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Calculate Payment Gateway fees

Calculate Payment Gateway fee from payment amount, rate and fixed value.

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Calculate Payment Gateway fees

Formula: Fee = (Total × %) + Constant per item

Payment Gateway Transaction Fee Calculator

The Payment Gateway Transaction Fee Calculator estimates a cost estimation estimate for your scenario from the quantities, rates, period, units and other assumptions requested on the page. Replace the example values with your own payment gateway figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.

Enter sales, commission rate (%) and fixed value per item to see actual commission and revenue.

If not, put 0

Formulas used

  • Commission = (Sales × Rate%) + Constant
  • Actual revenue = sales - commissions.
  • Actual rate (%) = commission ÷ sales × 100

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Check before using results

Summary before deciding

This calculation result is suitable for preliminary planning. Actual figures should be checked from documents or official sources before making important decisions.

  • The calculation is based on the information you enter on this page.
  • Special cases may require additional information.
  • It is recommended to record or compare the results with the related tools below.
Calculation method and references

Related manuals and tools

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Frequently asked questions

How much does the payment gateway charge?
Most of the time, the transactions are written as "% + constants" e. g. 2.9% + 10 baht/item. This means that every transaction has both a % and a constant.
What's the difference between Omise and Stripe?
Omise supports Thai payments (PromptPay, Thai card) rate ~2.35–3.65% Stripe supports international cards rate ~2.9% + fixed value
Is the Payment Gateway fee VAT-based?
Payment Gateway fee is an electronic service, may have additional VAT 7% depending on the provider, check the debt statement.
Disclaimer: Fees may vary depending on provider and service plan. Please confirm with Payment Gateway before use.

English calculator guide

How to use the Payment Gateway Transaction Fee Calculator

Use this page to test a specific payment gateway scenario. Enter your own values in the calculator above, review the units beside each field, and recalculate after changing an assumption. The result updates the payment gateway transaction fee estimate instead of relying on a generic example.

  1. Build a baseline payment gateway case with figures that match your situation.
  2. Run a second payment gateway case after changing the rate, period, quantity or other key assumption.
  3. Record the difference between the two payment gateway results and the input responsible for it.

Inputs for the payment gateway estimate

For this payment gateway calculation, check the quantities, rates, period, units and other assumptions requested on the page. The result is designed to show a cost estimation estimate for your scenario, not a guaranteed provider price or official decision.

How the payment gateway result is calculated

The calculator combines the entered quantities, rates and fixed costs to produce the displayed estimate. Reusing the same payment gateway inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.

Checks for a payment gateway decision

Confirm any current rate, threshold or provider rule that could change the final amount. For payment gateway, Use the estimate to compare card or payment costs. Check the provider’s current percentage fee, fixed fee, interest method, minimum charge and billing terms. Recheck the entered values and units if the result looks unexpected.

Language QA
Terminology, numeric values and calculator controls checked
Calculator scope
Cost estimation
Last English review
26 July 2026

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Kamnuanlek editorial team
reviewer
Kamnuanlek recipe and resource review team
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