# Where to Buy Coffee Beans

> Roast date beats brand, price and origin. Where to find beans roasted within weeks, and the cost-per-cup maths that makes it affordable.

Topic: Beans & Origins  
Published: 2026-08-30T10:35:00-04:00  
Updated: 2026-08-30T10:35:00-04:00  
Author: Mical Robert, Editor (https://trysix.online/author/mical-robert)  
Canonical: https://trysix.online/where-to-buy-coffee-beans

## The short answer

From a roaster who prints a roast date rather than just a best-before, in a quantity you will finish in three to four weeks. Local roasters and direct-from-roaster subscriptions are the most reliable. Supermarket bags rarely tell you anything useful.

## Key takeaways

- Roast date is the single most useful thing on a bag. A best-before date tells you almost nothing.
- A one-way degassing valve signals a roaster who expects the coffee to be fresh.
- Good beans cost roughly 30–60p a cup at home — far less than any café.
- Buy 250 g at a time unless you drink a lot. Big bags stale before you finish them.

The single biggest improvement most people can make to their coffee costs about three pounds more per bag and takes no skill at all: buy beans that were roasted recently. The hard part is that most packaging is designed to stop you noticing when they were not.

## The only label that matters much

Coffee bags carry two kinds of date and they are not equivalent. A best-before date, often 12 to 18 months out, is a shelf-life estimate that says nothing about when the coffee was roasted — it could have been roasted last week or ten months ago.

A roast date says exactly when. Coffee is at its best from about three days to four or five weeks after roasting, so a roast date lets you judge what you are buying. Roasters who print one are telling you they expect their coffee to be drunk fresh.

> **The rule** — If there is no roast date, assume the coffee is old. Roasters proud of their freshness print it; nobody hides a good roast date.

**Reading a bag, in order of usefulness.**

| Look for | Tells you | Priority |
| --- | --- | --- |
| Roast date | Actual freshness | First |
| One-way valve | Packaged for fresh coffee | Second |
| Roast level | How it will taste | Third |
| Origin or region | Flavour character | Fourth |
| Processing method | Washed, natural or honey | Fifth |
| Best-before only | Very little | A warning sign |

## Where to buy

**Sources compared on what actually differs between them.**

| Source | Freshness | Price | Choice |
| --- | --- | --- | --- |
| Local roaster | Excellent — often days old | Medium-high | Limited but curated |
| Online direct from roaster | Excellent — roasted to order | Medium-high | Very wide |
| Subscription service | Excellent — regular small bags | Medium-high | Curated for you |
| Speciality grocer | Good — some print roast dates | Medium | Moderate |
| Supermarket | Poor to fair — usually no roast date | Low | Wide but generic |
| Café selling retail bags | Good — usually their own roast | High | Narrow |

The most underrated option is a subscription from a roaster who ships on a schedule. It solves the two problems at once: the coffee is roasted to order, and the bag size is matched to how fast you drink it, so nothing goes stale waiting.

## What good coffee actually costs

The price gap between supermarket and speciality coffee looks large per bag and is small per cup. At a 1:16 ratio, a 250 g bag makes about 16 mugs.

**Figure: Cost per mug at home**

| Item | Value |
| --- | --- |
| Supermarket bag, £4 (Pence per mug) | 35 |
| Mid speciality, £8 (Pence per mug) | 70 |
| Premium single origin, £12 (Pence per mug) | 105 |
| A café flat white (Pence — for comparison) | 380 |

_Based on a 350 ml mug at a 1:16 ratio — about 22 g of coffee. A 250 g bag makes roughly 11 of these._

Even the most expensive bag on that list costs less than a third of a café drink. If you drink coffee at home daily, the upgrade from commodity to speciality coffee is one of the cheapest quality improvements available — considerably cheaper than any equipment purchase, and it makes more difference than most of them.

