ACH vs Wire Transfer: What Nigerian Businesses Should Know Before Paying a US Supplier
Paying a supplier in the US from Nigeria usually comes down to a trade off between cost and speed, and the choice between ACH and wire transfer sits right in the middle of it.
The two run on different systems. That changes what you pay, how long the money takes and how much you can see along the way, which matters when you are managing cash for a business that buys from abroad.
This guide covers how ACH and wire transfers work, what each one costs, how fast each arrives, and when to use which. It also shows how Raiz Finance lets you send either one straight from Naira.
What is ACH?
ACH is a network that US banks use to send money to each other. It handles payroll, bill payments and supplier invoices, and most of it moves in batches during the day. That batching keeps costs low. It is also why ACH is slower than a wire.
A standard ACH payment usually takes one to three business days. Same-Day ACH is faster. All you need to send one is the recipient’s routing number and account number.
One thing to know: ACH is a US domestic system. A bank account in Lagos is not part of it.
What is a wire transfer?
A wire is a direct bank to bank transfer, handled one payment at a time. Inside the US, a domestic wire usually arrives the same business day, as long as it is sent before the bank’s cut-off time. Once it is processed, it is final.
An international wire works differently. It usually travels over SWIFT, often through one or more correspondent banks, and each one can take a fee or add a delay. This is the route most Nigerian bank transfers to the US take.
ACH vs wire transfer at a glance
| ACH | Wire transfer | |
|---|---|---|
| Where it works | Between US bank accounts | Domestic and international |
| Speed | One to three business days, or same day with Same-Day ACH | Usually same day |
| Cost | Usually lower | Usually higher, with a fixed fee per transfer |
| Can it be reversed? | Can be returned in some cases | Generally final once sent |
| Best for | Regular, routine payment | Urgent or high value payment |
| What you need | Routing number and account number | Wire routing number and account number, or SWIFT details for an international wire |
Which should a Nigerian business use?
It depends on how fast your supplier needs the money and how much you are paying.
ACH makes sense for routine orders where a day or two does not matter. The lower cost adds up when you pay the same supplier every month.
A wire makes sense when the payment is urgent or large, or when your supplier will not release goods until the money has landed. Because wires are final, they also give the supplier more comfort.
The more useful question for a Nigerian business is how you get the payment to either rail in the first place. Your bank cannot send an ACH payment. It can send an international wire, but that comes with intermediary fees, a rate you cannot always see up front, and a wait you cannot control.
What goes wrong when Nigerian businesses pay US suppliers
The wrong routing number. Many US banks use one routing number for ACH and a different one for wires. Using the wrong one can cause a delay or a rejection. Always ask your supplier which payment type they want, and copy the number from the invoice.
Money that arrives short. An international wire can lose a little at each bank along the way, so the amount your supplier receives may not match what you sent.
Name mismatches. If the name on your payment does not match the name on the supplier’s account, the bank can hold or return it.
Payment fraud. Wires are final, so they are a favourite for scammers who send fake “new bank details” emails. Before you pay, confirm any change in account details with your supplier by phone, using a number you already had.
Weekend and holiday gaps. US banks do not process most payments on weekends or US public holidays. A payment sent on Friday afternoon may not move until Monday.
How Raiz Finance handles US supplier payments
Raiz Finance lets you pay a US supplier straight from your naira balance. You do not need a US bank account and you do not need a domiciliary account.
You choose the rail that fits the payment:
Before you pay, you get a quote with the exchange rate locked in and the fees shown upfront. Raiz routes the payment through certified banking partners and lets you trace it from the moment you pay until your supplier receives it. Your supplier gets dollars in their US bank account and never deals with an agent.
If you import cars, the same setup lets you pay auction platforms such as Copart and IAAI, and shipping companies, directly from naira.
Paying a US supplier takes four steps: get a quote, choose your payment method, pay in naira, and track it until your supplier confirms.
- ACH for routine payments. This usually takes one to three business days.
- Same-Day ACH for payments that cannot wait a few days.
- Wire transfer for urgent or high-value payments. This settles the same day.
- RTP for instant payment, where the supplier’s bank supports it.
A quick checklist before you pay
Work through this before you send money to a US supplier.
- Ask your supplier whether they want ACH or a wire.
- Copy the routing number, account number and account name from the invoice.
- Check whether the routing number is for ACH or for wires.
- Confirm any change in bank details by phone before you send.
- Allow for weekends and US holidays in your timing.
- Keep your payment confirmation until the supplier acknowledges the money.
Frequently asked questions
Is ACH cheaper than a wire transfer?
Usually, yes. ACH runs in batches at low cost, while a wire carries a fixed fee for each transfer. For a one-off urgent payment, the speed of a wire can still be worth the extra cost.
Can I send an ACH payment from a Nigerian bank?
Not directly. ACH is a US system, and it needs a provider with access to US payment rails. Raiz Finance sends ACH payments to US suppliers from your naira balance.
How long does an ACH payment take?
A standard ACH payment takes one to three business days. Same-Day ACH and wires settle on the same day.
Can an ACH or wire payment be reversed?
A wire is generally final once processed. An ACH payment can sometimes be returned, for example if the account details are wrong. Either way, check the details before you send.
Do I need a US bank account to pay a US supplier?
Not with Raiz Finance. You fund in naira and the payment goes to your supplier’s US bank account.
Do I need a domiciliary account?
No. You pay straight from your naira balance.
Ready to pay your US supplier?
Get a quote at raizfinance.com/solutions/pay-suppliers, choose ACH, Same-Day ACH, wire or RTP, and pay in naira.
