Updated August 2026.
“Bourbon” has no numeric minimum age. It must be stored in charred new oak (27 CFR 5.143). “Straight bourbon” adds a 2-year floor. Under 4 years, an age statement is required unless the whisky is bottled in bond (27 CFR 5.74 / 5.88). Do not treat 2, 4, or 8 years as a legal minimum for every bourbon. Glass does not add a year after bottling.
Glass is not that clock: does bourbon age in the bottle. Kentucky is tradition, not the age lock: does bourbon have to be made in Kentucky. Whiskey-class sister: does whiskey age in the bottle. Named NAS bottles: Buffalo Trace, Maker’s Mark, Jim Beam.
Class, then the clock
27 CFR 5.143 Table 1 (2) — bourbon whisky: ≥51% corn, distilled at 160° or less, entered into charred new oak at 125° or less, bottled ≥40% ABV. The storage column does not print a year. Table 1 (1) for the whisky class even says “oak barrels with no minimum time requirement.” Straight bourbon (Table 1 (5)) is the row that adds “for a minimum of 2 years.” The 2022 URL collapsed those rows and told readers bourbon “can only be called bourbon if it’s aged for at least two years.” That is the straight type, not the class. Unused as a class lock.
| Class / label | Minimum age | Source |
|---|---|---|
| Bourbon whisky | No numeric minimum; must be stored in charred new oak | 27 CFR 5.143 Table 1 (2) |
| Straight bourbon whisky | ≥2 years in charred new oak | 27 CFR 5.143 Table 1 (5) |
| Age statement on the label | Required if any whisky in the bottle is under 4 years, unless bottled in bond; optional at 4 years and older | 27 CFR 5.74 |
| Bottled in bond | ≥4 years in wooden containers; bottled at 50% ABV (100 proof) | 27 CFR 5.88 |
| NAS (no age statement) | Legal if the whisky is 4 years or older, or if it is bottled in bond | 27 CFR 5.74 / 5.88 |
If an age is stated, it is the youngest whisky in the bottle. Overstatement is prohibited (5.74). Understatement is allowed so long as it does not conflict with a type that requires aging — you may not print “aged 1 year” on a straight bourbon. Bottled-in-bond is a separate labeling term: same distiller, same season, same distillery, at least 4 years in wood, 100 proof. Mention it only as that 4-year / 50% gate. It is not a hidden minimum for every bourbon on the shelf.
What is not a federal floor
The 2022 URL added a “shouldn’t be matured for more than 25 years” federal limit, a “15 years goes bitter” lecture, an opened “halfway point lasts two years” clock, and a 45-year James E. Pepper / Thompson “oldest bourbon” crown. TTB publishes none of those as a class maximum or a consumer month clock. Unused. Over-oaked barrels can go bitter; that is a distillery tasting decision, not a 25-year statute.
Buffalo Trace flagship is NAS 90/45. Maker’s Mark flagship is NAS 90/45. Jim Beam White is 4 years / 40/80. Those are existing 2026 locks on named SKUs — not a 2/4/8 folklore minimum for the class. A bottle can be lawful bourbon younger than 2 years if it is not labeled “straight” and it carries the required age statement (or is bottled in bond). A 4-year NAS bourbon is lawful because 5.74 makes the statement optional at 4 years. An 8-year age statement is marketing and wood time, not a hidden legal floor.
Kentucky does not change the clock. 5.143 is a United States type; see does bourbon have to be made in Kentucky. Once the spirit is in glass, the oak clock has already stoppeddoes bourbon age in the bottle and the whiskey-class sister does whiskey age in the bottle. USDA leftover charts are perishable cooked food, not a sealed fifth. No 2026 MSRP. No #1 oldest ranking.
What we will not print
- No 2-year floor treated as the minimum for all bourbon.
- No 4-year or 8-year folklore minimum for the class.
- No 25-year federal maximum. No 15-year bitterness statute.
- No opened-month clock. No oldest-SKU crown.
- No shop overlay. No 2026 MSRP.
Sources
- 27 CFR 5.143 Table 1 (2) and (5): bourbon (no year) vs straight bourbon (≥2 years), charred new oak, ≥40% ABV.
- 27 CFR 5.74: age = oak time before bottling; under-4-year statement required unless 5.88; youngest whisky if stated.
- 27 CFR 5.88: bottled in bond ≥4 years in wood, 50% ABV.
- Existing 2026 locks: BT 90/45 NAS; Maker’s 90/45 NAS; Beam White 4 years / 40/80.
- Old 2-year-for-all / 25-year-max / 45-year-oldest clocks — unused.