Tax season always brings a flurry of forms, filings, and acronyms, but heading into 2026, small business owners also need to be aware of a few important changes that could impact how (and when) they file.

Whether you’re sending out W-2s, preparing 1099s, or making estimated payments, a little preparation now can go a long way toward avoiding penalties and making tax season run smoother. Here’s what to have on your radar.

The Big One: Your 2025 Federal Tax Return

The official deadline to file your 2025 federal tax return is April 15, 2026. That’s also the due date for your first estimated tax payment for the 2026 tax year. For C corporations, individuals, and many self-employed business owners, this is the filing date to plan around.

If your business is structured as an S corporation or partnership, you’ll need to file a bit earlier, by March 16, 2026 (since the 15th falls on a Sunday that year). As always, if you need more time, you can request an extension, but it’s important to remember that filing an extension doesn’t give you more time to pay. Any taxes owed are still due on the original deadline.

Many small business owners wait until March or even April to get everything in order, but that’s often when accountants are at their busiest. Having your documentation ready in January or February can make a big difference in turnaround time, and your peace of mind.

W-2s: Don’t Miss the Filing Window

If you have employees, you’re required to issue W-2 forms by February 2, 2026. That includes sending copies to your employees as well as filing with the Social Security Administration. Even if you outsource payroll, it’s your responsibility to make sure these filings are submitted accurately and on time.

For the 2026 season, there’s an added detail to note. Employers submitting W-2s electronically now need to include a contact name, email address, and phone number on the form. It’s a small change, but if your payroll provider hasn’t updated their system to accommodate this, it could slow things down.

Best practice? Review your employee information now, and make sure you’re not missing any updated addresses or details before year-end.

1099s: What’s Changed, What Hasn’t

If you paid a contractor or freelancer $600 or more in 2025, you’re likely on the hook for sending a 1099-NEC. However, the IRS has announced that it will be increasing that threshold in 2026 to $2,000. This could mean fewer 1099s to file overall, but don’t count on it just yet! Many states have their own requirements that still use the lower threshold.

There are also different filing deadlines depending on the form type and submission method. For example:

• 1099-NEC forms must be issued to recipients and filed with the IRS by February 2, 2026.
  
  
• 1099-MISC forms are due to recipients by January 31, but you have until March 2 (paper) or March 31 (electronic) to file with the IRS.
  
  

And if you’re filing 10 or more information returns (which includes W-2s and any 1099s) the IRS requires that you file electronically.

Estimated Taxes: Dates to Plan Around

Estimated tax payments help you stay in compliance if your income isn’t fully withheld, which is often the case for small business owners and sole proprietors.

Here’s the 2026 schedule:

• April 15, 2026 – First payment (also your annual filing deadline)
  
  
• June 15, 2026 – Second payment
  
  
• September 15, 2026 – Third payment
  
  
• January 15, 2027 – Final payment for the 2026 tax year
  
  

If your income fluctuates seasonally or you expect a shift in earnings next year, now’s the time to adjust those estimates. A proactive tax advisor can help you fine-tune your payment strategy to avoid underpayment penalties, and better manage cash flow.

Other IRS Updates Worth Knowing

Each year, the IRS adjusts various thresholds to account for inflation. For 2026, that includes changes to standard deductions and income tax brackets, which may impact your tax planning strategy.

The IRS is also continuing to expand its electronic filing requirements. Businesses that still file paper forms should expect tighter restrictions and may need to make the switch to digital in 2026.

Additionally, there are updates coming to the formats of certain information returns, something your payroll or accounting software should be tracking. Still, it’s worth checking in to make sure any tools you’re using are ready for the changes.

Wrapping Up: What You Can Do Now

Tax deadlines aren’t changing dramatically this year, but the details around thresholds, electronic filing, and vendor payments are shifting just enough to trip up anyone who’s not paying close attention.

The best way to stay ahead is to treat January like your go-time, not the starting line. That means reviewing your payroll records in December, chasing down any outstanding W-9s, confirming vendor totals, and setting up a meeting with your accountant to walk through what’s new.

Because when tax season hits, the last thing you want is to be scrambling. Let this year be the one where you get ahead.