Trial deposits are two small test credits, each under one dollar, that a bank, app, or brokerage sends to your account so you can report the exact amounts back and prove you own the account before any real transfers are allowed. The credits arrive through the ACH network within one to three business days, you type the amounts into the platform, and the platform then withdraws the same totals so your balance ends where it started. The process is simple, but attempt limits, expiration windows, and small timing quirks catch people out.
How the Verification Cycle Works
A routing number and account number by themselves don’t prove anyone can actually get into the account. Trial deposits close that gap. Only someone who can log in and see the transaction history will know the exact figures that landed.
The full cycle: you enter your bank details, the platform sends two micro-deposits through the Automated Clearing House network, the credits post to your account in one to three business days, you report the exact amounts back to the platform, and the platform withdraws those same amounts to zero everything out. Each stage has its own timing.
What You Need Before You Start
You need two numbers from your bank. The nine-digit routing number identifies the bank. The account number identifies your specific account and varies in length. Both appear at the bottom of a paper check or inside your bank’s app under account details.
Getting either wrong sends the deposits nowhere useful, and you won’t notice until days later when nothing has arrived. Check both numbers against your bank’s own records before submitting. If your bank publishes separate routing numbers for ACH and wire transfers, use the ACH one.
Finding the Deposits in Your Statement
Two credits will post within one to three business days. Each is less than one dollar. Under NACHA’s micro-entry rule, the credits are capped below a dollar by definition, so expect figures like $0.08 and $0.34.1Nacha. Micro-Entries (Phase 1)
To make the deposits easier to spot, NACHA requires the sender to use “ACCTVERIFY” in the transaction description and a recognizable company name.2Nacha. A Deep Dive Into Nachas Micro-Entry Rule Some platforms also use “VERIFY” or their own brand. Look for two separate line items, not a single combined credit. Write down or screenshot the exact amounts to the penny. $0.32 is not $0.33.
Entering the Amounts
Go back to the platform where you started. Your bank account should appear as “pending” or “unverified” in the linked accounts or payments section. Two empty fields will ask for the deposit amounts. Type them in exactly as they appeared in your statement and submit.
If the figures match, the account is verified and transfers can begin. If they don’t, you get another try, but most platforms allow only three total attempts. Three wrong entries typically locks the verification, forcing you to wait or start over. That cap exists to prevent brute-force guessing.
Trial deposits also expire. Platforms give you a set window to complete verification, and if you miss it the deposits expire and you have to re-initiate the whole process. The window varies by platform, so check the specific instructions you were given.
What Happens After You Verify
Once verification succeeds, the platform withdraws the same small amounts to bring your balance back to where it started. The reversals go through the same ACH network, and NACHA’s rule caps total debits at no more than total credits.1Nacha. Micro-Entries (Phase 1) The withdrawals usually post within a few business days of verification.
The amounts are small enough that a slow reversal costs you nothing meaningful. No minimum balance is required to receive or reverse the deposits. If verification never completes or the account is closed first, the platform simply writes off the trivial amount.
When the Deposits Don’t Arrive
This is where people usually get stuck. Before assuming something is broken, check:
- Timing. One to three business days means weekdays. If you started Friday afternoon, the earliest you’ll see anything is Tuesday or Wednesday.
- Routing and account numbers. A single transposed digit sends the deposits somewhere else. Verify both against your bank’s records.
- Account type and routing number mismatch. Some banks use different routing numbers for checking and savings, or for ACH versus wire. Use the ACH number for the correct account type.
- Fraud filters. Some banks and credit unions block unfamiliar small deposits. Call your bank if you suspect this.
- Pending versus posted views. A few banks hide micro-deposits until they fully post. Check both views in your app.
If nothing has arrived after five business days, contact the platform’s support team. They can confirm the deposits were sent and give you the ACH trace number, which your bank can use to track down the transaction.
Deposits You Didn’t Request
If micro-deposits appear in your account and you never started a linking process anywhere, treat it as a warning sign. Someone with your routing and account numbers may be trying to link your account to a platform they control. If they verify the amounts, they could begin pulling money out.
Steps if this happens:
- Call your bank right away. Report the unauthorized deposits and ask them to watch the account.
- Don’t confirm anything. Ignore any message asking you to verify deposit amounts or click a link. Verifying would complete the fraudulent link.
- File a complaint with the FTC at ReportFraud.ftc.gov so there’s a record and the pattern is tracked.
- Ask your bank about new account numbers. If your details are out in the open, replacing them is the cleanest fix.
Legitimate trial deposits always follow something you started. If you didn’t start it, nobody should be sending test credits to your account.
Instant Verification as an Alternative
Many platforms now offer instant verification alongside trial deposits. You log into your bank through a secure connection and the account is confirmed in seconds. Services like Plaid handle this by routing you to your bank’s own login or a secure authentication interface.
The speed gap is large. Trial deposits take one to three business days. Instant verification finishes in under ten seconds. The security model is also stronger: with OAuth-based connections, your bank issues a token granting limited access, so the platform never sees your password. If both options are offered, instant verification is the better choice. When trial deposits are the only option, the method is well-tested and safe as long as you finish it on time and keep the deposit amounts private.
Your Protections if Something Goes Wrong
Trial deposits run through the ACH network, so they fall under Regulation E, the federal rule covering electronic fund transfers.3Consumer Financial Protection Bureau. 12 CFR Part 1005 – Electronic Fund Transfers (Regulation E) Regulation E does not address micro-deposit verification specifically, but its broader protections apply: your bank must investigate unauthorized electronic transfers you report, and your liability is limited when you flag problems quickly.
On the sender side, NACHA’s micro-entry rule requires companies sending verification deposits to use commercially reasonable fraud detection, including monitoring the volume of micro-deposits they send and the reversals coming back.2Nacha. A Deep Dive Into Nachas Micro-Entry Rule If money leaves your account during the process that shouldn’t have, your bank is the first call, and the CFPB is next if the bank doesn’t resolve it.