Work hours & pay
Side hustle hours calculator
Enter the extra money you want each month, what you charge per hour and your free days; see how many hours a week the side gig really needs.
The hours are billable hours. Admin, marketing and travel come on top, so plan some slack.
How the side hustle hours are calculated
The calculator works backwards from the money you want to keep. First it grosses up the goal for tax: amount to bill = goal ÷ (1 − tax share). Then it divides by your hourly rate to get billable hours per month, by the weeks you can work in a month to get hours per week, and by your available days to get hours per day.
Example: you want $1,000 a month after tax, charge $40 an hour and keep 25% aside for tax. You need to bill $1,000 ÷ 0.75 = $1,333.33, which is 33.3 hours a month. Spread over 4 weeks that is 8.3 hours a week, or about 2 hours 47 minutes on each of 3 evenings.
| Hourly rate | $1,000 a month net | $2,000 a month net |
|---|---|---|
| $20 | 16.7 h/week | 33.3 h/week |
| $30 | 11.1 h/week | 22.2 h/week |
| $40 | 8.3 h/week | 16.7 h/week |
| $60 | 5.6 h/week | 11.1 h/week |
| $100 | 3.3 h/week | 6.7 h/week |
The table assumes 25% set aside for tax and 4 working weeks a month. Notice how strongly the rate matters: doubling it halves the time, while doubling the goal doubles it.
Making the number realistic
The result counts only paid hours. Freelancers and gig workers also spend time finding clients, answering messages, invoicing and travelling between jobs, and that unpaid time often adds a quarter to a half on top. If the calculator says 8 hours, block 10 to 12 in your calendar. Use 3.5 or 4 weeks per month rather than 4.3 if you want room for sick days, family events and slow weeks.
Tax is easy to underestimate on side income because nothing is withheld. In the United States, net self-employment earnings of $400 or more must be reported, and they carry self-employment tax of 15.3% for Social Security and Medicare on top of income tax, which is why 25–30% is a common amount to put aside. Other countries have different thresholds, so check your local rules.
If the weekly figure is above 15–20 hours while you hold a full-time job, the plan is fragile: one busy month at work and the goal slips. The usual fixes are a higher rate, a smaller monthly target, or a longer timeline for a one-off goal such as paying off a card.
Frequently asked questions
How many hours a week should a side hustle take?
Many people with a full-time job manage 5 to 15 hours a week over the long term. Above about 20 hours, sleep, health and the main job tend to suffer, so treat that as an upper limit rather than a plan.
How much should I set aside for taxes on side income?
A common rule of thumb is 25–30% of what you earn, because side income usually has no tax withheld. In the US that covers self-employment tax of 15.3% plus income tax for many earners; your own rate depends on your total income.
Should I count unpaid time like marketing and admin?
Yes when you plan your week. The calculator gives billable hours, so add the time spent on finding clients, quotes, invoices and travel, often an extra 25–50%, to see the real commitment.