Letter 525

High Priority

30-Day Letter - Examination Changes Proposed

Proposed changes from an IRS examination. You have 30 days to respond.

Response Deadline

30 days from notice date

Respond before this deadline to avoid additional penalties and enforcement action.

What This Notice Means

Letter 525 is sent after an IRS examination (audit) when the examiner proposes changes to your return. You have 30 days to agree with the changes, provide additional information, or request an appeals conference. If you do not respond, a Notice of Deficiency will be issued.

Why You May Have Received This

  • 1Selected for audit
  • 2Business deductions questioned
  • 3Income verification
  • 4Large unusual deductions

Required Actions

1

Review the proposed changes carefully

2

Gather supporting documentation

3

Respond within 30 days

4

Consider requesting Appeals if you disagree

Your Options

Use these calculators to understand your situation and explore resolution options.

Consequences If Ignored

  • No response leads to Notice of Deficiency (90-day letter)
  • Additional penalties may apply

Tips & Best Practices

  • You have a right to appeal before a Notice of Deficiency is issued
  • Appeals is an independent function from Examination
  • Signing Form 870 waives your right to Tax Court

Related Resources

Legal References

IRC § 6212IRM 4.10IRM 8.1

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