The Parts of a Payment Fee
A payment fee usually has three parts. A percentage-based fee is calculated from the order value, so it increases as the customer spends more. A fixed per-transaction charge applies once to each transaction, regardless of order value. Separately stated costs are additional line items in the payment agreement or statement. Do not fold them into the percentage or fixed charge unless the provider explicitly does so.
Use the fee structure to calculate the cost of each delivered order: percentage charge plus fixed charge plus any applicable separately stated costs. Check whether figures are quoted inclusive or exclusive of GST. business.gov.au (Australian Government) states that GST is a tax of 10% on most goods and services sold or consumed in Australia, with registered businesses collecting the GST portion as one-eleventh of the sale price. Keep the GST treatment separate from the underlying payment fee when comparing your order economics (Source: business.gov.au (Australian Government)).
| Measure | How to calculate it | When it matters |
|---|---|---|
| Percentage-based | Order value × stated percentage | When order values vary or you are testing pricing and basket size |
| Fixed per transaction | Stated amount × transaction count | When comparing low- and high-value orders |
| Separately stated cost | Add each documented applicable line item | When reviewing the full provider statement or agreement |
Why Low-Value Orders Suffer Most
A fixed charge takes the same dollar amount from every transaction, so it consumes more of a low-value order. For illustration only, assume a fee of 2% plus $0.30. On a $20 vegan snack order, the fee is $0.70, or 3.5% of revenue. On a $60 order, it is $1.50, or 2.5%. The percentage component triples with the order value; the fixed component does not.
The margin effect is clearer after product costs. Suppose both orders have a 40% gross margin before payment fees. The $20 order produces $8.00 before the fee and $7.30 after it, leaving a 36.5% margin. The $60 order produces $24.00 before the fee and $22.50 after it, leaving a 37.5% margin. The larger order pays more in total, but the fixed charge is less damaging relative to its revenue and gross profit.
This is why small baskets, single-item purchases and heavily discounted orders need separate attention. A fee that looks minor at store level can remove a disproportionate share of contribution from those transactions. Review payment cost by order value alongside product and fulfilment costs before deciding whether a low-value order is genuinely profitable.
Worked example with sample numbers
This example is illustrative. It uses sample numbers for a vegan food store selling in Australia. They are made up to show the method, they are not a benchmark, and your own figures will differ.
Formula: Payment fee = order value x percentage + fixed amount.
| Order value | Fee | Fee as share of order |
|---|---|---|
| A$20.00 | A$0.95 | 4.7% |
| A$39.99 | A$1.44 | 3.6% |
| A$79.99 | A$2.43 | 3.0% |
| A$239.97 | A$6.39 | 2.7% |
Run the same sum with your own numbers in the free calculator, or browse guides for sellers in Australia and more vegan food guides.
General information only: tax, duty and import rules change and depend on your situation, so check with an accountant or the official source before acting.
Eligible Shopify stores can see these numbers for their own store through the Founding 10,000 offer.
How to Read the Worked Example
Read the worked AUD example from left to right. Start with the gross order value: the full amount charged to the customer before payment costs are removed. Then identify each fee component separately, the percentage charge applied to the relevant order value, the fixed transaction charge, and any other stated payment cost. Keeping these lines separate shows which part changes with basket size and which part is charged per transaction.
Next, add the fee components to get total payment fees and subtract that total from gross order value. The result is net proceeds: the amount left from the transaction after payment processing, not profit. Product costs, fulfilment, packaging, advertising, refunds and other operating costs still need to be considered before judging the order’s margin.
Finally, calculate fee share as total payment fees divided by gross order value, expressed as a percentage. This measure lets you compare the payment deduction with the order’s value, while the dollar total shows its direct cash impact. Use the profit margin calculator to test the same structure with your own Australian order data.
Refunds, Chargebacks and Currency
A refund does not necessarily return the original payment cost. Depending on the provider’s terms, the percentage component may be reversed while a fixed processing amount is retained; a partial refund may also leave part of the original fee attached to the order. Record the refund value, refunded payment cost and any difference separately. A chargeback is different: the transaction may be reversed and a dispute fee added, even when the customer’s claim is later resolved. Compare chargeback cost with chargeback value, not just the store’s refund rate.
Keep Australian-dollar domestic orders separate from international transactions. An overseas order can include a currency-conversion spread, cross-border fee or settlement adjustment that does not apply to an Australian cardholder paying in AUD. Analyse the order in its transaction currency first, then translate revenue, refunds, fees and product costs using one documented reporting rate. Otherwise, exchange movements can look like a change in payment performance. ORVX keeps each merchant’s trading currency separate and reports refund value against realised revenue from delivered orders, so returned or cancelled orders do not inflate the domestic margin view.
How to Compare Providers Fairly
Compare providers on an identical transaction set, not on headline percentages. Use the same order values, for example, $30, $75 and $150, then apply the same payment methods and order mix to each option. Keep the basket, transaction count and sales channel constant. Record whether each quoted fee includes GST, noting that business.gov.au says GST is 10% on most goods and services in Australia. Also define whether international, currency-conversion, settlement and chargeback costs are included or excluded (Source: business.gov.au (Australian Government)).
Use the same refund assumption, such as 5 refunds per 100 orders, and document whether the provider reverses any fee component. Report three measures: fee dollars per order for fulfilment and pricing checks; effective fee rate, calculated as total payment costs divided by gross processed sales, for comparing different order values; and total monthly payment cost for budgeting at your actual volume. A blended result using your real payment-method mix is useful for planning, while a method-by-method result shows where the difference comes from. Keep gross sales, refunds and fees in separate columns so a provider cannot appear cheaper merely because one calculation excludes returned orders or a fee category.
Turning Fee Analysis Into Margin Decisions
Turn the fee comparison into a contribution decision, not a standalone cost target. For each order, separate realised revenue, payment cost, food cost, delivery, advertising and operating overhead. A payment fee may explain a weak result on a small basket, but it does not explain expensive ingredients, a costly delivery route or inefficient labour.
A minimum order value is the right test when low-value orders repeatedly leave too little after variable costs. Model the basket at several values and check whether the extra revenue covers the added food, packaging, delivery and payment costs. A bundle is more useful when complementary products can raise basket value without adding comparable fulfilment cost.
Payment-method choices should be reviewed by order mix and customer behaviour, not headline rate alone. Keep a method if its conversion or customer value supports the extra cost; test alternatives where the fee difference is material and demand is unlikely to change significantly.
Review prices when product or collection margins remain weak after separating payment costs from food and operating costs. ORVX can show profitability by product and collection; use the profit margin calculator to test the arithmetic before changing a price.
Payment fees should be assessed against the order values and transaction outcomes a vegan food store actually handles. Separating percentage charges, fixed costs, refunds, chargebacks and currency effects makes the comparison clearer and shows which margin decisions each measure can support.
Sources
- Register for goods and services tax (GST) (business.gov.au (Australian Government), checked 26 October 2026).
How this page was made: drafted with AI from a brief, then checked by automated rules for arithmetic, sources and duplication. The sample numbers were calculated, not reported.