Everything Square merchants need to know about flat-rate pricing, hidden fees, and when to switch.
Square uses a flat-rate pricing model that charges the same percentage regardless of card type. This simplicity comes at a cost for higher-volume merchants.
| Transaction Type | Rate |
|---|---|
| In-person (card present) | 2.6% + $0.10 |
| Online / e-commerce | 2.9% + $0.30 |
| Invoices | 3.3% + $0.30 |
| Manually keyed | 3.5% + $0.15 |
These rates apply to all card types — Visa, Mastercard, Amex, and rewards cards all cost the same. While this is predictable, merchants with mostly debit card transactions are effectively subsidizing the higher interchange cost of premium rewards cards.
Before comparing processors, understand how Square's flat rate compares to interchange-plus. Our complete credit card processing fee guide breaks down every fee type and what merchants actually pay.
Your effective rate is the total fees you paid divided by your total card volume. For Square merchants, the effective rate is typically:
Beyond the standard rate, Square charges additional fees that many merchants overlook:
Most merchants processing over $10,000/month pay significantly less under interchange-plus pricing:
| Pricing Model | Effective Rate | Monthly Cost (on $50k volume) |
|---|---|---|
| Square (flat-rate) | ~2.7% | ~$1,350 |
| Interchange-Plus (typical) | ~1.8% | ~$900 |
| Potential Savings | ~0.9% | ~$450/month |
With interchange-plus, you pay the actual Visa/Mastercard interchange rate plus a small fixed markup. For a merchant doing $50,000/month, that's roughly $450 in monthly savings — or $5,400 per year.
See our full merchant processing fee breakdown to understand how interchange, network fees, and processor markup combine.
Enter your monthly volume to see exactly what you're paying and how much you could save with better pricing.
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