One of the most common surprises taxpayers face each year is discovering they owe more taxes than expected when filing their return. In many cases, the issue isn’t incorrect filing, it’s outdated withholding or unplanned taxable income throughout the year.
At Wilson Accounting Group, we often see taxpayers caught off guard by changes in income, side jobs, investments, retirement distributions, or other earnings that were never accounted for properly. The good news? A few proactive adjustments now can help you avoid penalties, large balances due, and unnecessary stress at tax time.
Why Your W-4 Matters More Than Ever
Your Form W-4 tells your employer how much federal income tax to withhold from your paycheck. Many people complete this form when they start a job and never revisit it again, but life and income situations change frequently.
You may need to update your W-4 if you have:
- Started a second job
- Received a raise or bonus
- Gotten married or divorced
- Had children or dependents
- Begun receiving retirement income
- Received investment or royalty income
An outdated W-4 can lead to underwithholding, meaning not enough taxes are being taken out throughout the year. Additionally, if your income has changed recently, now is the time to review your withholding before year-end approaches.
Other Sources of Income Can Create Tax Problems
Many taxpayers assume taxes are fully covered through their paycheck withholding…but additional income sources are often not taxed automatically.
Common examples include:
- Interest and dividend income
- Capital gains from investments
- Rental income
- Gig income
- Retirement distributions
- Social Security benefits
- Marketplace insurance premium adjustments
- Bonuses or commission income
Without proper planning, these income sources can increase your taxable income significantly and create an unexpected tax bill. For self-employed individuals or those with substantial non-wage income, quarterly estimated tax payments may be required.
What Are Estimated Tax Payments?
Estimated taxes are periodic payments made directly to the IRS throughout the year to cover taxes on income that doesn’t have withholding.
You may need to make estimated payments if:
- You are self-employed
- You receive investment income
- You earn rental or royalty income
- You have insufficient withholding from wages or retirement income
Failing to make estimated payments can result in:
- IRS underpayment penalties
- Interest charges
- Large year-end balances due
Important: Even if you typically receive a refund, changes in income or deductions can quickly change your tax situation.
Year-End Planning Can Help You Avoid Surprises
The final months of the year are one of the best times to review your financial picture and make adjustments before it’s too late.
At Wilson Accounting Group, we help clients:
- Review and update W-4 withholding
- Calculate estimated tax payment needs
- Analyze multiple income sources
- Project year-end tax liability
- Develop strategies to reduce tax exposure
- Avoid underpayment penalties and large balances due
A simple withholding adjustment today could prevent a stressful tax season later.
Don’t Wait Until Tax Season
Tax planning works best when it happens before year-end…not after. Reviewing your W-4, estimated payments, and additional income sources now can help you stay ahead and maintain better control over your finances.
If you’ve experienced changes in income this year or want to ensure you’re properly prepared, Wilson Accounting Group is here to help. Our experienced tax professionals can review your situation, identify potential issues early, and help you create a plan that keeps you on track through tax season and beyond.
