Comparing payment processing offers takes more than checking the headline rate: the total depends on how customers pay, how much they spend, and what else the provider charges. Use your own sales records and a consistent calculation to estimate the cost of each schedule before you switch.
1. Gather the information you need
Start with a recent period that reflects ordinary business activity. If your sales change sharply by season, use more than one period—such as a busy month and a quieter month—so a single unusual week does not drive the decision.
Collect, where available:
- Total card sales and the number of transactions.
- Sales by payment method: in-person tap, chip or swipe; online checkout; keyed-in or phone payments; and any other relevant channel.
- Average transaction amount for each channel.
- Refunds, chargebacks, and voids.
- Your processor statements, invoices, and current contract or service terms.
- Any recurring costs, such as a monthly account fee, terminal rental, gateway charge, or software subscription.
Keep customer information out of your comparison worksheet. The totals and transaction counts are generally enough; you do not need card numbers, names, or other sensitive details to estimate fees.
If you have not started accepting payments yet, build a few scenarios from reasonable estimates: low, expected, and high sales volume. Mark them as estimates, then replace them with actual figures after you have enough operating history. A forecast cannot capture every pricing detail, so ask providers to show how they would calculate a sample month using the same assumptions.
2. Separate the parts of a fee schedule
A fee schedule may combine several charges. Write each one down and note what triggers it. The terms can differ between providers, so ask for plain-language definitions when a line item is unclear.
| Fee component | What to record | Why it matters |
|---|---|---|
| Percentage rate | Rate by payment channel or card category | A small difference can add up across high sales volume |
| Per-transaction charge | Amount charged per processed transaction | Often matters more when average purchases are small |
| Monthly or account fee | Fixed recurring amount and billing frequency | Applies even when sales are low or seasonal |
| Equipment or software | Rental, purchase, gateway, or subscription charges | May be separate from processing fees |
| Other charges | Refund, chargeback, setup, minimum, or optional service fees | Can affect the total and may have separate conditions |
Do not assume a quoted rate covers every card type or channel. Ask whether the offer is a flat rate, a tiered schedule, or interchange-plus pricing. These labels describe ways charges may be presented; they do not, by themselves, tell you which offer will cost less.
For a flat rate, the provider may quote a percentage plus a fixed amount for each transaction, with different terms for in-person and online payments. A tiered schedule groups transactions into categories, whose definitions and rates need to be understood. Interchange-plus pricing separates a card-network component from the provider’s markup and other charges. Request a sample statement or itemized example for the transactions you expect to process.
3. Calculate the cost using your sales mix
For each payment channel, estimate the percentage charge and transaction charge separately. A basic estimate is:
Estimated processing cost = (sales volume × percentage rate) + (transaction count × per-transaction charge) + fixed fees + other applicable charges
Suppose a business has a monthly sales volume of V, processes N transactions, and is quoted a percentage rate of r and a per-transaction charge of p. The simplified variable cost is (V × r) + (N × p). Use the rates in the provider’s written schedule, converting a percentage into a decimal for the calculation. Add the applicable fixed costs afterward.
Work channel by channel if the schedule has different rates for in-person and online payments. For example, calculate the in-person percentage against in-person volume and the online percentage against online volume. Then add the transaction charges using the corresponding transaction counts. This avoids applying a convenient headline rate to payment types that are actually priced differently.
Compare the effective cost
Divide the estimated total fees by the sales volume to get an approximate effective rate:
Effective rate = estimated total fees ÷ sales volume
This percentage is useful for comparing offers against the same sales pattern. Keep the estimated dollar total beside it: the effective rate can be harder to interpret when volumes differ, and it does not show whether a fixed charge will be burdensome in a slow month.
Use the same assumptions for every provider. If one estimate includes a monthly terminal fee and another omits equipment costs, the comparison is incomplete. Similarly, compare the same channels, transaction counts, average ticket sizes, and treatment of refunds.
4. Account for BC sales-tax concepts correctly
Payment processing fees and the taxes collected on a sale are different parts of the bookkeeping picture. Sales tax is generally an amount associated with the sale and the seller’s tax obligations; a processor’s fee is a cost of accepting and settling the payment. Do not count customer tax collected as if it were revenue available to cover processing costs without following your accounting method.
For a useful comparison, determine whether the sales-volume figure in your worksheet is the amount the processor uses to calculate fees. Some arrangements calculate fees on the full transaction amount, which may include tax or other amounts collected at checkout. Others may define the basis differently. Ask each provider how it treats the transaction total, refunds, tips, shipping, and other checkout amounts, and check the written terms. Do not assume that the processor’s fee is calculated only on the pre-tax item price.
When comparing the processor’s invoices, distinguish the service charge from any tax shown on that invoice. Tax treatment can depend on the service and the circumstances, so do not infer a tax result from a marketing page or a fee label. Keep invoices and statements with your business records, and ask a qualified tax professional or the relevant tax authority about how a particular charge should be recorded or treated. This article does not determine a business’s tax obligations.
