Brewing: fermentation time, tank capacity and duty deferred until the beer leaves

Tank turns, not brewhouse size, define annual capacity

Once wort is made, it sits in fermentation and then in conditioning for a period set by the yeast, the style and the temperature profile. Lager occupies a tank far longer than a rapidly turned ale, so a brewery whose portfolio shifts towards lager quietly loses capacity without changing a single vessel. The practical planning tool is tank turns per year across the fermenting block. Brewers who invest in a bigger brewhouse without adding tanks discover they can brew more and package no more, which is the most common and most expensive mistake in the sector.

Malt, hops and the contracts that protect a recipe

Barley quality varies with the growing season, and maltsters price accordingly; hop varieties are grown in limited regions and popular aroma varieties are frequently contracted years ahead by brewers who cannot risk running out. A recipe built around a scarce variety is a commercial dependency, and substituting mid-year is noticed by drinkers. Water chemistry is adjusted rather than accepted, and yeast is propagated and repitched under strict hygiene because a contaminated yeast stock can compromise every tank it touches. Purchasing in brewing is therefore about securing continuity of character, not simply price per unit.

Duty, bonded stock and the cash timing that follows

Beer typically sits under duty suspension while in an approved warehouse, with excise becoming payable when it is released for consumption. This has practical consequences beyond tax administration: stock movements must be recorded to the satisfaction of the authorities, losses have to be explained, exports leave under different arrangements, and cash leaves the business at release rather than at customer payment. For a growing brewery this creates a working capital squeeze precisely when volume rises. Understanding the release point, and financing it, is part of running the business rather than a matter for the accountant alone.

Kegs and casks are assets that walk out of the door

Serving containers for the on-trade are expensive, durable and prone to disappearing. A brewery selling into pubs is effectively financing a circulating fleet of containers whose return rate determines how many it must own, and each unreturned container is a capital loss disguised as a service issue. Tracking, deposits and disciplined collection routes are the usual answers, along with a shift towards one-way formats for distant or unreliable accounts. Packaging choice also drives investment: canning and bottling lines have their own capital and changeover characteristics that are unrelated to how the beer was brewed.

Routes to market that pull the brewery in different directions

Selling through pubs and bars gives visibility, brand building and higher unit prices, along with credit risk, dispense support and small, frequent deliveries. Selling to retailers gives volume and payment reliability, along with price pressure, listing fees and packaging requirements that demand real equipment. A taproom sells at the highest margin of all but is a hospitality business with its own staffing and licensing burden. Most breweries need a mix, and the classic failure is scaling capacity for one channel while the sales effort is built for another. A sales organisation has to follow that decision, because a team built for pub accounts rarely copes well with a multiple retailer demand planning process.

Frequently asked questions

Why do small breweries struggle to grow beyond their first site?

Usually because the constraints multiply at once. Tank capacity limits volume, packaging becomes the bottleneck as retail demand grows, duty and stock financing consume cash, and the sales model that worked locally does not transfer to a distant region without depot support. Many owners respond by adding fermenters incrementally into a building never designed for it, which raises cost per unit rather than lowering it. Planned expansion needs the brewhouse, tank block, packaging line and distribution reach to move together.

Is contract brewing a legitimate way to supply a beer brand?

Yes, and it is widely used. A brand owner develops recipes and markets the beer while an established brewery with spare tank and packaging capacity produces it. This avoids heavy capital outlay and gives access to better packaging quality than a small site can afford. The trade-offs are minimum batch sizes, limited scheduling flexibility, recipe adaptation to the host brewery's equipment, and the awkwardness of building a brand story around a plant you do not own.

How much does seasonality really affect brewery planning?

Considerably, because beer demand rises with warm weather, holidays and sporting events while tank cycles are fixed. A brewery cannot respond to a heatwave by brewing today for tomorrow, since the beer needs its fermentation and conditioning time. Planning therefore means committing tank space weeks ahead against a forecast, holding finished stock where shelf life allows, and accepting either shortages in the peak or slow stock afterwards. Breweries that manage this well treat the tank plan as their primary commercial document.