Duet
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Pricing

One line of pricing.
No surprises.

No monthly subscription. No setup fee. No long contract. You pay per transaction — on the card side only — and the card-paying customer covers it.

Bank payments
$0from Duet, ever
Duet platform fee$0.00
Square's standard ACH1%, capped at $10

Duet never charges a fee on bank payments. Square's standard ACH rate (1%, capped at $10 per transaction) still applies — that's the only line on a bank payment.

Card payments
1%per card transaction
Duet platform fee1% of the card-side total
Square's standard processing2.9% + $0.30

The card-paying customer covers this — see the dual-pricing math on the home page. Your effective Duet cost on a $100 card transaction is roughly $0.30.

No monthly subscriptionNo setup feeNo long contractNo gateway fee
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Your numbers

What it costs you today.
What it costs with Duet.

Slide your inputs. The math updates live. Default Dual Price is 5% and default mix is 70% card / 30% bank — the rough split we see across active merchants.

Monthly payment volume$25,000
Average invoice size$200
Dual Price %5.0%
% paid by card70%
Monthly on $25,000 volume · 5.0% Dual Price
Square processing fees today
Card: 2.9% + $0.30/txn · Bank: 1% (capped $10/txn)
−$609
Your net with Duet
Card-payers cover the fees and then some — you net more than your base. Bank payments still incur Square's ACH rate.
+$57
What you keep with Duet
The monthly improvement — yours to keep.
+$666
$7,991 / year
At your inputs that’s 88 card and 38 bank transactions a month. Square’s processing rates apply to both paths; Duet’s 1% applies only on card.
Side by side

Savings at a glance.

What you’d net per month at various volumes — today absorbing fees, vs. with Duet at the default 5% Dual Price %. All-in math, including Square’s $0.30 per card transaction and 1% ACH rate.

Monthly payment volume
Lost today (to fees)
You keep with Duet
$10,000
−$244
+$266
$25,000
−$609
+$666
$50,000
−$1,218
+$1,332
$100,000
−$2,435
+$2,664
$250,000
−$6,088
+$6,659
Estimates assume an avg $200 ticket, 70% card / 30% bank mix, and 5% Dual Price %. Slide your own numbers in the calculator above.

Pricing questions.

All FAQs →
Is there a monthly subscription?
No. There is no monthly subscription, no setup fee, no contract. You pay 1% on card transactions and $0 on bank transactions — that's it.
When does Duet collect its fee?
Per-transaction, on the card side only, via Square's app-partner mechanism. There's no Duet invoice, no separate bill, no surprise charges.
Are there refund or chargeback fees from Duet?
No. Square's standard chargeback rules apply, but Duet doesn't add anything on top — including on refunds, voids, or disputes.
Can I change my Dual Price % later?
Yes. Slide it any time. The new percentage applies to invoices you create after that — historical invoices keep their original numbers.
Is there a minimum volume?
No. Duet works whether you send one invoice a month or a thousand.

Five minutes to set up.
Zero to walk away.

Connect Square, set your Dual Price %, send your first dual-priced invoice. No card on file, no commitment.

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