If your checkout system reports gross sales, net sales, taxes, tips, and refunds in different fields, reconcile those definitions before using the totals. A mismatch can make one provider’s estimate look cheaper simply because the comparison used a different base.
5. Read the terms beyond the rate
A low quoted rate is only useful if you understand the conditions attached to it. Review the provider’s written schedule and agreement for:
- Different pricing for card-present, online, keyed, or manually entered transactions.
- How the provider classifies card types and whether those categories can change the rate.
- The timing and method of deposits, plus any stated settlement or reserve conditions.
- Refund and chargeback charges, and whether the original processing fee is returned after a refund.
- Minimum monthly charges, account fees, statement fees, or fees for optional features.
- Equipment ownership, rental period, warranty or support terms, and what happens when service ends.
- Contract length, cancellation process, early termination charges, and renewal terms.
- Whether the price is introductory, conditional on a volume, or subject to later changes.
Ask the provider to identify every fee that could apply to your expected payment types. If an answer is verbal, request it in writing or ask where it appears in the agreement. Keep the quote, fee schedule, and signed terms together so that later statements can be checked against what was offered.
Consider the operational fit alongside cost. A processor may need to work with your point-of-sale system, ecommerce platform, accounting workflow, or existing terminal. Confirm the exact models, software versions, and integration requirements with both vendors before assuming compatibility. A lower processing estimate may not be a saving if switching requires replacing equipment or losing a feature your business depends on.
6. Build a fair comparison worksheet
Create one row per provider and columns for the same inputs and outputs. Include the source and date of each quote, since schedules can change. A simple worksheet can contain:
- Monthly sales volume by payment channel.
- Transaction count and average purchase amount by channel.
- Percentage and per-transaction charges for each channel.
- Recurring costs and any likely one-time charges.
- Refund, chargeback, and other applicable charges.
- Estimated total monthly cost and effective rate.
- Contract term, cancellation terms, compatibility notes, and open questions.
Calculate at least two sales scenarios if your volume varies. A provider with a fixed monthly charge might compare differently during a quiet period than during a busy one. Likewise, a per-transaction charge can weigh more heavily when customers make many small purchases; a percentage charge can matter more when the average ticket or total volume is larger.
For example, imagine two schedules: one has a lower percentage but a higher per-transaction charge, while another has a higher percentage and a smaller transaction charge. The better fit depends on both monthly volume and transaction count. Plug your actual figures into each schedule rather than trying to decide from the direction of one fee alone.
Do not treat a processor’s sample calculator as an independent result unless you can inspect its assumptions. Verify the inputs, included fees, rounding, and excluded costs. If the provider’s estimate differs from your worksheet, ask which line items or classifications explain the difference.
7. Troubleshoot confusing statements and estimates
If a statement total does not match your estimate, work from the transaction and fee categories rather than assuming there is an error. Check whether the statement period matches your sales report, whether deposits cross month-end, and whether fees are deducted from settlements or billed separately.
Common causes of a mismatch include:
- A different percentage for online, keyed, premium, or otherwise distinct card transactions.
- A fixed fee charged for each transaction, including transactions that were later refunded.
- A monthly fee, equipment charge, or optional service omitted from the estimate.
- A fee calculated on a different transaction amount than the worksheet assumed.
- Chargebacks, reversals, or adjustments posted in a different period.
- Rounding or grouping that makes statement totals differ slightly from a simple estimate.
Ask the processor to explain the specific line items and the basis of calculation. Provide the statement date and line description, but avoid sending full payment-card details by ordinary email. If you still cannot reconcile the total, request a written breakdown or use the provider’s designated secure support channel.
If the statement suggests a different pricing category than the sales channel you expected, ask how the transaction was classified and what determines that classification. Do not assume all transactions can be moved into a lower-cost category; eligibility may depend on the method of acceptance and the provider’s rules.
8. Decide when a change is worthwhile
Compare the estimated savings with the practical cost and effort of switching. Include any equipment purchase or rental, setup work, staff training, integration changes, and time needed to update checkout procedures. These are business planning inputs, not necessarily fees on the processor’s statement, but they affect whether a change makes sense.
Before changing providers, confirm how recurring payments, stored payment methods, refunds on past transactions, and access to historical reports will be handled. These details vary by platform and agreement. Get the transition plan in writing, particularly if your business relies on subscriptions or needs to reconcile refunds after the switch.
Keep the decision reversible where possible: retain copies of statements and reports, record the date the new schedule starts, and review the first few statements against your worksheet. If actual volume or payment mix changes, recalculate with the new figures. A fee schedule that suited last year’s checkout pattern may no longer suit a business that has added online orders, changed average purchase size, or become more seasonal.