Tax calendar
Every federal and California filing date a small business needs, in one place. Click any highlighted date to see what it covers and who it applies to.
Dates move when they fall on a weekend or a federal holiday. If one of these affects you, check it against your own situation or ask us — an Enrolled Agent on our team handles these filings every year.
| Date | What’s due | Who it applies to |
|---|---|---|
| January 15 | Q4 Estimated Tax PaymentForm 1040-ES | Fourth quarter estimated tax payments are due for the prior tax year. Pay to avoid underpayment penalties when you file. |
| March 17 | S-Corp & Partnership Returns & K-1sForm 1120-S · Form 1065 · Sch. K-1 · Sch. K-3 | Filing deadline for S-Corporation and Partnership tax returns. Shareholders and partners must receive their Schedule K-1 and K-3 forms by this date. |
| April 15 | Individual, C-Corp Returns & Q1 Estimated TaxForm 1040 · Form 1120 · Form 4868 · Form 1040-ES | The main federal filing deadline for individual taxpayers and calendar-year C-Corporations. Also the due date for Q1 estimated tax payments for individuals, sole proprietors, partners, and S-corp shareholders who expect to owe $1,000 or more. File Form 4868 for an automatic 6-month extension. |
| May 15 | Non-Profit ReturnsForm 990 · Form 990-EZ · Form 990-N | Annual filing deadline for tax-exempt organizations. File your annual information return or request an automatic extension. |
| June 16 | Q2 Estimated Tax & US Citizens AbroadForm 1040-ES · Form 1040 · Form 1040-NR | Second quarter estimated tax payments are due. Also the extended filing deadline for US citizens and residents living abroad, plus the 1040-NR deadline for certain non-resident aliens. |
| September 15Extended deadline | Extended S-Corp & Partnership Returns + Q3 EstimateForm 1120-S · Form 1065 · Sch. K-1 · Form 1040-ES | Final extended deadline for S-Corporation and Partnership returns — no further extensions available. Q3 estimated tax payments are also due today. |
| October 15Extended deadline | Extended Individual Tax ReturnsForm 1040 | Final filing deadline for most individual taxpayers who filed for an April extension. No further extensions are granted — this is the absolute last date. |
| November 17Extended deadline | Extended Non-Profit ReturnsForm 990 · Form 990-EZ | Final extended deadline for exempt organizations. This is the last date to file your annual information return. |
| December 15Extended deadline | Extended Returns – Taxpayers Living AbroadForm 1040 | Final filing deadline for US citizens living abroad who received an additional extension. This is the very last date to file. |
Last reviewed [DATE_LAST_REVIEWED].
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