Key takeaways
- Online, Stripe wins on pure price at every ticket size (2.9% + 30¢): on a $100 sale you keep $96.80 vs $96.02 with PayPal Checkout — a $390/month gap at $50k in monthly sales.
- PayPal Checkout is the most expensive online rate (3.49% + 49¢) — but customers trust it. The smart move is running it as a second button, not your only processor.
- The headline percentage is the wrong number. The fixed per-transaction fee decides small-ticket costs: on an $8 sale, fixed fees eat 2–4× what the percentage does.
- Square wins for in-person selling (2.6% + 15¢) but has the worst free-tier online rate (3.3% + 30¢) of the three.
- The fees that actually hurt — chargebacks ($0–$20), account holds, and international surcharges — appear on none of the big comparison tables.
Why this choice costs more than you think
Most small businesses pick a payment processor once, early on, and never revisit it. That decision then taxes every single sale for years.
Here's the spread on one $100 online sale, using each processor's published US rate:
| Processor (online) | Published rate | Fee on $100 | You keep |
|---|---|---|---|
| Stripe | 2.9% + 30¢ | $3.20 | $96.80 |
| Square (Free plan) | 3.3% + 30¢ | $3.60 | $96.40 |
| PayPal (card) | 2.99% + 49¢ | $3.48 | $96.52 |
| PayPal (Checkout button) | 3.49% + 49¢ | $3.98 | $96.02 |
78 cents per sale doesn't sound like much. At $50,000 a month in online sales, Stripe vs PayPal Checkout is a $390-a-month difference. At $100,000 a month, it's $780. That's a part-time employee's salary, decided by a signup form you filled out once.
This post is written from the builder's side. We're the ones who wire these processors into actual websites and see where the money quietly leaks. The comparison sites rank well, but most of them skip the things that actually cost you: chargeback fees, payout holds, and what each one takes to set up on a real website.
The number everyone compares is the wrong one
Everyone compares the headline percentage: 2.9 vs 3.49. That's the wrong number to fixate on.
Every processor charges percentage plus a fixed fee in cents. The fixed fee is what actually decides small-ticket costs. On a $100 sale it's noise. On an $8 sale it runs the whole bill:
| Processor | Cost on an $8 sale | Effective rate |
|---|---|---|
| Square in person (2.6% + 15¢) | 36¢ | 4.5% |
| PayPal Zettle in person (2.29% + 9¢) | 27¢ | 3.4% |
| Stripe online (2.9% + 30¢) | 53¢ | 6.6% |
The rule: under ~$15 average ticket, hunt for the lowest fixed fee. Over ~$200, hunt for the lowest percentage. Most business owners do the opposite of whichever one applies to them.
This is why there's no single "cheapest processor." There is only the cheapest processor for your ticket size, your channel, and your volume. The math below works it out for the three most common processors.
The true cost, worked out for three ticket sizes
All figures below are each processor's standard published US online rate. In-person rates are in the next section.
| Processor | Published rate | On $25 | On $100 | On $500 |
|---|---|---|---|---|
| Stripe | 2.9% + 30¢ | $1.03 | $3.20 | $14.80 |
| Square (Free plan) | 3.3% + 30¢ | $1.13 | $3.60 | $16.80 |
| Square (Plus, $49/mo/location) | 2.9% + 30¢ | $1.03 | $3.20 | $14.80 |
| PayPal Checkout | 3.49% + 49¢ | $1.36 | $3.98 | $17.94 |
| PayPal (card) | 2.99% + 49¢ | $1.24 | $3.48 | $15.44 |
The takeaway is blunt: on pure price, Stripe beats every PayPal option at every ticket size online — both the percentage and the fixed fee are lower. Square's free plan loses to Stripe online at every ticket size too; Square Plus ties Stripe online, but costs $49 a month per location to get there.
So why does anyone use PayPal or Square? Because price isn't the whole story. Customers actively look for the PayPal button at checkout, and Square owns in-person. That's the honest trade, which the next sections cover.
The fees nobody quotes you
Comparison tables live on the headline rate. The fees below are where real money and real headaches hide — and most guides skip them entirely.
