Every payroll processor eventually runs into the same problem: a client’s ACH funding fails, returns unpaid, or arrives too late — and now employee direct deposits are at risk on your watch. NatPay’s reverse-wire service exists to take that risk off the table entirely. Once a client is set up, NatPay draws guaranteed wire funds from their account automatically, every cycle, with nothing for the client to remember and nothing for you to chase.
The Problem With Funding High-Risk Payroll Clients
Most payroll gets funded through standard ACH, and for the vast majority of clients that works fine. But a subset of clients don’t fit that model cleanly:
- New or financially inconsistent businesses where an NSF return is a real possibility, not a hypothetical
- Clients whose payroll totals swing significantly cycle to cycle, making pre-funding impractical
- Clients you’ve been burned by before, where a returned ACH debit meant your firm had to cover payroll out of pocket while you chased the funds
For processors carrying that risk, a single NSF return isn’t just an inconvenience — it can mean fronting an entire client’s payroll from your own reserves while the collection process plays out. That exposure is exactly what a reverse wire is built to close.
How NatPay’s Reverse-Wire Service Works
A reverse wire flips the direction of a normal transfer. Instead of your client sending funds to you, your client’s bank sends funds to NatPay on request — because your client authorized it in advance. Here’s the full sequence:
1. Client Authorization
Your client completes NatPay’s Reverse-Wires Authorization Agreement, naming their bank account and pre-approving NatPay to submit draw-down requests against it.
2. Bank-to-Bank Setup
NatPay submits your client’s information to our bank, which handles the reverse-wire relationship with your client’s financial institution. Their bank reviews and approves the client for draw-down processing — this is the step that typically takes the longest, since not every bank moves at the same pace on this type of setup.
3. Approval and Activation
Once your client’s bank confirms setup is complete, NatPay is notified and reverse wires can begin. From this point forward, no further action is required from your client for any future payroll cycle.
4. Draw-Down and Funding
For each payroll run, NatPay submits a reverse-wire request to our bank, which requests the funds from your client’s bank via Fedwire or SWIFT. Because it settles as a wire, the funds are good — not pending, not subject to return — the moment they land. Once received, NatPay funds the payroll file and employee deposits go out according to the file’s pay date.
5. Same-Day Cutoff
Reverse-wire requests need to be submitted by 4:30 p.m. ET for same-day processing. Keep in mind each bank sets its own internal cutoff for executing wires, so your client’s bank needs enough runway before both cutoffs to guarantee same-day funding — otherwise the request processes the next business day.
Reverse Wire vs. ACH vs. Standard Wire vs. Real-Time Payments
| Funding Method | Can It Bounce? | Manual Effort Per Cycle | Best Fit |
|---|---|---|---|
| ACH Debit | Yes — can return NSF for days after processing | Low | Stable, established clients with reliable balances |
| Standard Wire | No | High — client must initiate manually every time | One-off or infrequent high-value transfers |
| Reverse Wire | No | None after initial setup | Recurring, variable, higher-risk payroll clients |
| Real-Time Rails (FedNow, RTP) | No | Varies by bank | Growing option, but bank adoption for recurring draw-down-style payroll funding still lags behind wire capabilities |
Is a Reverse Wire the Right Fit for This Client?
A reverse wire earns its cost when a client’s payroll funding is high-risk, recurring, and variable in amount — all three at once. If a client only has one or two of those characteristics, there’s usually a cheaper fit:
- Not high-risk? Standard ACH is fine and costs less.
- Not recurring? A one-time standard wire is simpler than setting up a standing authorization.
- Not variable? A repeating wire for a fixed amount is more efficient than a draw-down arrangement.
Where all three overlap — a client you’re not fully confident in, funding payroll every cycle, for an amount that changes each time — a reverse wire is usually the clearest answer.
What It Costs
Expect a draw-down fee on NatPay’s side, and your client’s bank will typically charge them a wire fee for each authorized draw — generally somewhat higher than a standard outgoing wire fee. Ask your NatPay representative for current pricing so you can build the cost into what you quote the client, since this is a service the client is effectively paying for through reduced funding risk.
How NatPay Controls Fraud Risk
A standing authorization to draw funds is powerful, so NatPay treats every reverse-wire relationship as high-risk by design, not by exception:
- Every originating financial institution has to be specifically named and approved before it can submit draw-down requests against a client’s account
- Account details are matched exactly against what’s on file with the client’s bank — no partial matches
- NatPay has processed ACH and wire transactions since 1991 and is a SSAE 18 (SOC 1) Type 2 examined organization, meaning our internal controls around exactly this kind of transaction are independently audited every year
Frequently Asked Questions
How is a reverse wire different from a standard ACH debit?
A reverse wire settles as a wire transfer in real time and cannot be returned for insufficient funds. An ACH debit can return NSF days after you’ve already processed payroll, leaving you to cover the gap.
Does my client have to do anything after the initial setup?
No. Once your client’s bank approves the authorization, NatPay draws the funds each cycle automatically — there’s no recurring action required from the client.
How long does setup take?
It depends on how quickly your client’s bank processes the authorization on their end, since that step happens between their bank and NatPay’s bank rather than on a fixed NatPay timeline. Ask your representative for a current estimate.
What’s the cutoff time for same-day funding?
Reverse-wire requests must be submitted by 4:30 p.m. ET for same-day processing, and your client’s bank needs time to process the request before its own internal wire cutoff.
Can I set this up with a client whose bank is small or local?
It depends — not every bank supports draw-down processing, and smaller banks and credit unions are less likely to offer it. Check with your client’s bank before assuming it’s available.
What if I’d rather manage the reverse-wire relationship with my clients directly instead of through NatPay?
That’s an option too. See our guide, How to Set Up a Reverse Wire for Your Payroll Clients, for the step-by-step process of setting one up yourself rather than routing it through NatPay’s service.
