Seasonal payment-cost comparison
Model slow, normal and busy months separately instead of multiplying the peak month by twelve.
Use the interactive tool without signing up. It runs in your browser: enter your numbers, save a comparison, download results or print a working copy. Your numbers are not sent to BlueFinch.
Illustrative example inputs
These starting values show how the math works. They are not industry averages, customer results or a quote.
| Input | Example value |
|---|---|
Slow-month settled card sales Illustrative monthly card volume, not total business revenue. | $20,000.00 |
Normal-month settled card sales May differ from slow or busy volume; labels do not enforce an ordering. | $50,000.00 |
Busy-month settled card sales The higher-volume example is not an annual forecast. | $90,000.00 |
Current variable effective rate Simplified variable cost component. Include excluded transaction costs in a supported equivalent assumption. | 3% |
Current fixed monthly cost Recurring costs not already in the variable rate. | $60.00 |
Replacement variable rate assumption Zero is only the article scenario. Use verified written costs; unknown is not zero. | 0% |
Replacement fixed monthly cost All fixed recurring replacement costs included in this comparison. | $120.00 |
Maximum months in this planning window A period of up to twelve months. Unassigned months are excluded, not silently treated as savings. | 12 |
Slow months included Whole months in this window. | 4 |
Normal months included Whole months in this window. | 4 |
Busy months included The three counts combined cannot exceed the planning window. | 4 |
One-time transition costs Deducted once from the selected-period result, even if no recurring months are modeled. | $0.00 |
Example results
| Measure | Result |
|---|---|
Slow-month recurring improvement | $540.00 |
Normal-month recurring improvement | $1,440.00 |
Busy-month recurring improvement | $2,640.00 |
Selected-period change after transition costs | $18,480.00 |
Calculation detail
| Measure | Result |
|---|---|
| Slow-month current cost | $660.00 |
| Slow-month replacement cost | $120.00 |
| Slow-month current effective rate | 3.3% |
| Normal-month current cost | $1,560.00 |
| Normal-month replacement cost | $120.00 |
| Normal-month current effective rate | 3.12% |
| Busy-month current cost | $2,760.00 |
| Busy-month replacement cost | $120.00 |
| Busy-month current effective rate | 3.07% |
| Months actually modeled | 12 |
| Current cost in modeled months | $19,920.00 |
| Replacement recurring cost in modeled months | $1,440.00 |
| Recurring improvement before transition costs | $18,480.00 |
| Unsupported peak-only illustration: twelve busy months | $31,680.00 |
Model assumptions
- Starting figures are fictional planning examples, not a quote, verified outcome or small-business margin benchmark.
- This simplified model uses a variable percentage and fixed monthly charge. It does not automatically classify debit, refunds, tax, transaction fees or channel differences.
- Only the entered months are modeled. No benefit is assumed before implementation or in unassigned months.
- Enter remaining or proposed charges only after checking written terms. Blank unknowns are not zero; all fields must be completed before calculation.
- Cost differences are not a cash-flow forecast or a guarantee of payment approval.
Read alongside these results
- Negative differences remain visible. A negative profit denominator gives a signed mathematical ratio, not a share of positive profit. Zero denominators are unavailable.
- Negative improvement means higher modeled costs. Do not hide the slower month or annualize only the best one.
Download this worked example (CSV). Use the interactive version to export your own inputs and results.
The processing proposal lands after your busiest month. The savings look large, and multiplying them by twelve makes the yearly number look even better. But if your shop is seasonal, that shortcut can miss the months when fixed account costs hit hardest.
Demand shifts through the year for tint shops, RV specialists and some wellness businesses. So test payment costs in a slow month, a normal month and a busy one before you decide what the payment-cost change is worth.
Use with this guide
monthly cost audit
Continue with monthly cost audit.
whole-account cost guide
Continue with whole-account cost guide.
business dashboard
Continue with business dashboard.
Machine-shop monthly minimums: compare a quiet month
When collection volume is low, check the machining merchant account’s monthly minimum. Use the cost worksheet to separate its written minimum logic from other charges.
Check your own costs: calculate your effective processing rate or upload a merchant statement for analysis.
Separate fixed and variable costs
Check the processor’s statements for percentage-based charges, transaction charges, and recurring account fees. Put each annual charge in the month it was billed. If you’re building a normalized comparison, show its monthly equivalent separately. Don’t hide the charge just because it makes one statement look unusual.
The IRS recommends keeping records that back up financial statements and track business performance. They help you tell seasonality from a new fee. In a low-volume month, a fixed charge gets spread across fewer card sales, so your effective rate can rise. That doesn’t necessarily mean the percentage markup changed.
Sources for this section: IRS: business recordkeeping
Build three fictional scenarios
Assume a current arrangement costs 3% of card volume, plus $60 a month. At $20,000 in volume, you pay $660. At $50,000, the cost is $1,560, and at $90,000, it’s $2,760. That works out to effective rates of 3.3%, 3.12%, and about 3.07%, respectively. These are teaching figures, not advertised BlueFinch prices.
Now, say an approved replacement removes the modeled variable merchant processing charge but leaves $120 in monthly account costs. The illustrated improvements are $540, $1,440 and $2,640. Use the busy-month calculation alone and you get $31,680 over twelve months. But that figure only holds if every month looks like the busy one and the other assumptions hold.
Model the year you expect to operate
If the business expects four months at each of those three volume levels, the illustrated recurring improvement for the year is $18,480. That’s four times $540, $1,440 and $2,640 added together. Subtract any one-time transition costs separately. And if implementation starts halfway through the year, don’t claim twelve months of benefit.
The monthly cost audit annualizes one entered month, assuming all twelve months are identical. It’s useful for one scenario, but it doesn’t automatically build a seasonal forecast. Run each scenario separately, then combine them in your own worksheet. The whole-account cost guide helps spot charges that belong in every scenario.
Sources for this section: BlueFinch: Savings Audit methodology
Watch cash timing as well as profit
Lower annual expenses don’t fix every slow-season cash problem. Settlement timing, receivables, stock purchases and payroll dates still matter. Keep processing decisions separate from your cash-flow forecast. Expected savings aren’t money in the bank until the related costs and collections have happened.
Use your business dashboard to review records available on your enabled account. Check the source date and look for missing connections. Compare the first slow month after a change with a similar period in the past. Note differences in card volume, transaction count, and payment mix before attributing the whole change to a new processor.
The decision is stronger when the slow-month numbers still work. It gives the owner a realistic expense plan and avoids committing peak-season savings to a year-round obligation the business cannot support.
Keep a separate note on unusual closures, big commercial jobs, or delayed expenses in the period you picked. Those events don’t make your records wrong. They explain why an accurate monthly ratio might be a poor guide to the next month.
Primary sources
BlueFinch last reviewed these sources on October 23, 2026. Check the linked sources for current requirements and product details.
Use this page for general business information. It is not legal, tax, or accounting advice.