The Short Answer
When you work a W-2 job, your employer withholds taxes from every paycheck. You never see that money, and at tax time you’re either close to even or owed a small refund.
Gig work doesn’t work that way. DoorDash, Uber Eats, Instacart, and every other 1099 platform sends your earnings with nothing withheld. The IRS expects you to estimate what you’ll owe and pay it in four installments throughout the year. Those are quarterly estimated taxes.
Miss them, and you won’t get a penalty letter mid-year. You’ll just owe extra when you file in April. Most gig workers who get caught off guard by a large April tax bill skipped quarterly payments, either because they didn’t know they were required or because they underestimated their earnings.
Who Needs to Pay Quarterly
The IRS threshold is straightforward: if you expect to owe $1,000 or more in federal income tax for the year from sources without withholding, you’re expected to make quarterly payments.
For gig workers, the relevant test is net self-employment income. Net means after deductions, including mileage, phone, and equipment expenses. The taxes you owe on that net income include both self-employment tax (15.3%) and income tax at your bracket rate.
A rough benchmark: if your gross gig earnings are around $5,000 or more for the year after accounting for deductions, you’re probably above the $1,000 threshold and should be paying quarterly.
If gig work is a side hustle and you have a W-2 job with sufficient withholding, your employer may already be withholding enough to cover both your regular job and your side income. Run the numbers before assuming either way.
The Four Due Dates
The federal quarterly estimated tax calendar does not align neatly with calendar quarters. The periods and deadlines are:
| Period | Covers | Due Date |
|---|---|---|
| Q1 | January 1 through March 31 | April 15 |
| Q2 | April 1 through May 31 | June 15 |
| Q3 | June 1 through August 31 | September 15 |
| Q4 | September 1 through December 31 | January 15 (following year) |
When a deadline falls on a weekend or federal holiday, it shifts to the next business day. These dates apply to federal taxes. Your state may use different deadlines.
Note that Q2 covers only two months (April and May), while Q3 and Q4 cover three months each. This is a quirk of the system, not a calculation error on your part.
How to Calculate What You Owe
There are two IRS-approved methods for calculating quarterly estimated payments. Either one qualifies for the safe harbor, meaning you won’t owe an underpayment penalty as long as you pay on time.
Method 1: Last Year’s Tax Liability (Simpler)
Take the total federal income tax you paid last year (from line 24 of last year’s Form 1040) and divide by four. Pay that amount each quarter.
If your adjusted gross income last year exceeded $150,000 (or $75,000 married filing separately), use 110% of last year’s liability instead of 100%.
This method requires no guesswork about current-year earnings. It’s the easiest approach if your income is roughly consistent from year to year.
Example: You paid $3,600 in federal taxes last year. Divide by four: $900 per quarter. Pay $900 by each of the four due dates and you’ve satisfied the safe harbor requirement.
Method 2: This Year’s Estimated Liability (More Accurate)
Estimate your total income for the current year, subtract deductions, calculate what you’d owe in self-employment tax and income tax, and pay 25% of that total each quarter.
This approach is more accurate if your income has changed significantly from last year. If you started gig work recently or went from part-time to full-time (or vice versa), last year’s tax liability may be a poor proxy for what you’ll actually owe.
The downside is that this requires estimating income you haven’t earned yet. If your estimate is too low, you may still owe when you file (though avoiding the underpayment penalty is the main goal, not zeroing out entirely).
A Practical Approach
Many gig workers use a hybrid: start the year using last year’s liability as the baseline, then adjust mid-year if earnings are running significantly above or below expectations.
The IRS Form 1040-ES includes a worksheet for estimating current-year liability. It’s more detailed than most gig workers need, but it’s there if your situation is complicated.
The Self-Employment Tax Component
Self-employment tax is often the number that surprises first-year gig workers most. It’s 15.3% of your net self-employment income and covers both the employee and employer share of Social Security and Medicare.