Chargebacks and disputes
| Processor | Dispute / chargeback fee |
|---|---|
| Stripe | $15 per dispute |
| PayPal | $20 per chargeback ($15 dispute fee on some channels) |
| Square | $0 |
If you're in a dispute-prone business — digital products, event tickets, anything with delivery friction — Square charging nothing per dispute is a genuine advantage. PayPal's $20 is the steepest of the three. Two chargebacks a month on PayPal cost more than the rate difference between PayPal and Stripe on $5,000 of sales.
Payout speed
| Processor | Standard payout time |
|---|---|
| Stripe | 2 business days (instant payout available for a fee) |
| PayPal | 1–3 business days to bank |
| Square | 1–2 business days |
For a business living week to week, one extra day of float matters. Square's next-day availability on card-present sales is the best of the three for cash flow.
Account holds and freezes
This is the one comparison sites won't touch, and the one we hear about most from clients. PayPal is notorious for sudden account holds — a spike in sales, a run of international orders, and your funds can be held for review with minimal warning. Stripe does the same thing when volume jumps abruptly; their fraud systems treat growth like an anomaly.
The practical defense costs nothing: don't keep operating cash sitting in a processor balance. Sweep payouts to your bank account on schedule, and before a big launch, tell your processor it's coming. We've watched a client lose a week of cash flow to a hold that a five-minute heads-up would have prevented.
International cards
If you sell outside the US, every processor adds a surcharge — and they differ more than the headline rates do:
| Processor | International card surcharge | Currency conversion |
|---|---|---|
| Stripe | +1.5% | +1% |
| PayPal | +1.5% | 3–4% built into the exchange rate |
| Square | Standard rate + 1.5% | Converts to local currency only |
PayPal's currency conversion markup is the quiet killer here: 3–4% on the exchange rate turns a competitive transaction fee into an expensive one for cross-border sellers. If international is more than a trickle of your revenue, Stripe wins by a real margin.
Keyed and manual payments
Typing a card number in by hand costs more everywhere, because the fraud risk is higher:
- Square: 3.5% + 15¢ for manually keyed or card-on-file payments
- Stripe: +0.5% on top of the standard rate for manually entered cards
- PayPal: keyed transactions billed at 3.49% + 9¢
If you take a lot of phone orders, this matters. If you almost never do, ignore it.
Each processor, honestly
Square: the default for in-person and mixed selling
Square's published US rates: 2.6% + 15¢ in person on the free plan, 3.3% + 30¢ online, with paid tiers buying the rate down (Plus: 2.5% + 15¢ in person, 2.9% + 30¢ online, $49/month per location; Premium: 2.4% + 15¢ in person, $149/month per location).
Best for: retail, food, salons, trades — anyone whose sales are mostly face to face. The free reader ($59), the one-dashboard setup, and zero monthly fees make it the easiest start in the industry. Watch out for: that 3.3% online rate, the highest free-tier online rate here. If your sales drift online over time, you can end up paying the in-person specialist's price for an online business.
Stripe: the default for online, subscriptions, and anything custom
Stripe's standard US pricing: 2.9% + 30¢ per successful online card charge, 2.7% + 5¢ in person through Stripe Terminal. No setup fees, no monthly fees, no closure fees. The catch isn't price — it's that Stripe assumes someone will do a little setup work, whether that's a developer, a WooCommerce plugin, or a hosted payment link.
Best for: online stores, subscription billing, marketplaces, and any business with a developer nearby (or a builder who isn't afraid of plugins). Watch out for: the $15 dispute fee, and the +1.5% international surcharge plus +1% currency conversion if you sell abroad.
PayPal: the most expensive online rate — and the most trusted button
PayPal's US merchant fees (updated July 2026): Checkout at 3.49% + 49¢, standard card payments at 2.99% + 49¢, card present via Zettle at 2.29% + 9¢, Pay Later at 4.99% + 49¢, micropayments at 4.99% + 9¢.
That 3.49% is the most expensive headline rate in this guide, and it's also the one many customers actively look for at checkout — especially older buyers and anyone who's been burned by a sketchy card form. The sensible move: run PayPal alongside a cheaper card processor, so you pay the premium only on the customers who genuinely want it. It typically adds a few percentage points of conversion for a fraction of your transactions.
Best for: a second checkout button, invoicing (built in and excellent), and small in-person jobs via QR codes. Watch out for: the account-hold reputation, the $20 chargeback fee, and the currency conversion markup on international sales.
