Sales Tax Filing Deadline Calendar
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Sales Tax Filing Due Dates by State
Researched by the NexusFlag Research Team · Last updated: April 2026
Most US states require monthly sales tax returns due by the 20th of the following month, though filing frequency varies by state and sales volume. For example, a January filing period would result in a return due February 20 in most states.
Monthly filers (most common)
Monthly filers typically owe a return by the 20th of the following month. This applies to Texas, Illinois, Florida, Georgia, New York, and most other states. Some states differ: California uses last-day-of-month, Maine is the 15th.
- 20th of next month: TX, IL, FL, GA, NY, CO, AL, AR, and 20+ others
- 25th of next month: KS, NM, VT
- 15th of next month: ME
- Last day of next month: CA, WA, WI, WY, IA, NV, SD, UT
Quarterly and annual filers
Quarterly returns cover three-month periods. Most states require quarterly returns by the 20th of April, July, October, and January. New York quarterly filers follow a different schedule: March, June, September, and December.
- Standard quarterly: April 20, July 20, Oct 20, Jan 20
- CA quarterly: April 30, July 31, Oct 31, Jan 31
- NY quarterly: March 20, June 20, Sept 20, Dec 20
- Annual filers: typically January 20 of the following year
Key deadline facts
- Texas requires monthly sales tax returns by the 20th of the following month, for both monthly and quarterly filers.
- California (CDTFA) quarterly returns are due the last day of the month following the quarter end — April 30, July 31, October 31, and January 31.
- New York sales tax returns are due the 20th of the month following each reporting period for monthly filers, with quarterly due dates in March, June, September, and December.
- Washington State requires sales tax returns by the last day of the month following the reporting period under its B&O and Retail Sales Tax rules.
- Missing a deadline in most states triggers a 5–10% late penalty on the tax owed, plus interest that accrues monthly.
Due dates shift for weekends and holidays. When a standard due date falls on a Saturday, Sunday, or state holiday, the deadline moves to the next business day. Always check with your state's department of revenue for the exact deadline each filing period.
Common Questions About Sales Tax Filing Deadlines
When are sales tax returns due?
Most states require monthly sales tax returns by the 20th of the following month. Quarterly filers in most states are due in April, July, October, and January. California uses the last day of the month; New York quarterly returns are due in March, June, September, and December. Use this tool to see exact dates for every state you file in.
What happens if I miss a sales tax filing deadline?
Late filing typically triggers a penalty of 5–25% of the tax owed, plus monthly interest (usually 0.5–1% per month). Most states charge a minimum penalty even on zero-tax returns. Repeated failures to file can escalate to audits, automated assessments, or license revocation. Filing on time — even with a $0 return — is always the right call.
Can I change my filing frequency?
Yes. States assign filing frequency based on your tax liability — higher volume businesses file monthly. If your volume drops, you can usually request a change to quarterly or annual filing through the state DOR. Some states automatically reassign frequency each year based on your prior liability. Filing on a more frequent schedule than required is allowed and sometimes preferable for cash flow management.
Do all states have the same sales tax due dates?
No — due dates vary significantly by state. The 20th of the following month is the most common, used in Texas, Illinois, Florida, Georgia, and 20+ other states. But California and Washington use the last day of the month. Kansas and New Mexico are due the 25th. Maine is the 15th. New York quarterly returns follow a unique March/June/September/December schedule. This tool accounts for each state's specific rules.
Which states have no sales tax filing requirements?
Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. If you only sell in these states, there are no state sales tax returns to file. However, if you have customers in other states and exceed their economic nexus thresholds, you must file returns there regardless of where your business is based.
Monitor your nexus to know which states to file in
Knowing your deadlines is only half the battle. NexusFlag tracks your sales against every state's economic nexus threshold — so you know exactly where you're obligated to file.
Filing due dates are informational only. Actual deadlines may shift for weekends and state holidays. NexusFlag Research Team · Last updated: April 2026