Common Scenarios that Cause an Unexpected Balance Due at Tax Filing

Delivering the news that a client owes a balance at tax time is one of my least favorite parts of this job. No one enjoys surprises when it comes to taxes, especially when they were expecting a refund. Over the years, I’ve noticed a handful of recurring situations that tend to catch people off guard. This is not an exclusive list, however understanding these scenarios can help you plan ahead and avoid an unpleasant surprise next April.

1. Freelancers, 1099 Contractors, and Side‑Business Income:

   
   

   Income earned outside of a traditional W‑2 job usually doesn’t have taxes withheld automatically. Whether you drive for rideshare apps, run a small side business, or receive 1099‑NEC income for freelance work, you’re responsible for both income tax and self‑employment tax. Without quarterly estimated payments or increased W‑2 withholdings from your primary job, this income can easily create a balance due at filing.

   
   

2. Working Multiple Jobs:

   
   

   When you have more than one W‑2 job, each employer withholds taxes as if that job is your only source of income. Combined, your total income may push you into a higher tax bracket, but your withholdings don’t reflect that. This often results in under withholding throughout the year.

   
   

3. Large Bonuses or Irregular Compensation:

Bonuses, commissions, and other irregular payments are often withheld at a flat federal tax rate (22%) that may not match your actual tax bracket. If your income is higher overall, the withholding on that bonus may not be enough to cover the true tax owed. This is especially common when bonuses are paid late in the year, leaving little time to adjust withholdings.

4. One Spouse Earns Significantly More Than the Other

Married couples filing jointly are taxed on their combined income. When one spouse earns substantially more, the higher earner’s income can push the couple into a higher bracket, but the lower earner’s withholding may still be based on their individual income alone. This often leads to under withholding unless adjustments are made.

5. Dependent Status Changes

When a child turns 18, or up to age 24 if they’re finishing college families often lose out on the Credit for Other Dependents. Divorced parents who alternate years claiming a child can also run into issues in years they are not claiming a Child Tax Credit leading to unexpected tax results.

How to Prevent a Balance Due

The good news is that most of these situations are manageable with a little planning. We can review your income, withholdings, and any side business activity to determine whether you should:

• Increase or adjust your W‑2 withholding elections and/or filing status

• Make quarterly estimated tax payments

• Plan ahead for bonuses or other irregular income

  
  

Starting the conversation early gives you more time to plan and helps ensure you’re not caught off guard at tax time.