
LLC estimated tax safe harbor in year one
Who pays estimated tax for an LLC, the 2026 due dates, the 90% and 100% safe harbor, the no-tax-last-year exception, and what differs for C corporations.
These guides cover federal tax returns and their deadlines: estimated payments in the first year, contractor reporting, partnership returns, and the penalties for filing late. Each guide cites the Internal Revenue Code, IRS instructions, or an IRS revenue procedure. The guides are listed in the order the deadlines arrive during a tax year.

Who pays estimated tax for an LLC, the 2026 due dates, the 90% and 100% safe harbor, the no-tax-last-year exception, and what differs for C corporations.

For payments made in 2026, the 1099-NEC threshold is $2,000, up from $600. Who files, which payments are excluded, and the exceptions that still apply.

When Form 1065 is due, the Form 7004 cutoff, the per-partner, per-month penalty for returns due 2024 through 2027, and relief after a CP162A notice.

Card payments have no 1099-K threshold. Payment apps and marketplaces report only over $20,000 and over 200 transactions, per platform. Here is how to tell.

A foreign-owned single-member LLC with no sales may still need to file Form 5472 in its first year. The test is a reportable transaction, not revenue.
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