State Gig Tax Guide
Colorado Gig Worker Taxes: The Complete Breakdown
If you drive, deliver, or freelance in Colorado, platforms pay you as an independent contractor and withhold nothing. You owe the 15.3% federal self-employment tax and federal income tax — and because Colorado levies a flat state income tax, you also owe state income tax on your net earnings. The flat rate keeps the state piece easy to estimate. Here's how it works.
← Part of the complete Gig Worker Taxes guideHow gig taxes work for Colorado workers
You're an independent contractor — nothing is withheld
Gig platforms pay you as a 1099 contractor, not an employee, so no income or payroll tax comes out of your payouts. You're responsible for setting aside and paying your own taxes.
Federal self-employment tax is 15.3%
That's 12.4% Social Security + 2.9% Medicare on your net earnings — the employer-plus-employee share that a regular job would split with you. It applies in every state, on top of federal income tax.
Federal income tax applies to your net profit
After deductions, your net gig profit is added to your other income and taxed at your federal rate. You can deduct half of your self-employment tax when figuring federal income tax.
Report all income — even without a 1099
You must report every dollar you earn whether or not a platform sends a 1099-NEC or 1099-K. Reporting thresholds for the forms change year to year; your obligation to report does not.
Does Colorado have a state income tax for gig workers?
Yes. Colorado taxes individual income at a single flat rate of roughly 4.4% (the rate can be adjusted, including temporary reductions, so confirm the current figure with the Colorado Department of Revenue). Colorado's flat tax is applied to your federal taxable income with state adjustments, so your net gig profit flows through to the state calculation on top of federal income tax and the 15.3% federal self-employment tax.
Colorado has no separate state self-employment tax — the 15.3% SE tax is federal only — but you still report and pay the flat state income tax on your net earnings. Because the rate is flat rather than progressive, the same percentage applies regardless of how much you earn, which makes estimating the state portion straightforward.
Pay Colorado estimated income tax to the Department of Revenue using Form DR 0104EP, generally on the same quarterly schedule as your federal estimates. This is separate from the federal estimated payments you send the IRS.
Remember: the 15.3% self-employment tax is federal and the same in every state — Colorado's income tax is an additional layer on top.
What Colorado gig workers can deduct
Business mileage
Every mile driven while online or on a job, deducted at the IRS standard mileage rate. Usually the single largest deduction — keep a contemporaneous log.
Phone & data
The business-use percentage of your phone and data plan — you cannot accept jobs without it.
Supplies & equipment
Insulated bags, phone mounts, chargers, and other gear bought specifically for the work.
Tolls & parking
Tolls and parking paid while working are deductible (ordinary commuting tolls are not).
You can deduct the IRS standard mileage rate or your actual vehicle expenses — not both. For most drivers the standard mileage rate is simpler and larger. Keep a contemporaneous mileage log either way.
Quarterly estimated taxes
Because no tax is withheld from your payouts, the IRS expects you to pay as you go through quarterly estimated payments rather than one lump sum in April. If you expect to owe $1,000 or more in federal tax for the year, paying quarterly avoids an underpayment penalty.
Federal estimated payments are generally due around April 15, June 15, September 15, and January 15 of the following year. You file your annual federal return by April 15. Colorado expects its own state estimated payments on a comparable schedule — see the state resources below for the exact form and due dates.
Frequently asked questions
Do Colorado gig workers pay state income tax?
Yes. Colorado has a flat state income tax of roughly 4.4% that applies to your net gig earnings in addition to federal income tax and the 15.3% federal self-employment tax. You pay state estimates using Form DR 0104EP. Confirm the current rate with the Colorado Department of Revenue.
How much should I set aside for taxes in Colorado?
A common rule of thumb is to set aside roughly 25–30% of your net earnings (what's left after mileage and other deductions) to cover the 15.3% self-employment tax, federal income tax, and state income tax. Your exact rate depends on your total household income and your state bracket. Use the Tax Set-Aside calculator for a number tailored to your situation.
What is the Colorado income tax rate for gig workers?
Colorado uses a single flat individual income tax rate of roughly 4.4%, applied to federal taxable income with state adjustments. The rate can be adjusted (including temporary reductions tied to state revenue), so always confirm the current figure with the Colorado Department of Revenue.
How do I pay Colorado estimated taxes as a gig worker?
Use Colorado Form DR 0104EP to pay state estimated income tax to the Department of Revenue, generally four times a year alongside your federal estimates. You can pay online through Colorado's Revenue Online portal. This is separate from your federal estimated payments to the IRS.
What can Colorado gig workers deduct?
The biggest deduction is business mileage at the IRS standard mileage rate for every mile driven while working. You can also deduct the business-use share of your phone, supplies and equipment, tolls, and parking — which lower your federal taxable income, the starting point Colorado's flat tax is built on.
Authoritative resources
Federal (IRS)
- IRS: Self-Employed Individuals Tax Center ↗
- IRS: Self-Employment Tax (Social Security and Medicare) ↗
- IRS: Estimated Taxes ↗
- IRS: Standard Mileage Rates ↗
Colorado state tax agency
Free calculators
Stop guessing what you owe
UnifyOne tracks your gig earnings, mileage, and tax set-aside automatically — so quarterly taxes in Colorado are never a surprise.
This guide is educational information, not tax advice. Federal and state tax rules, brackets, and the IRS standard mileage rate change yearly — confirm current figures with the IRS, the Colorado tax agency, or a qualified tax professional for your situation.