Side Hustle Tax Calculator
What your gig work really keeps after self-employment + income tax.
Your numbers
Breakdown
How this calculator works
Gig platforms pay you the gross and withhold exactly zero - every dollar of tax on your side hustle is yours to compute and send. This side hustle tax calculator isolates what the hustle itself costs you: enter your W-2 salary (so the calculator knows your marginal bracket), the hustle's gross income and business expenses, and it splits the bill into self-employment tax (15.3% on 92.35% of net profit) and the extra federal income tax the hustle stacks on top of your salary. The headline number is the "set-aside rate": the percentage of every hustle dollar to move straight to a tax savings account the moment it lands.
Two things surprise most gig workers. First, the marginal bite is bigger than it looks: a $15,000 side hustle on top of a $60,000 salary can face a ~30% effective rate once SE tax and the higher bracket combine - that $15k is really about $10.5k. Second, expenses are pure gold: every deductible dollar (mileage, phone, supplies, home-office) saves you ~30 cents in combined tax, which is why tracking beats earning when it comes to take-home. Use the quarterly estimate output to stay penalty-free, and remember state tax sits on top of these federal numbers.