Tax Extensions Don’t Delay Payments: What You Need to Know After the April 15 Deadline
The April 15 tax deadline has passed — but for many taxpayers, the tax season is far from over.
Each year, millions of individuals and business owners file for an extension, giving them additional time to submit their tax return. However, one of the most common and costly misconceptions we see at Velin & Associates, Inc. is this:
👉 An extension gives you more time to file — NOT more time to pay.
If you filed an extension for your 2025 tax return, your payment was still due on April 15. Missing that payment deadline can result in penalties and interest that continue to grow until the balance is paid in full.
In this article, we’ll break down what this means, how penalties work, and what steps you should take now to minimize the financial impact.
What a Tax Extension Actually Does
Filing an extension (typically using Form 4868) gives you until October 15, 2026 to file your individual tax return.
However, it does not:
- Extend your payment deadline
⠀ - Stop interest from accruing
⠀ - Eliminate penalties for unpaid taxes
Think of it this way:
✔️ Extension = More time for paperwork
⠀
❌ Extension ≠ More time to pay taxes
Why This Matters: Penalties and Interest Add Up Quickly
If you owed taxes as of April 15 and did not pay them, two main costs may apply:
1. Failure-to-Pay Penalty
- Typically 0.5% per month of the unpaid balance
⠀ - Can increase up to 25% of total tax owed
2. Interest Charges
- Interest accrues daily
⠀ - Rate is determined quarterly and compounds over time
Even a relatively small unpaid balance can grow significantly over several months.
Example 1 – Freelancer with Extension
A self-employed individual estimates they owe:
- $18,000 in federal taxes
They file an extension but only pay $5,000 by April 15.
👉 Remaining balance: $13,000
If left unpaid for several months:
- Penalties begin accumulating monthly
- Interest accrues daily
By the time they file in October, the total amount due could increase noticeably — even without additional income.
Step-by-Step: What You Should Do Now
If you filed an extension and still have a balance due, taking action now can significantly reduce penalties.
1. Estimate Your Total Tax Liability
Even if your return isn’t finalized, you should calculate:
- Total expected tax for 2025
⠀ - Payments already made (withholding, estimated taxes, etc.)
2. Pay as Much as Possible Immediately
You don’t have to pay everything at once.
👉 Partial payments still reduce penalties and interest
Example 2 – Business Owner Strategy
A business owner estimates:
- Total tax liability: $40,000
- Paid by April 15: $20,000
Remaining balance: $20,000
Instead of waiting until October, they:
- Pay an additional $10,000 in May
Result:
- Penalties apply only to the remaining $10,000
- Significant savings compared to delaying full payment
3. Consider a Payment Plan
If you cannot pay the full balance:
- The IRS offers installment agreements
- Monthly payments reduce long-term penalties
- Helps avoid more aggressive collection actions
4. Avoid Ignoring the Balance
Ignoring the situation can lead to:
- Increased penalties
- IRS notices
- Potential liens or levies
Taking action early keeps you in control.
Common Situations Where Extensions Lead to Unexpected Balances
At Velin & Associates, Inc., we often see higher balances due for:
Self-Employed & Freelancers
- No withholding throughout the year
- Income fluctuates significantly
High-Income Professionals (Doctors, Dentists, Executives)
- Bonuses or additional income not fully withheld
- Underestimated tax liability
Content Creators & Online Sellers
- Multiple income streams (YouTube, Shopify, Amazon, TikTok)
- Complex deductions and reporting
Investors & Crypto Traders
- Capital gains not accounted for in advance
- Year-end surprises
Example 3 – Medical Professional
- Salary: $250,000
- Bonus: $80,000
- Withholding based only on salary
Result:
- Bonus under-withheld
- Additional tax due at filing: $25,000+
If unpaid by April 15:
- Penalties and interest begin immediately
California Considerations
For taxpayers in California:
- State taxes are also due by April 15
- California imposes its own penalties and interest
- No automatic alignment with federal relief
👉 This means you may owe:
- Federal penalties
- California penalties
- Interest on both balances
Strategic Planning for Next Year
If you found yourself owing more than expected, now is the time to adjust your strategy.
Key Planning Moves:
✔️ Adjust withholding (Form W-4)
⠀
✔️ Make quarterly estimated tax payments
⠀⠀
✔️ Track income more closely throughout the year
⠀
✔️ Work with a CPA for proactive planning
Example 4 – Improved Planning
A content creator owed $30,000 in 2025 due to underpayment.
For 2026, they:
- Set aside 30% of income monthly
- Make quarterly estimated payments
Result:
- No large balance at year-end
- No penalties or surprises
Key Takeaways
- Filing an extension does not delay your tax payment deadline
- Taxes owed were still due on April 15
- Penalties and interest begin immediately on unpaid balances
- Paying early — even partially — reduces total cost
- Proper planning can prevent this situation next year
Final Thoughts
Extensions are a useful tool — but only when used correctly.
They provide flexibility for filing complex returns, but they require accurate tax estimation and timely payment to avoid unnecessary costs.
If you filed an extension and are unsure about your remaining balance, penalties, or next steps, it’s important to act now rather than wait until October. For more information about our tax planning services, contact us today: visit our website.
Velin & Associates, Inc.
8159 Santa Monica Blvd STE 198/200
West Hollywood, CA 90046
📞 323-902-1000
📧 dmitriy@losangelescpa.org
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Our firm provides the information in this e-newsletter for general guidance only, and does not constitute the provision of legal advice, tax advice, accounting services, investment advice, or professional consulting of any kind. The information provided herein should not be used as a substitute for consultation with professional tax, accounting, legal, or other competent advisers. Before making any decision or taking any action, you should consult a professional adviser who has been provided with all pertinent facts relevant to your particular situation. Tax articles in this e-newsletter are not intended to be used, and cannot be used by any taxpayer, for the purpose of avoiding accuracy-related penalties that may be imposed on the taxpayer. The information is provided "as is," with no assurance or guarantee of completeness, accuracy, or timeliness of the information, and without warranty of any kind, express or implied, including but not limited to warranties of performance, merchantability, and fitness for a particular purpose.