IRS Letters and Forms
CP101

CP101 — Math error on Form 940 or 940EZ resulting in a net balance due.

Math error on Form 940 or 940EZ resulting in a net balance due.

What to do next

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CP101

Read the notice carefully and note any deadline. Gather returns, notices, and payment records. Book a free strategy session before responding if the amount is large, unclear, or collection language appears.

What the IRS language says

Math error on Form 940 or 940EZ resulting in a net balance due.

What it usually means

CP101 is in our IR Manual catalog. Official wording is dense — we translate it for business owners and individuals and map realistic next steps.

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