1040 Safe Harbor Checker
1040 Safe Harbor Checker
Did your client
hit safe harbor?
Enter 3 numbers from the prior-year return. Instant verdict on safe harbor status and balance due April 15.
Built by CPAs
IRS §6654 compliant
Zero data stored
🧮 39 tax pros helped
Client Inputs
2024 Form 1040 → Line 24
$
2024 Form 1040 → Line 11
$
Withholding + estimated
$
Enables penalty estimate + 90% current-year check
$
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