IRS 941 Lookback Period — Determining Your Deposit Schedule — Definition Glossary

Defined by Sarah Mitchell, CPA | Reviewed by: James Okafor, EA | Updated May 2026

Full Definition

The lookback period determines which payroll tax deposit schedule a business must follow — monthly or semi-weekly. The lookback period is the 12-month period beginning July 1 of two years before the current calendar year and ending June 30 of the prior year. If a business reported $50,000 or less in payroll taxes during the lookback period, it is a Monthly Depositor — taxes must be deposited by the 15th of the following month. If a business reported more than $50,000 during the lookback period, it is a Semi-weekly Depositor — taxes due on Wednesday, Thursday, or Friday paydays must be deposited by the following Wednesday; taxes due on Saturday, Sunday, Monday, or Tuesday paydays must be deposited by the following Friday. New businesses are always Monthly Depositors for their first year. The $100,000 One-Day Rule overrides both schedules: if accumulated taxes reach $100,000 on any day, they must be deposited by the next banking day regardless of normal schedule.

Why This Matters for Businesses With Tax Debt

Understanding IRS 941 Lookback Period — Determining Your Deposit Schedule is essential for any business owner navigating IRS enforcement or business tax debt. This term directly affects the resolution options available — including whether tax debt financing is a viable solution, how federal tax liens affect the business, and what the IRS can legally collect.

Related Tax Terms

• Payroll Tax Deposit Schedule
• IRS Form 941
• Failure to Deposit Penalty

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Sources: IRS.gov; Internal Revenue Code (IRC); IRS Publications 1, 594, 1660, 594. Tax Funds is a financing marketplace — not a lender, CPA firm, or law firm. Content is for informational purposes only and does not constitute tax or legal advice.