The Real Problem
Most gig workers who get caught with a big April tax bill didn’t fail to earn enough to cover it. They spent the money before they knew to set it aside. DoorDash, Uber Eats, and Instacart deposit your earnings with nothing withheld. No taxes taken out. The full amount hits your account and sits there looking like money you can use.
Some of it is, but some of it belongs to the IRS.
The system requires you to know the difference and act on it voluntarily. This guide is about building a practical setup that makes that automatic rather than something you remember to think about.
Why “Save 30%” Is Wrong for a Lot of Drivers
The 30 percent rule comes from a rough calculation: self-employment tax (15.3%) plus federal income tax (somewhere in the 10 to 22 percent range) equals a ballpark in the high 20s. Round up to 30 percent and you’ve got a buffer.
For gig workers without significant deductions, that logic holds. For drivers who log meaningful mileage, it overstates what you actually owe by a wide margin.
The IRS standard mileage rate for 2026 is 72.5 cents per mile. Every mile you drive for work becomes a deduction that reduces your net self-employment income before any taxes are calculated. A driver earning $30,000 gross who logs 15,000 work miles gets a deduction of $10,875. That brings taxable self-employment income down to roughly $19,125 before accounting for other deductions.
Running the math from there, self-employment tax on $19,125 (using the 92.35% SE tax base) comes to approximately $2,702. You then deduct half of that SE tax from your adjusted gross income, bringing taxable income to around $17,773. With a standard deduction of roughly $15,000 for a single filer in 2026, taxable income for income tax purposes drops to about $2,773. At 10 percent, that’s $277 in income tax.
Total federal tax amounts to roughly $2,979 on $30,000 gross. That’s 9.9 percent of gross earnings.
The 30 percent rule would have this driver setting aside $9,000. They actually owe roughly $3,000. The other $6,000 is theirs.
This overstates the savings required for a single reason: the mileage deduction is large enough to fundamentally change the math. Drivers who don’t track mileage, or who drive fewer miles relative to their earnings (certain types of gig work, higher-earning hours), will land closer to the generic 25 to 30 percent range. But for a typical delivery driver putting in full-time hours, the effective federal tax rate on gross income is often 12 to 18 percent after deductions, not 25 to 30.
The only way to know your number is to estimate it by tracking your miles from day one.
How to Estimate Your Number
This does not require tax software or an accountant for a rough estimate. The calculation uses three inputs.
The first input is your estimated annual gross income. Add up recent earnings and project forward, or use last year’s 1099 as a baseline.
Next is your estimated annual work miles. If you’re tracking, pull the running total. If you’re not, start now. Most delivery drivers log 1,000 to 2,000 miles per month of full-time work.
The final input includes any other significant deductions, such as the business-use portion of your phone bill, a mileage tracking app subscription, or any equipment purchased for work. These are usually modest compared to mileage but still worth including.
With those three numbers, subtract your mileage deduction (miles times $0.725) and other deductions from gross income. That gives you estimated net self-employment income. Run that through the SE tax calculation from the self-employment tax guide or use an estimator tool. Add an estimate for income tax based on your bracket. Divide the total by your annual gross income.
That ratio is your savings target as a percentage of each deposit.
Doing this once at the start of the year, and updating it at mid-year if your income or mileage tracking changes significantly, is more useful than defaulting to a round number.
The Savings Setup
Knowing your percentage is only half the problem. The other half is not spending the money before a quarterly deadline.
Keep tax savings in a separate account. This means not a separate mental category in your checking account, but a separate account that requires a deliberate action to access. The friction is the point.
A high-yield savings account works well. The money earns something while it sits there, and the slight inconvenience of a transfer keeps it from disappearing into daily spending.
A few gig worker banking apps handle this automatically. Found, for example, automatically sets aside a percentage of each deposit into a tax bucket based on your income. Lili has a similar feature. If the manual transfer feels like too much friction to do consistently, an app that moves the money before you see it removes the behavior entirely. The tradeoff is that these apps have their own fee structures, so it’s worth comparing whether the automation is worth the cost for your situation.
For most drivers, a free high-yield savings account at any standard bank plus a calendar reminder to transfer after each payout works just as well with zero cost.
Variable Income and What to Do With It
The percentage-of-each-deposit approach handles variable income automatically. A slow week produces a smaller transfer, while a strong week produces a larger one. You stay roughly on track without making decisions about how much to save during different periods.
Where it gets harder is a genuinely bad stretch. Several slow weeks in a row, a vehicle issue, or a low-demand period can leave your tax savings account short heading into a quarterly deadline.
When that happens, you have two realistic options.
The first is the safe harbor method: pay 100 percent of last year’s total federal tax liability divided by four. If last year’s total federal tax was $3,600, you owe $900 per quarter regardless of what this year looks like. Pay that amount and you avoid the underpayment penalty entirely, even if you end up owing more at filing. This is the lower-stress option if you had a full year of gig income last year to calculate from.
The second is to estimate this year’s actual liability based on current earnings and mileage, pay that amount, and accept that you may owe a balance in April. As long as you’re above the safe harbor threshold, no penalty applies.
If you’re in your first year of gig work and have no prior year liability to reference, the second approach is the only option. The quarterly estimated taxes guide walks through the calculation in detail.
The One Thing That Changes Everything
Most of the tax savings math above assumes you’re tracking mileage. If you aren’t, two things happen: you overpay taxes (because you’re missing your largest deduction) and you can’t estimate your savings rate accurately (because you don’t know what your net income will be).
Mileage tracking takes 30 seconds to start on any of the major apps. Everlance, Stride, and MileIQ all work, all run in the background, and all export IRS-ready reports at tax time. See the mileage tracking app comparison for a breakdown. If you’re not tracking yet, that’s the first step, before anything else in this guide.
