Owner-operator quarterly tax estimator
US self-employed carriers pay income tax plus self-employment tax in quarterly instalments, because no employer withholds on their behalf. This estimates both from your net business profit for the quarter.
Last reviewed · by the fleetchart dispatch desk
Estimated payment
$6,068
An estimate to plan against, not a filing. Confirm with your tax professional.
- Net subject to SE tax
- $22,164
- Social Security (12.4%)
- $2,748
- Medicare (2.9%)
- $643
- Self-employment tax
- $3,391
- Income tax
- $2,677
- Total tax
- $6,068
- Effective rate on profit
- 25.3%
92.35% of net profit
12% of $22,304
How to read this
Self-employment tax follows a stable statutory formula: 15.3% on 92.35% of net earnings, split into 12.4% for Social Security up to an annual wage base and 2.9% for Medicare with no cap. Half of the resulting tax is deductible when computing income tax, which this calculator applies.
The wage base and the income tax brackets change every year. Rather than hard-coding figures that would silently go stale, both are inputs here — check the current wage base with the SSA and use your own marginal bracket.
The estimate is only as good as the expense record behind it. Deductions you incurred but never captured inflate your apparent profit and therefore your payment. This is the practical argument for tracking expenses as they happen rather than reconstructing them in April.
Questions
- When are quarterly estimated taxes due?
- Federal estimated payments are generally due four times a year, in April, June, September and January of the following year. Confirm the exact dates for the current year with the IRS, as they shift when a due date falls on a weekend or holiday.
- What happens if I underpay?
- Underpayment can produce a penalty even when your annual return is filed correctly and on time. That is why the estimate matters as much as the return itself.
- What can an owner-operator deduct?
- Ordinary and necessary business expenses generally including fuel, maintenance, insurance, permits, tolls, and depreciation on the truck, with specific rules for meals away from home. Which of these apply to you depends on your business structure — confirm with a qualified tax professional.
- Is this calculator tax advice?
- No. It applies a published statutory formula to figures you supply, as a planning aid. It does not account for state taxes, credits, entity elections or your full circumstances. Confirm your position with a qualified tax professional.
Terms used here
Stop re-typing these numbers.
A calculator answers the question once. fleetchart reads your rate confirmations and holds your expenses against the loads that caused them, so the answer stays current every week.