Second Job Withholding Strategy to Avoid Tax Surprises

Each employer may withhold as if its wages are your only income. Combined, your total withholding might be too low, leading to a balance due at tax time.

Fixing this is usually about adjusting Form W-4 using the IRS multi-job worksheet or adding extra withholding, not about guessing per paycheck.

Add expected annual wages from both jobs, include bonuses, and run the IRS Tax Withholding Estimator. Then distribute adjustments to the job where it is easiest to administer.

If you work variable hours, revisit quarterly until your income stabilizes.