A Practical Guide to Starting Your Own Microbrewery

Rows of empty amber glass beer bottles for microbreweries, 500ml and 330ml sizes with crown cap necks.

A Practical Guide to Starting Your Own Microbrewery

Starting a microbrewery is one of the most ambitious projects a home brewer can pursue, and one of the most rewarding. The local craft beer scene remains strong, with independent breweries continuing to carve out loyal local followings. If you've been perfecting recipes at home and are wondering what it takes to go commercial, this guide gives you a realistic picture of what's involved.

What Is a Microbrewery?

There is no single legal definition of a microbrewery in the UK. The term generally describes a small-scale brewing operation producing beer commercially, typically below 30,000 hectolitres per year (though most true microbreweries are far smaller, often 1,000 to 5,000 HL or less). What sets a microbrewery apart is independence and craft focus, not output volume.

Step 1: Understand the Licences Required

Running a commercial brewery in the UK requires several approvals. None are optional.

HMRC Registration (Duty)

Beer is subject to alcohol duty in the UK. Before you brew a single litre for sale, you must register with HMRC as a beer producer. Registration is free and done online. HMRC will assign you a brewery approval number and set your duty payment schedule (usually monthly or quarterly).

As of 2024, Small Producer Relief means breweries producing under 4,500 hectolitres per year benefit from reduced duty rates.

Premises Licence (Alcohol Licensing)

If you sell beer directly from your brewery, at a taproom, via an online shop, or at markets, you will need a premises licence from your local council. This is separate from HMRC duty registration.

If you only produce and sell wholesale to other licensed premises (pubs, retailers), you may not need a premises licence for the brewery itself, check with your local licensing authority.

Planning Permission

If you're converting a building or changing its use to a brewery, planning permission may be required. Agricultural conversions, residential-to-commercial changes and premises with increased traffic or noise impact are most likely to need consent. Speak to your local planning authority early.

Environmental Permit (if applicable)

Breweries produce significant waste water (high in organic content). If your discharge volume is above a certain threshold, you may need an environmental permit from the Environment Agency. Smaller operations often discharge under a standard exemption, check the EA's current thresholds.

Business Registration

Register as a sole trader or limited company with Companies House / HMRC as appropriate before trading.

Step 2: Plan Your Brewing System

Pilot and Scale

Most microbreweries start on a 2.5 to 10 barrel system (approx. 350 litres to 1,600 litres per brew). A 5-barrel (800 litre) system is a common starting point, large enough to be economically viable, small enough to manage without a large team.

Before investing in equipment, be confident in your recipes at home brew scale (20 to 50 litres). Scaling up introduces variables (heat distribution, fermentation temperature, water chemistry) that require adjustment.

Core Equipment

Mash tun: Used for converting grain starches into fermentable sugars.
Kettle / copper: Essential for boiling wort and adding hops.
Fermentation vessels: Where the magic happens—turning wort into beer.
Conditioning tanks / bright beer tanks: Used for clarifying and carbonating the final product.
Glycol chiller: Critical for controlling fermentation temperatures precisely.
CIP (Clean-in-Place) system: Ensures the highest standards of sanitation for vessels and pipework.
Packaging line: Used for the final stage of filling kegs, cans, or bottles.

New 5-barrel brewing systems from UK manufacturers typically cost £30,000-£80,000. Second-hand equipment can reduce this significantly.

Water

Brewing water chemistry matters enormously. Most microbreweries invest in water treatment equipment (carbon filtration, reverse osmosis, mineral additions) to brew consistent beer regardless of mains water variation.

Step 3: Develop Your Core Range

Commercially, you need a core range that sells consistently and a rotating seasonal or experimental range that drives interest. A typical starting point for a new craft brewery:

A golden ale or pale ale (most widely accessible, highest volume)
A session IPA (strong craft market demand)
A dark beer (porter, stout or mild, differentiates the range)
1 to 2 seasonal or rotating specials

Test every recipe extensively at home brew scale before committing to a full commercial batch.

Step 4: Decide on Packaging

The packaging format you choose has a major impact on your market and your costs.

Kegs: These offer a lower unit cost and are ideal for on-trade sales, though they require a keg deposit scheme and are not suitable for retail.
Cans: A modern market preference that is very retail-friendly. However, consider the high cost of a canning line (£50,000+) or the need for contract canning.
Bottles: Highly accessible with a premium feel and a lower entry cost, despite having a slightly higher per-unit cost than cans.

Bottling is often the most accessible entry point for a new microbrewery. Glass bottles give a premium presentation, work well for bottle-conditioned (naturally carbonated) beer, and require a smaller initial investment than a canning line.

For bottling, you will need:

A bottle filler (counter-pressure fillers maintain carbonation best)
A capper or corker (depending on closure type)
Labels (printed in-house or by a specialist label printer)
Your bottles

Choosing Glass Bottles for a Microbrewery

For commercial bottle-conditioned beer, use only bottles rated for carbonated beverages. Key specifications:

Pressure rating, standard crown cap beer bottles are rated for carbonated products; standard wine bottles are not
Brown / amber glass, UV protection is essential for hop-forward beers (light causes a skunky off-flavour)
Green glass, used for some lagers and continental-style beers; less UV protection than amber
Crown cap neck (26mm), the standard for UK bottle-conditioned beer

Popular bottle formats for craft microbreweries:

330ml brown glass, the standard craft beer format; six or twelve to a case
500ml brown glass, traditional British ale format; works well for porters, stouts and bitters
750ml cork-and-cage or crown cap, for premium and Belgian-style beers

The Pack Stock supplies glass bottles in brown, green and clear finishes in a range of formats suitable for commercial microbrewery use, with wholesale pricing available.

Browse glass beer bottles at The Pack Stock or contact us for wholesale enquiries.

Step 5: Budgeting and Costs

A realistic minimum budget to set up a small commercial microbrewery (5-barrel system, basic packaging):

Estimated Setup Costs for a Small Commercial Microbrewery (5-barrel system):
Brewing equipment (5-barrel): £30,000–£80,000.
Fermentation vessels (x4): £5,000–£15,000 (if not included in the main kit).
Glycol chiller: £3,000–£8,000.
Premises fit-out: £5,000–£30,000 (highly variable depending on location).
Packaging equipment: £2,000–£15,000.
Licences and registrations: £500–£2,000.
Initial stock (malt, hops, yeast): £2,000–£5,000.
Working capital (first 6 months): £15,000–£40,000.

Total entry cost for a modest but viable setup: £50,000-£150,000+. Funding sources include small business loans, Innovate UK grants, investor partnerships and crowdfunding (BrewDog popularised the Equity for Punks model; many smaller breweries have followed).

A Realistic Timeline

Starting a microbrewery is a marathon, not a sprint. To help you plan your journey, here is a realistic timeframe for each phase of the project:

Business planning and site search: 3–6 months.
Licences and planning permissions (if required): 3–12 months.
Equipment procurement and installation: 2–4 months.
First brew and recipe testing at scale: 1–2 months.
First sales: Generally expected between Month 9 and Month 18 from the start.

Ready to Launch Your Microbrewery?

The transition from enthusiast to professional brewer is an intensive journey, but having the right partners makes all the difference. Beyond the recipes and the permits, the way you present your craft to the world is what builds your brand.

At The Pack Stock, we specialise in supporting independent breweries with high-quality glass beer bottles that meet commercial pressure standards. Whether you are starting with traditional 500ml ambers or premium 750ml cork-and-cage bottles, our wholesale solutions are designed to grow with your business.

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