How Payment Timing Shapes Your Cash Flow

Start with the calendar, not with a number

Funding delay gets discussed as a rate question and it is not one. It is a question about which days money is capable of moving on, and those days are published by parties who are not your processor. Nacha states that the ACH Network is open for processing payments 23¼ hours every business day and settles payments four times a day, and that payments are settled when the Federal Reserve's settlement service is open — currently closed on federal holidays and weekends, and on business days from 6:30 p.m. ET to 7:30 a.m. ET. Everything a processor can offer sits inside that. Before negotiating funding speed, work out how many of your own trading days fall on the wrong side of those windows, because that is the part nobody can sell you out of.

What the Federal Reserve schedule actually says

The FedACH Processing Schedule, effective 12 September 2022, sets three same-day windows for eligible forward items: a 10:30 a.m. ET transmission deadline settling at 1:00 p.m. ET the same day, a 2:45 p.m. ET deadline settling at 5:00 p.m. ET, and a 4:45 p.m. ET deadline settling at 6:00 p.m. ET. Future-dated forward items have deadlines running through the evening — including an 8:00 p.m. ET deadline that occurs only Sunday through Thursday and not on Friday — and all settle at 8:30 a.m. ET on a future business day. The schedule's footnote is the sentence to remember: settlement for ACH items not eligible for same day occurs at 8:30 a.m. ET on the later of the next banking day, or the settlement date resulting from Appendix B of Operating Circular 4. A Friday afternoon batch and a Tuesday afternoon batch are not the same instrument.

Same Day ACH has a ceiling, and it is moving

Nacha states that Same Day ACH went live in 2016 and currently carries a $1 million per-payment limit, and that on 17 September 2027 that limit will increase tenfold to $10 million — a change it expects to expand use cases including merchant settlement. For a business whose funding arrives by ACH, that is a ceiling worth knowing rather than discovering: a single large settlement above the limit does not simply move more slowly, it takes a different path. Our same-day ACH guide covers what the rail does and does not do for a merchant, and our next-day funding guide covers the card side of the same question.

Constructive receipt: the date the tax code uses

The cash-flow calendar and the tax calendar are not the same calendar, and Publication 334 draws the line. "You have constructive receipt of income when an amount is credited to your account or made available to you without restriction. You do not need to have possession of it. If you authorize someone to be your agent and receive income for you, you are treated as having received it when your agent received it." It adds that you cannot hold checks or postpone taking possession from one tax year to another to avoid the tax, and must report income in the year it is received or made available to you without restriction. The phrase "without restriction" is what makes reserves and holds worth reading carefully, and the agent sentence is what makes the question of when your processor received the funds a question worth asking. This is general information and not tax or legal advice (September 17, 2026); confirm your own position with your accountant.

Refunds and reserves pull the other way

A refund leaves your balance on your instruction and reaches the cardholder on the issuer's timetable, so the two ends of it are never the same day. Whether the original processing fee comes back with it is a term of your merchant agreement rather than a card rule, and it is worth reading before assuming either answer. Reserves are the same shape of problem: the money is yours in the sense that it will arrive, and not yours in the sense that you cannot spend it, which is precisely the "without restriction" distinction above. Our guide to holds and reserves covers how they are set and released, and the refunds and voids guide covers why voiding before settlement avoids the round trip entirely.

An illustrative example of modelling it honestly

Illustrative example, made-up round numbers. A business batches $5,000 every trading day. If its funding lands one banking day after the batch, the amount in transit at any moment is roughly one day's batching; if two banking days, roughly two. That is arithmetic anyone can do on their own figures and it is the only figure worth quoting — the amount in transit, not a saving. Then overlay the calendar: a Friday batch that misses a deadline settles on the next banking day, and a long weekend adds another. Then overlay the exceptions: reserves held, refunds outbound, chargebacks debited. Nobody can tell you what improvement is available without seeing your agreement and your batch times; what you can do today is measure the in-transit figure and ask your processor to explain, against the schedules above, which days it is a calendar constraint and which days it is a choice.