Part-Time to Annual Salary Calculator

The Formula: Rate × Hours × Weeks

A part-time annual salary is three numbers multiplied together: annual = hourly rate × hours per week × weeks worked. At $20.00 an hour for 25 hours a week across all 52 weeks, that is $26,000 a year gross — 1,300 paid hours.

The third number is where full-time conversions and part-time ones part company. A salaried employee is paid for 52 weeks whether or not they take vacation, so the weeks term is a formality. Part-time work is almost always hourly, and an hourly worker is paid for hours worked: a week off is a week unpaid. If you take three weeks over a year, use 49 rather than 52 and the same wage comes to $24,500.

Note what the formula does not contain: any adjustment for being part-time. The rate is the rate. A $20.00 wage worked 40 hours a week grosses $41,600, or $15,600 more than the 25-hour schedule — not because the hours are worth more, but because there are more of them. What genuinely differs is everything downstream: tax rate, benefits eligibility, and retirement-plan access, all covered below.

Common Part-Time Schedules Converted to Annual

Every row assumes all 52 weeks are worked. The biweekly column is one two-week pay period at that schedule, and take-home is federal income tax and FICA only, for a single filer in a state with no income tax:

The monthly column divides the annual figure by 12, not the weekly wage by four — a month averages 4.33 weeks, so multiplying by four understates monthly pay by about 8%. For the full-time version of any of these rates, see what $20 an hour is a year at 40 hours a week.

How Part-Time Hours Change Your Benefits

The gross figure above is the easy half. The harder half is that the same hourly rate buys a different package depending on how many hours sit behind it, and the thresholds are specific numbers worth knowing before you accept a schedule.

• 30hours a week — health coverage. The Affordable Care Act’s employer mandate defines a full-time employee as one averaging 30 hours a week, or 130 hours a month. An employer with at least 50 full-time-equivalent employees faces a penalty for not offering coverage to those workers. Below the line there is no federal obligation at all, which is why 30 rather than 40 is the number that decides whether health insurance comes with the job.
• 1,000hours a year — the 401(k) door. The long-standing rule lets a plan require a year of service, which means 1,000 hours in a twelve-month period. A 25-hour week clears it at 1,300 hours; a 15-hour week does not. SECURE 2.0 added a second door underneath: employees with 500 or more hours in 2 consecutive years must be allowed to make their own contributions, though the employer still need not match them.
• 35hours a week — the statistical line. The Bureau of Labor Statistics counts anyone under 35 hours as part-time in its household survey. This determines nothing about your job or your benefits; it determines what the word means when you read it in published labor statistics.
• 40hours a week — overtime. The Fair Labor Standards Act owes time-and-a-half beyond 40 hours in a workweek regardless of whether anyone calls you part-time. Hours count per employer, so two 20-hour jobs at unrelated companies yield 40 hours and no premium.

One threshold conspicuously absent from that list is FICA. Social Security and Medicare take 7.65% of gross wages from the first hour worked — there is no part-time exemption, no deduction to shelter it, and the earnings still build toward Social Security credits.

The practical consequence: a 25-hour offer at $20.00 and a 30-hour offer at the same rate are separated by $5,200 of gross pay and, quite possibly, by an entire health plan. If you are negotiating one, negotiate the hours alongside the wage — the guide to asking for a raise applies to a schedule just as well as to a rate.

Why Part-Time Pay Is Taxed at a Lower Effective Rate

Federal income tax is charged only on income above the standard deduction, which is a fixed $16,100 for a single filer in 2026. A fixed shield covers a larger share of a smaller income, so the effective rate on part-time earnings is meaningfully lower than on the same wage worked full-time:

• $20.00 × 25 hours = $26,000. The deduction covers 62% of it, leaving $990 of federal tax and $1,989of FICA — an effective rate of 11.5%.
• $20.00 × 40 hours = $41,600. The same deduction now covers only 39%, and the effective rate climbs to 14.4%.

So the $15,600 of extra gross pay from working 40 hours instead of 25 arrives as $12,585 of extra take-home. Worth having, but not the number on the offer letter.

Push the schedule far enough down and federal income tax disappears entirely. $15.00 an hour for 20 hours a week is $15,600— below the $16,100 deduction, so the federal income tax owed is nothing. The $1,193 of FICA still comes out, which is why the effective rate is exactly 7.65% and not zero. On a 20-hour week, federal income tax only starts once the wage passes $15.48 an hour. State income tax follows its own thresholds; the paycheck calculator models all 50 of them.

What the Annual Number Is Actually For

Converting to an annual figure is rarely an end in itself. It exists so the part-time job can be compared with something: a lender’s income requirement, a full-time offer, a rent budget, or the same job in another city.

Once you have the annual number, hold it up against a benchmark. $26,000 sits well below the typical full-time wage, which is exactly what you would expect from 25hours — the useful comparison is not against a full-time salary but against what counts as a good salary for a household of your size in your metro.

Geography moves that answer more than most people expect. $26,000 goes considerably further in San Antonio than in Seattle. Before comparing two part-time offers in different cities, scale one to the other with the cost of living adjustment method, which works the same on $26,000 as it does on six figures.

Frequently Asked Questions