For comparison, a W-2 employee pays 7.65% and their employer pays the other 7.65%. As a self-employed worker, you pay both sides.
One offset: you can deduct half of your self-employment tax from your gross income when calculating income tax. This doesn’t reduce the SE tax itself, but it does reduce the income tax you owe on top of it. Tax software applies this automatically.
On $20,000 of net self-employment income, the SE tax calculation looks like this:
- Multiply net income by 92.35% (this is how the IRS defines the SE tax base): $18,470
- Apply 15.3%: approximately $2,826 in SE tax
- Deduct half ($1,413) from gross income for income tax purposes
That $2,826 needs to be factored into your quarterly payment estimates alongside your income tax.
How to Actually Pay
The simplest method is IRS Direct Pay at IRS.gov. It’s free, requires no registration, and lets you schedule a payment directly from your bank account in a few minutes.
Steps:
- Go to IRS Direct Pay
- Select “Estimated tax” as the reason for payment
- Select “1040-ES” as the form
- Enter the tax year and period
- Enter your payment amount and bank account details
- Schedule the payment (you can schedule up to 30 days in advance)
You’ll receive a confirmation number. Save it. That’s your proof of payment if any questions come up later.
Other payment options include the IRS2Go mobile app, EFTPS (Electronic Federal Tax Payment System), and mailing a check with Form 1040-ES. IRS Direct Pay is the most convenient for most people.
State estimated taxes require a separate payment through your state’s revenue department website. Each state has its own payment portal.
What Happens If You Skip or Underpay
Missing quarterly payments won’t trigger a collections notice. The underpayment penalty is calculated silently when you file your return.
The penalty is based on:
- How much you underpaid compared to what was due each quarter
- The number of days the underpayment lasted
- The current IRS underpayment rate (the federal short-term interest rate plus 3 percentage points, adjusted quarterly)
For a typical gig worker who skipped all four quarterly payments and owes $2,000 at filing, the underpayment penalty is often in the range of $50 to $150. It’s not catastrophic, but it’s real money owed for no reason.
Skipping quarterly payments more often means arriving at April 15 with a large bill and no savings set aside to cover it. The penalty is a secondary concern. The cash flow problem is the primary one.
Setting Aside the Right Amount
A simple system: transfer a fixed percentage of every gig payment you receive into a dedicated savings account, and use that account for quarterly payments.
A reasonable starting point for most gig workers:
- 25 to 30% of net earnings if gig work is your primary or only income
- 30 to 35% if you also have W-2 income and your marginal rate is likely higher
“Net earnings” means after mileage and other deductible expenses, not gross platform deposits. If you’re earning $1,000 per week deposited but mileage deductions will reduce your taxable income by roughly 30%, your effective taxable earnings are closer to $700, and 25% of that is $175 per week to set aside.
Tracking your mileage from day one makes this calculation far more accurate. Apps like Everlance, Stride, and MileIQ automate the logging — see our mileage tracking app comparison for a breakdown of each. The mileage deduction is often the single largest line item reducing your quarterly tax obligation. For the full picture on what else you can deduct, see tax deductions for gig workers beyond mileage.
Connecting Quarterly Payments to Your Annual Return
Quarterly estimated taxes are prepayments toward your annual tax liability. When you file in April, the IRS calculates what you owe for the full year and credits all four quarterly payments against that amount.
If your quarterly payments add up to more than you owe, you get a refund. If they add up to less, you owe the difference (plus any underpayment penalty). If you hit the safe harbor, no penalty applies regardless of the balance due at filing.
The annual return itself is covered in more detail in the platform-specific tax guides:
- How to file taxes as a DoorDash driver
- How to file taxes as an Uber Eats driver
- How to file taxes as an Instacart shopper
Quarterly payments and annual filing are two separate tasks, but they’re tied together. Getting quarterly payments right makes the annual filing less stressful and removes the possibility of an unpleasant April surprise.