## How much to buy

### Matching quantity to consumption

1. **Work out your weekly use** — One mug a day at 22 g is about 150 g a week. Two mugs a day is 300 g. A two-cup household drinking two each is over a kilo a month.
2. **Buy three to four weeks' worth** — That is the window in which coffee is at its best. For one mug a day, that is a 500 g bag or two 250 g bags — and two smaller bags keeps the second one sealed longer.
3. **Resist the kilo bag on offer** — Unless you genuinely drink a kilo a month or intend to freeze most of it in portions, the saving is spent on coffee that has gone flat. [How to store coffee beans](https://trysix.online/how-to-store-coffee-beans) covers freezing properly.
4. **Buy whole beans** — Ground coffee flattens within about a week. If you have no grinder, buy smaller bags more often, or have the shop grind it for the specific brewer you own.

## Where to have beans ground

Almost every roaster will grind a bag at the counter, and many supermarkets with a bean section have a grinder beside it. Name the brewer rather than the grind — 'a filter machine', 'a cafetière', 'a Bialetti moka pot' — because fine and coarse mean different things to different people.

Be aware of what it costs you: ground coffee noticeably flattens within about a week. If you grind at home, [how to grind coffee beans](https://trysix.online/how-to-grind-coffee-beans) covers what to buy and the sizes for each method.

> **The one purchase order worth following** — Fresh beans first, then a burr grinder, then a better brewer, then everything else. Most people do this backwards — buying an expensive machine and feeding it stale supermarket coffee ground in a blade grinder. The order above gets more improvement per pound spent at every step.

## What to buy first

If you are starting out, a medium-roast washed coffee from Colombia, Guatemala or Brazil is the most forgiving thing on the shelf: balanced, tolerant of imprecise brewing, and easy to compare against. [The best coffee for beginners](https://trysix.online/best-coffee-for-beginners) has a fuller starting path.

Once you know what you like, origin and processing become worth exploring — [types of coffee beans](https://trysix.online/types-of-coffee-beans) covers single origin against blends, and [where do coffee beans come from](https://trysix.online/where-do-coffee-beans-come-from) covers what each growing region tends to taste like.

## Frequently asked questions

### Where can I buy fresh coffee beans?

From a local roaster, direct from a roaster online, or through a subscription that ships small bags regularly. The test is whether the bag carries a roast date. Supermarket coffee usually carries only a best-before date, which says nothing about when it was roasted.

### How can I tell if coffee beans are fresh?

Look for a printed roast date within the last four weeks. A one-way degassing valve on the bag is a supporting signal. Fresh beans also bloom visibly when hot water hits them — the grounds rise and foam as trapped carbon dioxide escapes.

### Is it cheaper to grind your own coffee?

Whole beans usually cost the same or slightly less than the equivalent pre-ground, so the grinder pays for itself only in quality rather than in money. The real saving is that home-brewed coffee of any kind costs 35p to £1 a mug against several pounds in a café.

### How much coffee should I buy at a time?

Three to four weeks' worth. One mug a day at 22 g is about 150 g a week, so a 500 g bag or two 250 g bags. Larger bags go flat before most households finish them, unless you freeze the surplus in sealed portions.

## Sources

- [Effects of different coffee storage methods on coffee freshness after opening of packages](https://doi.org/10.1016/j.fpsl.2022.100893) — Food Packaging and Shelf Life (2022) (DOI 10.1016/j.fpsl.2022.100893). Supports the freshness window and the effect of storage after opening on coffee quality.
- [How to Brew Coffee](https://www.ncausa.org/About-Coffee/How-to-Brew-Coffee) — National Coffee Association USA. Supports the brewing ratio used for the cost-per-cup calculation and the freshness guidance.
- [Coffee Standards](https://sca.coffee/research/coffee-standards) — Specialty Coffee Association. Supports the coffee-to-water ratio underlying the cost-per-mug figures.

## Related articles

- https://trysix.online/how-to-store-coffee-beans
- https://trysix.online/best-coffee-for-beginners
- https://trysix.online/types-of-coffee-beans
- https://trysix.online/how-to-grind-coffee-beans

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