Although complying before the deadline avoids immediate penalties, waiting until the last day to file your tax return with the IRS can bring a series of complications ranging from errors in the process to costly penalties.

For the 2025 tax season, the key date is April 15. 2026. If you haven't yet filed your paperwork, here's a guide to filing your return correctly, how to qualify for tax credits, and what types of penalties you could receive.

The biggest risk of waiting until the last day to file your taxes

The main problem arises if you fail to file your return on time or if you owe money to the government. In that case, the IRS applies automatic penalties.

The most severe is the failure-to-file penalty, which is usually 5% of the amount owed for each month of delay, up to a maximum of 25%.

In addition to this, there is the penalty for non-payment, which is around 0.5% per month on the outstanding balance. Furthermore, the IRS charges interest on the debt accrued from the first day of delay, which can cause the amount to grow rapidly. Even if you file your return on the last day but don't pay what you owe, you will start accruing late fees from that moment. Last-Minute Technical Problems: Beyond the penalties, waiting until the last minute also involves operational risks. The IRS electronic system often receives a high volume of traffic in the final hours, which can cause slowness or failures in sending information. This can result in returns that are not processed correctly or remain pending without the taxpayer noticing. Another frequent problem is the lack of assistance. Accountants, tax advisors, and help centers are usually overwhelmed in the days leading up to the deadline, making it difficult to resolve doubts or correct errors in time. Filing under pressure increases the likelihood of errors. Among the most common are:

These errors can lead to rejected returns or subsequent audits, further complicating your tax situation. And since it's the last day,making corrections becomes more difficult.

Request an extension instead of filing on the last day

If you see that you won't be able to complete your return before the deadline, there are alternatives. One of the most common is to request an extension using Form 4868, which grants up to six additional months to submit the documentation.

However, it's crucial to understand that this extension only applies to filing, not payment.

If you owe taxes, you'll need to estimate and pay at least a portion to avoid larger penalties. Planning ahead not only avoids stress but also allows you to take advantage of tax benefits and meet your obligations smoothly. You may also be interested in: How to qualify for the Texas Child Tax Credit 2026: Requirements and Amount; 4 Mistakes on Your Tax Return That Delay Your IRS Refund in Texas; Does Not Paying Your Taxes on Time Affect Your Credit Score in Texas?