Code 507 on an IRS transcript is an action code tied to Transaction Code 971, and it means the IRS has placed a hold on your account while it reviews your return. Your refund hasn’t been denied or taken back. It’s paused while the agency verifies the numbers you reported.
What the Code Actually Signals
The IRS tracks every action on your account using three-digit transaction codes posted to your transcript. Code 507 isn’t a standalone transaction; it rides along with TC 971, which the IRS uses to log administrative actions and notices.1Internal Revenue Service. Internal Revenue Manual Section 8C – Master File Codes
In plain terms, the agency has flagged your return for a closer look before processing your refund. Nothing has been decided about what you owe or what you’ll get back. The money is simply held.
This matters because some online sources call code 507 a “refund reversal.” That’s wrong. Actual refund reversals use different transaction codes: TC 841 for a cancelled refund check, TC 700 for a partial refund correction, and TC 807 for an overstated withholding adjustment. If 507 is what you see, your refund is being held pending review, not pulled back.
Why Returns Get Flagged
The IRS selects returns for additional review to check whether income, withholding, tax credits, and business income are reported correctly.2Internal Revenue Service. Understanding Your CP05 Notice A few situations trigger these holds more often than others:
- Income on your return doesn’t match the W-2s and 1099s employers and financial institutions sent to the IRS.
- You claimed refundable credits like the Earned Income Tax Credit or the Additional Child Tax Credit, which the IRS examines closely because of high error rates.
- Your reported withholding differs from what the IRS has on file.
- Your return shows deductions, credits, or income figures that look very different from prior years.
Being flagged doesn’t mean you did anything wrong. The IRS reviews millions of returns as part of routine verification, and many clear without any change. It just means the refund waits.
The CP05 Notice and What You Should Do
When this hold goes on your account, you should receive a CP05 notice in the mail confirming that the agency is reviewing your return and needs more time.2Internal Revenue Service. Understanding Your CP05 Notice
Here’s what surprises most people: the CP05 doesn’t ask you to do anything. No call, no documents, no response. The IRS specifically says to wait at least 60 days from the notice date before calling, and only then if you still haven’t received your refund or any further correspondence.2Internal Revenue Service. Understanding Your CP05 Notice
If the IRS needs specific documentation, it will send a separate follow-up notice telling you exactly what to send and by when. Until then, the refund stays on hold. When the review wraps up, one of two things happens: the IRS releases your refund as filed, or it sends a notice proposing changes.
How Long the Hold Lasts
There’s no fixed timeline. Some reviews finish in a few weeks. Others stretch for months, especially during peak filing season when the IRS is processing tens of millions of returns at once.
Treat the 60-day window in the CP05 as the baseline. If your transcript hasn’t changed and no new correspondence has arrived after that, calling the IRS is reasonable. You can watch your account by checking your transcript through your IRS online account. When the hold lifts, new codes will post. The one you want to see is TC 846, which means the refund has been issued. Adjustment codes mean the IRS changed something.
If the IRS Proposes Changes
When a review turns up a discrepancy, the IRS sends a notice explaining what it found and how it affects your tax. One of the most common is the CP2000, used when third-party income reports don’t match your return.3Internal Revenue Service. Topic No 652, Notice of Underreported Income – CP2000
A CP2000 is a proposal, not a bill. It shows the amounts you reported next to what the IRS has on file, names the payer and document type, and calculates the resulting change to your income and tax.4Internal Revenue Service. Understanding Your CP2000 Series Notice You have 30 days to respond, or 60 days if you live outside the United States.3Internal Revenue Service. Topic No 652, Notice of Underreported Income – CP2000
If you agree with the proposed changes, sign the response form and return it with payment for any extra tax owed. If you disagree, gather your supporting documents (W-2s, 1099s, receipts, bank statements) and respond in writing before the deadline. Explain why the IRS figures are wrong and send copies, not originals. Ignoring the notice is the worst option. The IRS will assess the proposed amount automatically and start collecting.
Interest and Penalties If You End Up Owing
If the review results in additional tax, interest and penalties run from the original due date of the return, not from when you receive the notice. That catches people off guard, because the review itself can take months and interest accrues the whole time.
The IRS underpayment interest rate adjusts quarterly. For the second quarter of 2026, starting April 1, the rate for individual taxpayers is 6%.5Internal Revenue Service. Internal Revenue Bulletin 2026-8 Interest compounds daily, so it grows faster than a flat annual rate suggests.
On top of interest, the failure-to-pay penalty is 0.5% of unpaid tax per month, capped at 25%. If the IRS later issues a final notice of intent to levy, the rate rises to 1% per month. Setting up an installment agreement drops it to 0.25% per month.6Internal Revenue Service. Collection Procedural Questions 3
If the IRS decides you were negligent or substantially understated income, it can also assess an accuracy-related penalty of 20% of the underpayment.7Internal Revenue Service. Accuracy-Related Penalty You can ask for penalty abatement if you have reasonable cause, such as relying on an incorrect W-2 from your employer with no way to know the figures were off.
If You Can’t Pay the Balance
If you end up owing more than you can cover, acting quickly limits how much the penalties and interest grow.
An installment agreement lets you pay in monthly installments. You apply using Form 9465. If you owe $25,000 or less, you’re generally eligible for a streamlined agreement without submitting detailed financial records. For balances between $25,001 and $50,000, you’ll need to agree to direct debit or payroll deduction. Balances above $50,000 require a completed Form 433-F with full financial disclosure.8Internal Revenue Service. Instructions for Form 9465
If your total tax debt is $10,000 or less and you’ve filed and paid on time for the past five years, the IRS must grant a guaranteed installment agreement as long as you can pay within three years.8Internal Revenue Service. Instructions for Form 9465
An Offer in Compromise lets you settle for less than the full amount if you can show you genuinely can’t pay it all. To qualify, you must have filed all required returns, made all required estimated payments, and not be in an open bankruptcy proceeding.9Internal Revenue Service. Offer in Compromise The IRS rejects most OIC applications, so it isn’t the default route, but it exists for taxpayers with limited ability to pay.
When to Bring In Help
Most code 507 holds clear on their own once the IRS finishes its review. If your situation involves large amounts, complex income sources, or proposed changes you believe are wrong, handling it alone isn’t always the best call.
The Taxpayer Advocate Service is an independent organization within the IRS that helps taxpayers resolve problems they can’t fix through normal channels. TAS defines financial hardship as situations where IRS action has caused or will cause negative financial consequences, including the inability to pay for housing, food, utilities, or transportation. If a held refund is creating that kind of pressure, submit Form 911 to request assistance. TAS asks that you first try to resolve the issue through normal IRS channels before reaching out.10Taxpayer Advocate Service. Submit a Request for Assistance
Tax professionals with Circular 230 credentials, meaning enrolled agents, CPAs, and tax attorneys, can access your transcript directly and represent you before the IRS. They’ll need a signed Form 2848 Power of Attorney on file.11Internal Revenue Service. Transcript Delivery System (TDS) Professional help is worth the cost when the proposed adjustment is large, when the IRS is questioning business income, or when you’ve already missed a response deadline and need to undo the damage.