Your first paycheck at a new job rarely matches the offer letter exactly. Five things usually account for the gap.
PayslipIQ provides educational information and estimated calculations only. It does not provide tax, legal, financial, accounting, employment, benefits, or payroll advice. PayslipIQ is not a CPA firm, law firm, financial advisor, payroll provider, or tax authority. Always verify your paycheck, deductions, withholdings, and tax position with your employer's payroll department, a qualified CPA, the IRS, your state tax authority, or another appropriately qualified professional. Calculations are estimates; your actual paycheck may differ based on factors specific to your employer, location, benefits elections, and personal tax situation.
Why the first paycheck looks different
Partial pay period. If you started mid-period, your first paycheck covers only the days worked.
Benefits not yet active. Many employers have 30, 60 or 90 day waiting periods. Health, 401(k), HSA may not be deducted from the first paychecks.
Default W-4. If you submitted the W-4 without thinking, withholding may be higher than you would like. Adjust if needed.
Sign-on bonus. Often paid on the first paycheck and withheld at the supplemental rate.
Pay frequency mismatch. Bi-weekly to semi-monthly to monthly all change the per-period math.
What to check
Hourly rate or salary matches the offer letter.
Pay frequency matches what was promised.
Filing status reflects your W-4.
YTD totals start at zero.
Direct deposit account is correct.
State tax is for the right state.
What to do next
Confirm benefits enrollment dates.
Adjust W-4 if withholding is wrong.
Set 401(k) percentage during the enrollment window.
Designate beneficiaries on retirement and life insurance.
Verify direct deposit on the second paycheck.
Frequently asked questions
Why is my first paycheck smaller than expected?
Most likely a partial pay period, benefits not yet active, or default W-4 settings. Compare to the offer letter and pay frequency.
When do my benefits kick in?
Depends on the employer. Common waiting periods are 30, 60 or 90 days. Some employers offer first-day benefits. Check your offer letter or HR portal.
Is my sign-on bonus taxed at a higher rate?
Withheld at the federal supplemental rate (22 percent up to $1M annually, 37 percent above). FICA still applies. Final tax owed is settled at filing time.
Should I change my W-4 right away?
Submit it once with sensible defaults. After one or two paychecks, review using the IRS Tax Withholding Estimator and adjust if needed.