Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Estimated federal excise tax
$17,280
Total proof gallons
6,400
Effective tax per wine gallon
$2.16
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How to use this
- 1Enter wine gallons removed (annual).
- 2Enter proof (e.g. 80 proof = 40% abv).
- 3Enter eligible for small distiller reduced rate.
- 4Read your estimated federal excise tax on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
Federal spirits excise tax is calculated on proof gallons, not wine gallons or bottle count, and a proof gallon is one liquid gallon at 100 proof (50% ABV). This means a gallon of 80-proof vodka is only 0.8 proof gallons for tax purposes, while a gallon of 130-proof cask-strength whiskey is 1.3 proof gallons. This calculator converts your actual production volume and proof into proof gallons and applies the tiered federal rate: $2.70 per proof gallon on the first 100,000 proof gallons removed for small distillers under the Craft Beverage Modernization Act, $13.34 per proof gallon on the next 22.13 million, and $13.50 above that. Get this conversion wrong and you either underpay (triggering penalties) or badly overestimate your tax liability when planning cash flow.
Worked example
Using the values the calculator loads with:
Inputs
- Wine gallons removed (annual): 8000
- Proof (e.g. 80 proof = 40% ABV): 80
- Eligible for small distiller reduced rate: Yes
Results
- Estimated federal excise tax: $17,280
- Total proof gallons: 6,400
- Effective tax per wine gallon: $2.16
What each field means
Inputs
- Wine gallons removed (annual)
- The wine gallons removed (annual) used in the calculation. Starts at 8000 so you have a working example on load.
- Proof (e.g. 80 proof = 40% ABV)
- The proof (e.g. 80 proof = 40% abv) used in the calculation. Starts at 80 so you have a working example on load. Accepted range: 20–190.
- Eligible for small distiller reduced rate
- Pick the option that matches your situation — the maths changes per option. Choices: Yes, No.
Results
- Estimated federal excise tax
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total proof gallons
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Effective tax per wine gallon
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
What exactly is a proof gallon?
One proof gallon equals one liquid gallon of spirits at 100 proof (50% ABV). To convert, multiply your wine gallons (the actual liquid volume) by proof divided by 100. An 80-proof product only counts as 0.8 proof gallons per wine gallon for tax purposes, which is why higher-proof products carry more tax per bottle at the same volume.
Who qualifies as a small distiller for the $2.70 rate?
The reduced rate structure under the Craft Beverage Modernization Act applies to the first 100,000 proof gallons removed by a distiller in a calendar year (subject to controlled group aggregation rules), regardless of total annual production size, though the benefit phases differently for larger overall producers — check current TTB rules for your situation.
Does this include state alcohol tax?
No, this is federal TTB excise tax on distilled spirits only. State spirits excise tax is separate, calculated differently by state (some by proof gallon, some by wine gallon, some ad valorem), and in control states the state effectively sets pricing through markup rather than a simple per-gallon tax.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Distillery Proof Gallon Excise Tax Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/distillery-proof-gallon-tax
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/distillery-proof-gallon-tax" target="_blank" rel="noopener">Distillery Proof Gallon Excise Tax Calculator — RevenueLab</a> (2026).</p>
Source: [Distillery Proof Gallon Excise Tax Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/distillery-proof-gallon-tax) (2026).