Your credit card processor plays an important role in the financial health of your thrift store. Processing fees, deposit timing, and POS integration all affect how much of each sale your store keeps.
Credit card processing for nonprofit thrift stores also involves specific needs a general retailer may not have. Volunteer cashiers run the register, and many stores collect monetary donations at checkout. That means choosing the right payment processor can make a big difference in keeping transactions simple for staff and convenient for customers.
This blog breaks down the top providers for nonprofits, so you can make the best decision for your store.
Jump to a provider:
Here’s how the seven providers stack up on pricing and processing before we dig into the details.
*Pricing verified September 2026. Confirm current rates and contract terms directly with each provider.
The table above gives you a quick read on cost and processing type. Picking the right fit for a nonprofit thrift store takes a few more factors, though. Here’s what to weigh before you commit:
Related Read: POS Payment Processing for Thrift Stores 101: The What, Why, and How
These seven options don’t all do the same job. Some combine POS software and payments, some process payments only, and a few handle online donations better than in-store checkout. ThriftCart comes first as the only option built for nonprofit resale. The rest follow in no particular order.
ThriftCart runs integrated payment processing built around how resale operates. Payments live inside the thrift store POS, so every sale is captured once. That cuts the double-entry and reconciliation work a standalone processor creates.
The plug-and-play terminal sets up fast, which matters when volunteers rotate through the register. One team supports both your POS and your payments, so nobody points fingers when you call for assistance.
Features:
Pricing: ThriftCart plans start at $99 per month, and integrated processing comes with every tier. Transaction rates are quoted per store, so build your custom POS to get your quote.
Stax charges a flat monthly subscription with zero markup on direct-cost interchange. Instead of a percentage on every sale, you pay one fee plus a few cents per transaction. A high-traffic thrift floor ringing hundreds of small sales a day saves real money here. The savings kick in once volume clears the subscription cost.
Features:
Pricing: Tiers run by annual volume. You pay $99 per month up to $150,000, $139 per month for $150,000–$250,000, and $199+ above that, and add roughly $0.08 per card-present and $0.15 per online sale. Run your own monthly volume against a flat-rate quote to see which comes out ahead.
Square delivers flat-rate pricing, no long-term contracts, and quick setup. A small thrift store can take cards the same day the hardware arrives. One flat rate keeps budgeting simple.
Features:
Pricing: The Free plan charges 2.6% + 15 cents in person and 3.3% + 30 cents online. Keyed transactions run 3.5% + 15 cents. Paid plans at $49 and $149 per month lower online rates. Square offers no standard nonprofit discount.
Stripe leans developer-first, with flexible online payments and deep fundraising integrations. It fits a thrift nonprofit running online donation drives or a web store alongside the floor. Setup often needs technical help.
Features:
Pricing: The standard rate runs 2.9% + 30 cents per online transaction. Verified 501(c)(3) organizations can apply for a 2.2% + 30 cents rate. That discount covers donations only, not resale sales, and excludes American Express. Stripe also requires that donations make up at least 80% of your volume.
Finix builds embedded payments for software companies, marketplaces, and larger operators that run payments under their own brand. This is infrastructure more than a turnkey register. It fits a multi-store thrift chain with developer resources, not a single shop.
Features:
Pricing: Subscriptions start around $250 per month. Higher-volume organizations can negotiate interchange-plus and custom options. Contact Finix directly for a quote.
Clover packages POS and payments into one system, with countertop and handheld hardware for the sales floor. The hardware is capable, but processing locks into Clover’s proprietary setup. Direct plans often carry 36-month contracts. A store that may switch systems should weigh that against the no-contract options here.
Features:
Pricing: Card-present rates run 2.3–2.6% + 10 cents by business type. Keyed and online sales run 3.5% + 10 cents. Retail hardware-and-software subscriptions run from $16 to $240 per month with a 36-month commitment. Direct plans often lock you into a 36-month contract with early termination fees.
Helcim runs on transparent interchange-plus pricing with no monthly, setup, PCI, or cancellation fees. With no fixed monthly cost, it suits a smaller thrift store where fees would otherwise eat thin resale margins. As sales grow, automatic volume discounts lower the rate further.
Features:
Pricing: In-person sales run interchange + 0.40% + 8 cents. Online sales run interchange + 0.50% + 25 cents. Volume discounts apply automatically above $50,000 per month, with no monthly fee.
Switching processors handles only half the job. Your cashiers, many of them volunteers, need to master the new system before launch. A little structured onboarding prevents checkout slowdowns and costly mistakes.
Concentrate training on the moments that go wrong at a busy register. Walk cashiers through the terminal basics, from running a sale to processing a refund. Give them hands-on practice before opening day.
Cover security habits, too. A volunteer should never write down a card number, and the customer should always tap or dip their own card. Chargebacks are a back-office job, so name a manager or administrator to monitor disputes and respond with documentation.
An integrated system like ThriftCart makes this easier. Staff learn one interface instead of a separate POS and terminal, and one support team answers every mid-shift question.
Related Read: 8 Volunteer Retention Strategies for Thrift Stores
Whichever provider you pick, the processing fee is only part of the cost. Every hour a volunteer spends matching register totals against a separate deposit is an hour off the sales floor.
ThriftCart removes that step. ThriftCart’s credit card processor runs inside the same system that rings up donations, tracks inventory, and prices your items, so each sale is recorded once. See how ThriftCart works for your store, and schedule a demo today.