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Key Tax Deadlines for January 2026 - Rancho Cucamonga

With the arrival of 2026, business owners across the Inland Empire region, including those in Ontario, Rancho Cucamonga, Upland, and nearby areas, should prepare for some crucial tax deadlines. Whether you're in real estate, medical practice, or trucking and logistics, staying ahead of these dates will help streamline your financial planning and tax compliance. Let’s delve into the key January due dates that individual taxpayers need to keep on their radar.

January 2 - Schedule Your Tax Appointment Early

As tax season kicks off, it’s essential to book your tax preparation appointment sooner rather than later. January is notoriously busy, so lock in your time with your accountant to avoid any last-minute rushes.

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January 12 - Tip Reporting Deadline

If you are a service industry employee who earned over $20 in tips during December, you must report these to your employer by January 12. Use IRS Form 4070 or provide a signed statement with all necessary details. Employers will then withhold FICA taxes and income tax from your wages based on these reported tips.

Any shortfall in withholding due to insufficient wages will be reflected in box 8 of your W-2 form. You will need to address this discrepancy when you file your annual tax return.

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Southern California Small Business Owners: Let’s Optimize Your Tax Strategy
Are you a small business owner in Inland Empire, Los Angeles, or Orange County? Let’s discuss tailored tax strategies designed specifically for small businesses in Southern California. Book your free consultation with a licensed CPA today.
Book Your Appointment

January 15 - Final Estimated Tax Payment for 2025

This is the deadline for the fourth quarter estimated tax payment for the previous year. Missing this deadline means you must file your 2025 tax return and settle your outstanding taxes by February 2, 2026, to preclude any estimated tax penalties.

Weekend & Holiday Considerations

If any due date falls on a weekend or legal holiday, the deadline will extend to the next business day that isn’t a holiday.

Extensions for Disaster Areas

In times of official disaster declarations, tax deadlines can be extended. For current information on disaster declarations and corresponding tax relief, visit the FEMA website and the IRS news page.

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Southern California Small Business Owners: Let’s Optimize Your Tax Strategy
Are you a small business owner in Inland Empire, Los Angeles, or Orange County? Let’s discuss tailored tax strategies designed specifically for small businesses in Southern California. Book your free consultation with a licensed CPA today.
Book Your Appointment
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