ACH vs Credit Card Fees: The Real Payment Method Math

ACH and bank transfers cost far less to accept than credit cards: typically under 1% (often a flat fee) versus roughly 2.9% plus a fixed amount per card transaction. On a large invoice, that difference is real money straight off your margin.

This guide breaks down the actual fees per method, shows the dollar cost at different invoice sizes, and gives you the break-even math for when to steer clients toward cheaper rails.

Quick summary

• Credit cards typically cost ~2.9% + $0.30 per transaction; ACH is often ~0.8% or a small flat fee.
• On a $5,000 invoice, that gap can be $100+ in fees per payment.
• ACH and bank transfers win on cost; cards win on speed and client convenience.
• The fee difference compounds fast on recurring retainer billing.
• Offer multiple methods, but default high-value invoices to ACH where you can.

The three rails, compared

Each payment method trades cost against speed and convenience.

Method	Typical fee	Speed	Best for
Credit card	~2.9% + $0.30	Instant	Small invoices, client convenience, deposits
ACH (bank debit)	~0.8%, often capped	1–3 business days	Large invoices, recurring retainers
Bank/wire transfer	Flat fee (varies) or free	Same day to a few days	Very large one-off payments

The headline: cards are convenient but proportional, so they get expensive as invoices grow. ACH stays cheap because it is often capped or flat.

What the fee actually costs you

Here is the same invoice paid three ways, using ~2.9% + $0.30 for card and ~0.8% (capped at $5) for ACH.

Invoice amount	Card fee (2.9% + $0.30)	ACH fee (0.8%, $5 cap)	You keep more with ACH by
$500	$14.80	$4.00	$10.80
$2,000	$58.30	$5.00	$53.30
$5,000	$145.30	$5.00	$140.30
$10,000	$290.30	$5.00	$285.30

On a $500 invoice the difference is a rounding error. On a $10,000 project payment, choosing ACH over card keeps nearly $285 in your pocket, per payment.

The break-even logic

The reason card fees hurt is that they are a percentage with no real ceiling, while ACH is usually capped. So the bigger the invoice, the more a card costs you relative to ACH.

A simple rule of thumb:

• Under ~$500: the fee gap is small; accept whatever is easiest for the client. Card convenience often wins.
• $500 to ~$2,000: the gap starts to matter; nudge toward ACH but don't force it.
• Above ~$2,000: ACH is clearly worth steering toward; the savings are real margin.
• Recurring retainers: always favor ACH. A 2.9% card fee on a $3,000 monthly retainer is ~$87 every single month, over $1,000 a year in fees for one client.

That recurring case is where most agencies quietly bleed the most, because the fee repeats forever on autopilot.

How to steer clients without friction

You want the cheaper rail without making payment annoying, which would cost you more in slow payments than you save in fees.

• Make ACH the default, card the option. Present ACH first on the invoice and the payment page, with card available for those who want it.
• Reserve card for deposits and small invoices, where convenience and speed matter more than the fee.
• Use ACH for retainers set up as recurring billing, where the monthly fee savings compound.
• Consider surcharging carefully. Passing card fees to clients is legal in some places and not others, and it can sour the relationship. Many agencies absorb the fee on small invoices and steer large ones to ACH instead.

Don't optimize fees into slow payments

The cheapest payment method is worthless if it slows you down. ACH takes a few days to clear, so for a deposit that gates the start of work, a card paid instantly can be worth the 2.9%, the project starts sooner and you avoid a three-day limbo.

The honest take that a "lowest-fee" guide won't give you: getting paid at all, fast, beats saving a few percent. If forcing ACH makes a client procrastinate or call their bank, the friction costs you more than the card fee ever would. Offer the cheap rail, but never at the price of a stalled payment.

Frequently asked questions

Is ACH cheaper than credit card for accepting payments?

Yes, almost always. ACH fees are typically under 1% and often capped at a few dollars, while credit cards usually cost around 2.9% plus a fixed amount per transaction with no cap. The larger the invoice, the bigger the savings from ACH.

At what invoice size does ACH start to matter?

The savings become meaningful above roughly $500 to $2,000 and significant above that. On a $5,000 invoice, ACH can save well over $100 in fees compared to a credit card, and on recurring retainers the savings repeat every billing cycle.

Should I pass credit card fees on to clients?

Surcharging is legal in some jurisdictions and restricted in others, and it can frustrate clients. Many agencies instead absorb the fee on small invoices and steer large or recurring payments toward ACH, where the cost is low to begin with.

Which payment method should I use for a deposit?

For a deposit that gates the start of work, a credit card's instant settlement can be worth its higher fee, since ACH takes a few days to clear. For large balances and recurring retainers, ACH's lower cost usually wins.

Related guides:

• How to invoice as an agency: the complete guide
• Recurring invoices for retainers
• How to invoice with a deposit