Shopify Payments: only if you're already on Shopify
Shopify bundles processing into its plans: Basic $39/month gets you 2.9% + 30¢ online and 2.6% + 10¢ in person. The important number is the penalty for using anything else: 2% on Basic, 1% on Grow, 0.6% on Advanced, charged on every order on top of whatever the other processor charges. That fee is designed to keep you inside the ecosystem, and it works.
Best for: businesses already running a Shopify store. If you're weighing whether you need Shopify at all, read our honest breakdown of what an online store costs in 2026 first.
How to choose, in four questions
- Where do most of your sales happen? Mostly at a counter or on site → start with Square. Mostly online → start with Stripe. Roughly half and half → Square handles both acceptably on one dashboard.
- What is your average ticket? Under ~$15, pick the lowest fixed fee (PayPal Zettle's 9¢ in person is the lowest published). Over ~$200, pick the lowest percentage — and look hard at bank transfer instead of cards (below).
- Do you bill repeat customers? Subscriptions or memberships → Stripe's recurring billing is the best in the business. Invoices → Stripe and PayPal both handle them; Square Invoices works too.
- Is there a developer (or a developer-friendly builder) involved? Stripe's power needs setup. Square and PayPal are paste-a-button simple. Don't pay for power you won't wire up.
The sharpest insight in this guide: the cheapest processor and the right processor are usually different things. PayPal costs more per transaction and can still be the right second button, because a customer who trusts the button completes the purchase.
The invoice trick that saves 95% of the fee
If you invoice clients for large amounts — agencies, contractors, B2B services — stop running $5,000 invoices through card rails. Stripe's ACH bank transfer costs 0.8% capped at $5 per transaction. A $5,000 invoice costs $5 by ACH instead of $145.30 by card. PayPal charges 1% capped at $10 — still $10 instead of ~$175.
The catch: ACH takes a few days to clear, and it only works for customers willing to connect a bank account. For recurring retainers and big project invoices, it's the single biggest fee saving available to a small business. Almost nobody knows it exists.
What each one takes to set up on your website
This is the part no comparison site covers, because they don't build websites. We do, so here's the honest version:
| Processor | Setup effort on your site | Reality check |
|---|---|---|
| Stripe | Plugin or developer | On WordPress/WooCommerce it's a plugin install (~15 minutes). On a custom site it needs a developer. No-code fallback: Stripe Payment Links — a checkout page with zero code. |
| Square | Easiest | Payment links and a free online store are built in. If you can fill out a form, you can take payments today. |
| PayPal | Easy | The Checkout button is a paste-in snippet. Invoicing is built in and genuinely good. |
The honest advice: don't let setup effort pick your processor for you. A developer wires Stripe into a WordPress site in under an hour. If the cheaper rate saves you $200 a month, the one-time setup pays for itself in a day. And if there's no developer and no budget for one, Square or PayPal today beats Stripe "someday."
When to graduate to interchange-plus
Flat-rate processors bundle the card networks' wholesale cost (interchange), network fees, and their own margin into one number. An interchange-plus provider passes the wholesale cost through and adds a small stated margin. Providers like Helcim publish theirs: interchange + 0.40% + 8¢ in person, + 0.50% + 25¢ online, with $0 monthly fees.
The old advice says "flat rate until you hit some monthly volume, then switch." That's half wrong: when the interchange-plus provider charges no monthly fee, there's no volume gate to cross — ticket size is what matters, not volume. Interchange-plus beats Square's flat rate above roughly a $9 in-person ticket, because debit cards are genuinely cheap at wholesale. The real barrier is paperwork: someone has to read a statement and apply. For most businesses under ~$25,000 a month in card volume, the savings rarely justify the afternoon. Above that, get a quote — it's the only way to find out what your actual card mix costs.
The bottom line
Pick Stripe if you sell online and have someone to set it up. Pick Square if you sell in person and want the simplest possible start. Run PayPal as a second button for the customers who trust it — not as your only processor. And if you invoice big amounts, move them to ACH and keep 95% of the fee.
One last thing: a processor is a way to get paid, not a way to get sales. Online payments need a destination — a product page, a booking form, a checkout that doesn't leak. If your checkout is losing orders, the processor isn't the problem; read our guide to the 7 checkout killers leaking money from small stores. And if you're starting from zero, our free site audit will tell you exactly where your site is losing money — or book a call and we'll wire the whole thing up for you.
