October 15 Is Behind Us: What Comes Next for Individuals and Businesses?

The October 15 tax deadline has passed, but that does not mean tax matters should be put aside until next spring. For individuals and businesses, the final months of the year are an important time to address outstanding tax returns, review payments, and evaluate decisions that may affect the 2026 tax bill.

Some taxpayers have already filed their 2025 returns and are ready to move on. Others may still be gathering documents, waiting for missing information, or trying to understand why their tax situation became more complicated than expected.

Both groups have important reasons to act now.

If your 2025 tax return is still unfiled, the priority is to address the filing as soon as possible. If your return has been filed, the focus should shift to year-end tax planning before December 31.

For business owners, this review can be particularly valuable because decisions about compensation, distributions, investments, and business expenses may affect the current tax year.

1. If You Still Haven’t Filed Your 2025 Tax Return

The October 15, 2026, extended deadline has passed for most calendar-year individual federal and California income tax returns. If you did not file, it is important to determine what remains outstanding and move forward rather than waiting for a notice from the IRS or California Franchise Tax Board.

The potential consequences depend on the type of return, whether tax is owed, payments already made, and the reason for the delay. The IRS generally imposes a failure-to-file penalty when a required return is filed late, although exceptions and penalty relief may be available in qualifying circumstances.

What if you cannot afford to pay the tax?

Not having enough money to pay the balance is not a reason to postpone filing indefinitely.

The IRS advises taxpayers who cannot pay the full amount to file their returns and pay what they can. Payment arrangements may be available, depending on the taxpayer’s circumstances. Interest and applicable penalties can continue to accumulate on unpaid amounts.

The important distinction is that filing the return and paying the tax are separate obligations. Leaving a return unfiled can create additional problems beyond the original tax balance.

A review can help determine the estimated liability, identify payments or withholding that have already been credited, and evaluate the available options.

What if you are still missing tax documents?

Missing documents are a common reason returns remain unfinished. A taxpayer may be waiting for investment statements, business records, K-1s, payment-platform reports, or information from a former employer or business partner.

In some cases, information may be available through IRS transcripts or other records. In others, the underlying income and expenses need to be reconstructed and reviewed before the return can be completed accurately.

This is particularly important for individuals with self-employment income, multiple businesses, rental properties, investments, or income from several sources.

If you have not filed because your records are incomplete, a tax professional can help assess what information is missing and how to address the outstanding return.

What if you did not file because you expected a refund?

A late filing does not automatically mean a taxpayer owes a penalty. For federal individual returns, there is generally no failure-to-file penalty when the taxpayer is due a refund. However, filing may still be necessary to claim the refund or refundable credits, and refund claims are subject to time limits.

It is worth confirming the actual result rather than assuming that no action is required.

2. Businesses May Have Different Filing Deadlines

October 15 is not the final filing deadline for every business.

The applicable deadline depends on the entity type, tax jurisdiction, fiscal year, and whether an extension was obtained or applies automatically. Partnerships, S corporations, LLCs, and C corporations can have different federal and California filing schedules.

For example, California generally provides a six-month extension for eligible S corporations and a seven-month extension for eligible C corporations and certain other business entities. An extension provides additional time to file, not additional time to pay the tax due.

For California calendar-year C corporations, the extended filing deadline for 2025 returns is November 16, 2026. That means some businesses still have an upcoming filing deadline even though October 15 has passed.

Business owners should confirm their entity’s actual filing obligations rather than assuming that every tax deadline has passed.

Why an unfiled business return deserves prompt attention

For partnerships and S corporations, late filing can be especially consequential because federal penalties may be calculated based on the number of partners or shareholders and the length of the delay. These penalties can apply even when the entity itself does not pay federal income tax on its business income.

An unfinished business return can also delay the preparation of owners’ personal returns, affect financial reporting, and complicate other business decisions.

If a company has not filed, the next step is to determine which returns are outstanding, whether any tax payments remain due, and what is needed to complete the filings.

3. Year-End Tax Planning: Why Waiting Until January Can Be Costly

For taxpayers who have filed their 2025 returns, the remaining weeks of 2026 provide an opportunity to review their current-year tax position.

Tax planning differs from tax preparation. Tax preparation reports income, deductions, and other items after the year has ended. Tax planning evaluates the available options while there may still be time to make informed decisions.

Some year-end decisions must be completed by December 31, while other tax payments or contributions may have different deadlines. The appropriate timing depends on the particular strategy and the taxpayer’s circumstances.

A year-end review may consider:

• Expected income and tax liability for 2026
• Withholding and estimated tax payments
• Business profitability and owner compensation
• Retirement-plan considerations
• Investment gains and losses
• Major purchases, sales, or changes in business operations
• Significant changes in family or financial circumstances

Not every strategy is appropriate for every taxpayer. The value of planning comes from evaluating the overall situation rather than making isolated decisions based on a general tax tip.

4. What Individuals Should Review Before the End of 2026

Individuals may have experienced significant changes since filing their 2025 returns. A new job, higher income, investment sales, rental activity, business income, or a change in family circumstances can affect the amount of tax owed.

A year-end review can help identify whether the current withholding and estimated payments are reasonably aligned with expected income.

This is particularly relevant for individuals who receive income outside traditional wages, including business owners, independent contractors, consultants, creators, real estate investors, and people with substantial investment income.

