The short version
- Use card volume from the merchant statement, not total sales.
- Count the full bill before calculating the rate.
- Review three months and explain unusual charges.
- Compare proposals against the same payment mix.
Tint shops accept cards at the counter, online, by link, and in the field. Those channels can carry different costs, so the base rate on a proposal is not enough.
A statement audit for owners comparing the advertised rate with the complete bill. For this review, use one recent window tint shop sale and the payment record that followed it.
Interactive owner tool
Tint Shops Effective-Rate Worksheet
Enter one statement period. Nothing is saved or sent.
- Settled card volume: example input 40000
- Complete processing fees: example input 1416
Open the live page to change the inputs. The calculation stays in the browser and uses only the values entered.
Rebuild the rate from the statement
Using the default worksheet values, tint shops with $40,000 in settled card sales and $1,416 in complete fees would calculate an effective rate of 3.54%. Replace both figures with numbers from the same statement period.
The advertised percentage is one line in a larger bill. A window tint shop needs the complete processing cost and the settled card volume from the same period. Dividing by total revenue gives a false answer when cash, ACH, checks, financing, insurer money, or open invoices are mixed in.
For tint shops, the boundary matters. Include completed card sales and card deposits once. Exclude cash, checks, ACH, financing proceeds, and unpaid bookings. Use a recent statement to confirm the amount.
Run window tint shop effective processing rate audit through one real transaction
Find a tint shop's real processing rate across counter sales, booking deposits, mobile payments, text links, monthly fees, gateways, refunds, and adjustments.
A statement audit for owners comparing the advertised rate with the complete bill. Do the review with a completed window tint shop transaction instead of a clean sales demo. Keep the original amount, payment method, customer-facing terms, change history, receipt, settlement record, and any later adjustment on the desk.
- Window Tint Shop Effective Processing Rate Audit, booking check: Show the payment choices before collecting a deposit, including online or mobile booking flows. Name the screen, document, and staff owner used at this point.
- Window Tint Shop Effective Processing Rate Audit, vehicle and film check: Record the vehicle, glass, selected film, shade, package, price, and applicable customer acknowledgment. Name the screen, document, and staff owner used at this point.
- Window Tint Shop Effective Processing Rate Audit, installation check: Keep approvals and payment records attached when the scope changes from tint to PPF, coating, or a bundle. Name the screen, document, and staff owner used at this point.
- Window Tint Shop Effective Processing Rate Audit, delivery and warranty check: Match the invoice, receipt, care instructions, film record, warranty paperwork, and any later remedy. Name the screen, document, and staff owner used at this point.
Use the Tint Shops Effective-Rate Worksheet
Open the tool with the source reports beside you. Enter the statement's settled card volume and complete fees in the worksheet. The result shows the all-in percentage for that month. Repeat the calculation for two more months and explain any large swing before averaging the results.
- Settled card sales for the exact statement period
- All fees withdrawn or invoiced for that activity
- Refunds and chargebacks shown on the statement
- Separate gateway, software, or equipment bills
- A note for annual or unusual charges
Tint Shops statement audit workflow
Run the review through one recent window tint shop transaction. The table follows the industry's normal handoffs, but the team should replace each label with the document or screen it uses.
| Decision point | What to check | Why it matters |
|---|---|---|
| Booking | Show the payment choices before collecting a deposit, including online or mobile booking flows. | Attach the statement audit record at this stage. |
| Vehicle and film | Record the vehicle, glass, selected film, shade, package, price, and applicable customer acknowledgment. | Attach the statement audit record at this stage. |
| Installation | Keep approvals and payment records attached when the scope changes from tint to PPF, coating, or a bundle. | Attach the statement audit record at this stage. |
| Delivery and warranty | Match the invoice, receipt, care instructions, film record, warranty paperwork, and any later remedy. | Attach the statement audit record at this stage. |
Records for the statement audit
Save these records while the transaction is still easy to trace. Waiting for a refund, cancellation, failed payment, or dispute turns a short filing job into detective work.
- Statement cover page and fee summary
- Deposit report used to reconcile card volume
- Separate invoices tied to payment acceptance
- The calculation for each month
- Questions the provider answered in writing
What BlueFinch would verify for tint shops
BlueFinch would compare every proposed percentage and fixed charge against the same window tint shop payment mix. Monthly, debit, PCI, gateway, batch, chargeback, software, and other account-specific costs may remain.
The current BlueFinch offer includes a standalone terminal at no charge, no equipment lease, no long-term contract, and no cancellation fee. Eligible configured credit-card transactions can carry a 0% merchant processing rate after the state, network, acquirer, written price display, and payment channels are reviewed.
Questions business owners ask
Should total business revenue be used in the effective-rate formula?
No. Use settled card volume from the merchant account. Include completed card sales and card deposits once. Exclude cash, checks, ACH, financing proceeds, and unpaid bookings. Use a recent statement to confirm the amount.
What if an annual fee lands in one statement?
Show it separately or allocate it consistently across the comparison period. Do not erase it, and do not treat one unusual month as typical.
When should tint shops stop this review and ask for help?
Stop when the statement, written price, customer document, terminal behavior, or receipt does not agree. The processor or acquirer should approve the exact setup before the window tint shop launches it.
Primary sources
BlueFinch reviewed these sources on August 11, 2026. Payment rules and state requirements can change.
- Visa: Merchant Surcharging FAQs
- Mastercard Rules
- Visa: Resolve a Dispute
- International Window Film Association: Dealer Resources
This page provides general business information, not legal, tax, or accounting advice.