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If you have ever compared your salary to the amount that actually lands in your bank account and wondered where the rest went, the answer is printed on your pay stub. Whether you receive a paper stub or view it in an online payroll portal, it breaks down exactly how your gross pay becomes your net pay. Reading it carefully helps you budget accurately, catch payroll mistakes and make better decisions about your benefits and tax withholding.

Gross pay and the pay period

The top of the stub lists the pay period dates, the pay date and your gross pay. Gross pay is your total earnings before anything is taken out. For salaried employees, it is your annual salary divided by the number of pay periods in the year. For hourly workers, it shows your hours, your rate and any overtime, bonuses or shift differentials. Always check that the hours and rates match your records, because errors here affect every number below it.

Most stubs show two columns for every line: the current period and the year-to-date total. The year-to-date column is surprisingly useful. It lets you track total earnings for loan or rental applications, confirm how much you have contributed to retirement accounts so far and see whether you are on pace to reach annual limits on accounts such as a 401(k) or a health savings account.

Taxes withheld from every check

The tax section lists federal income tax, Social Security and Medicare, often labeled together as FICA, plus state and sometimes local income tax. Social Security is withheld at 6.2 percent of wages up to an annual limit, and Medicare at 1.45 percent with no limit. Federal and state income tax withholding depends on the information you gave on your Form W-4 and your state withholding form. If you consistently owe a large amount at tax time, or receive a very large refund, your withholding probably needs adjusting.

Your pay stub is a monthly snapshot of your entire financial life: what you earn, what you save, what protects you and what you owe in tax.

Pre-tax and after-tax deductions

Deductions are usually split into pre-tax and after-tax categories. Pre-tax deductions, such as traditional 401(k) contributions, health insurance premiums, health savings account contributions and flexible spending accounts, are taken out before income tax is calculated, which lowers your taxable income. After-tax deductions include Roth 401(k) contributions, some disability or supplemental life insurance premiums, union dues and wage garnishments. Knowing which is which helps you understand why a $100 increase in a pre-tax contribution reduces your take-home pay by less than $100.

It is worth reviewing these deductions at least once a year and after any job change or open enrollment period. Make sure your retirement contribution is high enough to receive the full employer match if one is offered, that you are not paying for insurance coverage you no longer need, and that new benefit elections actually took effect. Payroll errors are more common than most people think, and they are much easier to fix when they are caught within a pay period or two.

The extras that are easy to miss

Many pay stubs also include information that does not change your paycheck but still matters. Employer contributions, such as a 401(k) match or an employer deposit into your health savings account, are often listed separately and represent real compensation on top of your salary. Your stub may also show paid time off balances, including vacation and sick hours accrued and used. Checking these numbers helps you plan time away from work, confirm that the match you were promised is actually being paid and value your full compensation when comparing job offers.

At the bottom of the stub is net pay, the amount deposited into your account. That number, not your salary, is the foundation of a realistic budget. If you would like help turning your pay stub into a clear spending, saving and tax plan, the advisors at Finance Clarity Zone in Rochester can review your withholding and benefits with you and show you how small changes can increase both your take-home pay and your long-term savings.