversionRate | Scenario conversion with BNPL. | proportion of visitors expected to convert with buy-now-pay-later | 0 to 1 | Required | 0.02 |
| standardFeeRate | Enter the rate from your own payment contract. | proportion of order value charged under standard payment method | 0 to 1 | Required | 0 |
| standardFixedFeeExTax | Enter the fixed fee from your own payment contract. Enter the amount on one consistent ex-tax market-currency basis. | currency units/planning period, ex tax | 0 to 100000000 | Required | 0 |
| visitors | Visitors in the comparison period. | whole visitors/comparison period | 0 to 100000000 | Required | 10000 |
Buy Now Pay Later Fee Impact: per-order contribution
The BNPL contribution change shows whether the entered conversion lift offsets the higher payment fee for the comparison period.
Formula summary
- Primary formula
- required BNPL conversion = baseline conversion × standard contribution / BNPL contribution
Data used here
- The estimate uses your inputs and the general business formula documented in the methodology.
Decision checks
Stress-test the decision
Retest the BNPL fee rate as a percentage of order value and expected BNPL conversion as a percentage of visitors.
When this estimate can be misleading
- Fee defaults are neutral zeroes. Replace them with your own contract values before deciding.
- No provider, Afterpay fee, settlement term, refund rule or conversion forecast is embedded.
- All provider fees, exchange rates, returns, demand and operating rates are user-entered scenarios.
- Use one consistent ex-tax currency and planning period across compared inputs.
- This is educational business decision support, not accounting, tax, legal or financial advice.
- The BNPL contribution change shows whether the entered conversion lift offsets the higher payment fee for the comparison period.
Educational estimate, not advice. See all assumptions & limitations →
Related reading
Guides to interpret the decision and its assumptions.
- Compare Marketplace and Payment Fees
Translate your actual provider contracts and statements into percentage, fixed, recurring, refund and fulfilment components.
Read guide
Frequently asked questions
How do I test whether an entered BNPL conversion scenario offsets its entered fees?
Approve or reject BNPL using the BNPL contribution change and the required BNPL conversion rate, not conversion alone.
Which planning assumptions should I stress-test?
Compare a plausible alternative scenario and verify the decision-critical assumption that changes the plan most.