ACH
ACH is the US Automated Clearing House network — a low-cost, batch-based rail for moving money between bank accounts, settling in one to two business days.
ACH (Automated Clearing House) is the US bank-to-bank network for moving money in batches — the rail behind payroll, direct debits and most everyday transfers. It’s cheap and reliable, but not instant: payments clear in batches and usually settle in one to two business days.
How it works
- Payments are grouped into batches and processed at set times, not one by one in real time.
- An ACH credit pushes money out (paying a supplier); an ACH debit pulls money in (collecting a subscription).
- Same Day ACH can speed things up, but transfers still don’t move outside processing windows.
Unlike a wire, ACH can be reversed within network rules — helpful for errors, awkward for finality.
Why it matters
For paying suppliers, contractors and staff at volume inside the US, ACH is the default because the per-transaction cost is a fraction of a wire. The trade-off is timing: money leaves and arrives on the network’s schedule, not yours, so a Friday payout can land the following week. Cash-flow planning has to account for the lag.
How Fynex does it
Fynex uses ACH where it fits — low-cost, non-urgent US payouts — and routes to a faster rail only when the deadline demands it, so you’re not paying wire prices for ACH work. See payouts.