Estimated tax requirements may apply when withholding is insufficient or income is received without tax being withheld. The IRS explains that underpayment penalties can apply even when the taxpayer ultimately files a return and pays the remaining balance.

Retirement planning and investment decisions may also deserve attention before the end of the year. However, contribution deadlines and eligibility rules differ by plan and strategy, so it is important to confirm the applicable requirements before acting.

5. What Business Owners Should Review Before Year-End

For business owners, year-end planning should include more than estimating the amount of tax due.

The company’s financial results, legal structure, owner compensation, cash needs, and plans for the next year may all affect the appropriate approach.

Review business performance

Current financial statements can help identify whether the business is performing differently than expected. A company with significantly higher profits than anticipated may need to revisit its tax projections and payment schedule.

A company experiencing lower revenue or cash-flow pressure may need a different approach.

Review owner compensation and distributions

Compensation and distributions can have different tax consequences depending on the entity’s tax classification and the owner’s role.

For example, S corporation shareholder-employees have specific compensation requirements. A business should not make compensation decisions solely on the basis of how much cash the owner wants to withdraw.

These decisions should be reviewed in light of the company’s financial results and applicable tax rules.

Review significant transactions

A planned business sale, asset purchase, equipment acquisition, new location, ownership change, or major contract can affect both current-year taxes and future obligations.

The timing and structure of a transaction may matter, but the best approach depends on the facts. A tax review before a significant transaction can help identify issues while the business still has options.

Review estimated tax payments

Businesses may have federal and state tax payment obligations that continue even when their annual return has already been filed or extended.

For California corporations, December 15, 2026, is an important date for the fourth-quarter estimated-tax payment. The requirements depend on the corporation and its circumstances.

Business owners should confirm which payments are required, how much has already been paid, and whether current projections indicate a potential shortfall.

6. Do Not Confuse a Filing Deadline With a Planning Deadline

A tax return deadline is a compliance requirement. A planning deadline depends on the particular decision being considered.

Some opportunities may no longer be available once the tax year ends. Others may remain available after December 31, but under different rules or deadlines.

That is why a December planning meeting should not be limited to calculating an estimated tax bill. It should also identify which decisions still need to be made, which actions must occur before year-end, and which matters can be addressed in early 2027.

For individuals and businesses with more complicated financial circumstances, that distinction can be especially important.

7. A Practical Approach for the Rest of the Year

As the year moves toward its close, taxpayers can benefit from separating immediate compliance issues from forward-looking planning.

If your 2025 return is still unfiled:

• Confirm which federal and state returns are outstanding.
• Gather the missing tax documents and business records.
• Determine whether taxes remain unpaid.
• Address the late filing and evaluate whether penalty relief or payment arrangements may apply.

If your 2025 return has been filed:

• Review your expected 2026 income and tax liability.
• Check withholding and estimated tax payments.
• Identify significant transactions or financial changes.
• Discuss applicable year-end planning opportunities with your CPA.
• Confirm upcoming payment and filing deadlines.

These are starting points, not a substitute for reviewing the details of an individual or business’s tax situation.

Final Thoughts

The October 15 deadline has passed, but there is still meaningful work to do before the end of 2026.

For taxpayers who have not filed their 2025 returns, acting promptly can help limit further complications and clarify the available options. For those who have already filed, the remaining months of the year provide an opportunity to review income, payments, and financial decisions before the next tax season.

For business owners, the stakes may extend beyond the tax return itself. Entity compliance, owner compensation, cash flow, estimated payments, and significant transactions can all affect the company’s financial position.

The best next step depends on where you stand today: completing an overdue return, resolving an outstanding tax balance, or planning ahead for the current year.

Need Help With an Unfiled Return or Year-End Tax Planning?

Velin & Associates, Inc. works with individuals, business owners, and closely held companies on tax preparation, outstanding tax filings, business compliance, and tax planning.

If your 2025 return remains unfinished or you want to review your 2026 tax position before year-end, a professional review can help clarify your obligations and identify the issues that deserve attention.

For more information about our tax planning and tax compliance services, contact Velin & Associates, Inc. today.

Velin & Associates, Inc.

8159 Santa Monica Blvd STE 198/200
West Hollywood, CA 90046
📞 323-902-1000
📧 dmitriy@losangelescpa.org

This article is for general informational purposes only and does not constitute tax, legal, or financial advice. Filing requirements, penalties, payment obligations, and planning opportunities vary based on individual circumstances, entity type, and applicable federal and state law. Consult a qualified tax professional regarding your specific situation. CPA for YouTubers | CPA for Shopify Store | CPA for Commerce | CPA for Creators | Shopify Store CPA | CPA for Filmmakers | CPA for Amazon Business | Amazon Business CPA | CPA for Dental Practice | Dentist CPA | Dental Business CPA | Online Commerce CPA | CPA for Doctors | CPA for Medical Practice | CPA for High Net Worth Individuals | Tax Services Healthcare | Tax Services for a Business | Tax Services TikTok | Tax Services for Commerce | Tax Services Los Angeles | Bookkeeping and Tax Services | Tax Preparation | Accounting Firm | Tax Services for Doctor | Tax Services for Entertainment | Online CPA | CPA Los Angeles