Got an IRS Notice? Here’s the Actual Timeline for Responding and Getting Paid

A lot of filers feel a sense of dread the moment they get an IRS notice or letter asking for more information, action, or warning of a possible audit. The real question underneath that dread is almost always about timing: how long will this delay my refund, and how long do I actually have to deal with it.

Here’s the timeline the IRS actually works on, based on its own published guidelines.

IRS Notice Timing

Normally the IRS takes up to 30 days to complete an additional review before sending a formal notice — for example, a CP05 notice — to the filer.

During peak filing season (February through April), when processing delays are more common, the IRS has said cases needing special or manual handling can take 90 to 120 days. That covers returns with refundable credit amounts the IRS can’t resolve internally, returns missing significant information, and cases with suspected identity theft or fraud.

If your hold is specifically tied to identity verification — a 5071C or CP5071 letter — expect it to run on the longer end of that window. The IRS has leaned harder on identity and data-matching filters this filing season, and verified returns have still faced holds of up to 60 days after you complete verification, on top of whatever time already passed before you got the letter.

Tax Filer Response Timelines to IRS Notices

Generally, the IRS expects a response within 30 days of an official notice, though some notices set a specific date instead. Miss it and you risk interest charges, penalties, or — worse — losing your right to appeal.

Not every notice runs on the same clock, and mixing them up is an easy, costly mistake. A CP2000 (the underreported-income notice) typically gives you 30 days domestically, 60 days if you’re outside the U.S. A math-error notice — where the IRS corrects a calculation and assesses tax without an audit — gives you 60 days to challenge it, and starting in late 2026, a new law requires the IRS to spell out the error and that 60-day window more clearly than it has in the past. See the IRS’s CP2000 series notice page for the specifics on your own notice type.

What Happens After I Respond to the IRS

After you respond, it can take up to 60 more days for the IRS to review your response and close the case. That timeline shortens considerably if you respond promptly with accurate, complete information.

If you disagree with the proposed changes, you can appeal or request a meeting with an IRS examiner, but you have 90 days to reach a resolution before the IRS can issue a Notice of Deficiency. That 90-day figure is specifically about your right to petition Tax Court — it’s a different clock than the 60-day math-error window above, so check which notice you actually received before assuming your deadline.

When Will I Get My Refund Payment?

Once you’ve signed and returned an adjusted return, expect your refund or tax bill within 6 to 8 weeks of the latest notice date. If you owe money, IRS payment plans are available instead of a lump-sum payment.

I’ll keep this page updated if the IRS changes any of these windows — subscribe here to get notified.

When Can I Contact the IRS About a Notice or Letter?

Most of this can be handled without calling or visiting an office, but if you do need to call, use the number in the upper right-hand corner of your notice. Have your tax return and the notice itself in hand so the agent can pull up your account quickly.

Budget real time for this call — expect to be on hold for a while given the current staffing situation. The National Taxpayer Advocate’s 2026 report found average hold times climbing to around 14 minutes on the main taxpayer lines, up from about 8 minutes the prior year, following the roughly 27% reduction in IRS staffing. Some individual lines have run considerably longer during peak weeks. If you’re just checking status rather than resolving a dispute, the IRS’s online account tools are faster than calling.

If you’re writing in instead, allow at least 30 days for a response to correspondence sent to the address on your notice.

Looking Ahead: 2027 Filing Season

I’d expect these response windows to hold steady — they’re set by statute and IRS procedure, not by year — but two things are worth watching. The new math-error notice disclosure requirement phases in through late 2026, so notices issued for the 2027 filing season should come with clearer explanations of your 60-day window than in past years. And if IRS staffing stays reduced, I wouldn’t expect phone wait times to improve; lean on the online account tools where you can.

I’ll update this page once the IRS publishes new phone-service or processing-time data for the 2027 season.

Common Issues to Watch Out For

• Confusing the 60-day math-error window with the 90-day Tax Court deadline. They’re triggered by different notices and give you different rights — a math-error notice has no right to petition Tax Court, while a Notice of Deficiency does.
• Assuming “30 days” always means the same thing. Some notices set a specific calendar date instead of a rolling 30-day window — always check the actual date printed on your notice.
• Waiting on hold instead of using online tools. For simple status checks, your IRS online account is faster than the phone line this filing season.
• Sending a response late without calling ahead. If you’re going to miss a deadline, call the number on the notice before it passes — it’s better than letting it lapse silently.