ACH vs wire transfer: payment timelines and impact on LLC cash flow

ACH, domestic wires, international wires and Wise all move money differently. Plan LLC cash flow around timing, current fee terms, FX and proof of funds.

A US-domestic ACH transfer usually settles in 1 to 3 business days; ACH, wires and Wise should be chosen by current fee terms, receiving bank, currency and documentation.

Understanding payment timing helps you manage cash flow effectively. Here's a complete guide to how long different payment methods take with your LLC.

ACH payment timelines

ACH (Automated Clearing House) payments are processed in batches throughout the business day.

Standard ACH (next-day or 2-3 business days):

• Most common type
• Funds available next business day or within 2-3 days
• Low-cost on some US providers, depending on current terms
• Only works between US bank accounts

Same-day ACH:

• Available for transfers submitted before 2:30 PM ET on business days
• Funds available same day
• May have a small fee depending on bank, plan and processing window

Important: ACH only processes on US business days (Monday-Friday, excluding federal holidays). A payment sent Friday afternoon may not process until Tuesday.

Wire transfer timelines

Domestic wire (US to US):

• Submitted before cutoff time: same business day
• After cutoff time: next business day
• Mercury cutoff: approximately 5:00 PM ET
• Check the current provider tariff, cutoff, receiving-bank charges and correspondent-bank terms before confirming cost to a client.

International wire:

• Varies significantly by destination country
• Europe (SEPA-connected): 1-2 business days
• Latin America: 1-5 business days
• Asia: 2-5 business days
• Africa/Middle East: 2-7 business days
• Current terms depend on provider, destination, correspondent bank and receiving bank
• May involve intermediary banks which can add delays

Stripe payouts to Mercury

When you receive card payments through Stripe:

• Standard payout: 2 business days after payment received
• Instant payout: Available (small fee of 1%, min $0.50)
• Stripe deposits accumulate over 24 hours and pay out in one daily lump sum
• Weekend/holiday payments process on the next business day

PayPal to Mercury

PayPal to bank transfers:

• Standard: 1-3 business days
• Instant transfer: Small fee (typically 1.5%, min $0.25)

Wise transfers

Wise business transfers:

• To another Wise account: Usually instant
• To bank accounts: 1-2 business days (most major currencies)
• Some currency pairs: Same day
• Fees: Small conversion fee (0.4-1.5%)

Payment details for your clients

For US clients paying via ACH:

• Bank: Mercury's partner banks (Choice Financial Group / Evolve Bank & Trust)
• Routing Number (ACH): 117201490
• Account Number: [your Mercury account number]

For US clients paying via domestic wire:

• Routing Number (Wire): [see Mercury settings — different from ACH routing]
• Account Number: [your Mercury account number]

For international clients paying via wire:

• SWIFT Code: [see Mercury account settings]
• Bank Address: Mercury's partner bank as shown in your Mercury settings (typically Choice Financial Group, Fargo, ND or Evolve Bank & Trust, West Memphis, AR)
• Account Number: [your Mercury account number]

For European clients preferring SEPA:

• Use your Wise Business IBAN for EUR receipts
• Convert to USD in Wise
• Transfer to the US operating account through the available domestic rail after checking current terms

Mercury can be efficient for US wires, but “free” should never be treated as a universal rule. Domestic wires may avoid a Mercury platform fee depending on the current schedule, while international wires can still involve FX spread, intermediary bank charges, receiving-bank charges or routing conditions. Your funds are held with Mercury’s partner banks; always validate the current fee table before building the payment stack around one provider.

Managing cash flow with these timelines

For predictable monthly retainer clients: Set up recurring ACH or wire transfers. Know exactly when to expect payment.

For project-based billing: Invoice 7-10 days before you need the money. Give yourself buffer for payment processing.

For unexpected urgent needs: Mercury instant transfers to other Mercury accounts are immediate. Stripe instant payouts give same-day access.

Currency conversion timing: Convert currency through Wise when rates are favorable, not when you urgently need the money.

Payment method summary

IBAN vs. SWIFT vs. Routing Number: when to use each

Common payment collection mistakes

1. Sharing personal bank details: Always share LLC (Mercury) banking details, never personal
2. Using your local IBAN for USD collection: Use Mercury for USD, Wise for local currencies
3. Not specifying currency: Always state the currency on invoices (USD recommended)
4. Forgetting wire reference: Ask clients to include invoice number in wire memo
5. Not following up on pending payments: Mercury shows pending ACH/wire; follow up if delayed

Choose the payment rail by urgency and evidence

ACH, wire, card and FX have different timing and risk; the architecture must anticipate liquidity and reconciliation:

• Mercury: evaluate it by payment timing and operational fit: ACH, wires, incoming USD receipts, review response time and whether the LLC has a second route if a transfer is delayed.

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Payment speed matters, but compliance interpretation matters more. ACH, wire and card flows should match the LLC's commercial activity, documentation and risk profile so the account history looks normal to the provider reviewing it.

_More on this topic: LLC in the United States: complete guide for non-residents._

How Exentax matches payment rails to LLC cash flow

For payment timing, Exentax looks at the operating consequence: when funds settle, which rail was used, who can recall or review the transfer, how the client will reconcile it, and whether the business has a backup route if a payment is delayed.