Roast Date vs Best Before: what you need to know to get the best from your brew
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Time to read 5 min
If you’ve ever bought a bag of our coffee – or any specialty coffee for that matter, you’ve probably noticed a roast date printed on the bag or on a label (on our bags you can find a roast date on the bottom). But many supermarket coffees show a best before date instead or as well as.
They might seem like two ways of communicating the same thing, but they actually represent very different ideas about coffee, freshness, and how the product is intended to be used. Understanding the difference can help you make better buying decisions and ultimately brew a better cup of coffee at home, so I’m here to explain the differences and nuance of why it matters
First let’s look at roast dates...
You guessed it, a roast date is just the date on which the coffee beans in that bag were roasted. It tells you exactly how fresh the coffee is, and it gives you a useful reference point for when the coffee will taste its best…. Spoiler alert – which is NOT the same day it was roasted…
Coffee beans go through significant chemical changes during roasting. Heat transforms the dense, green seeds (the bean) of the coffee plant into the aromatic brown version we recognise. Hundreds of flavour compounds are created in this process, and oils and sugars develop that contribute to the final taste in the cup.
Once roasting is complete, the road to flavour country opens.
Freshly roasted coffee releases carbon dioxide in a process known as degassing. This happens most rapidly in the first few days after roasting and gradually slows down over time. During this period, the flavours in the coffee also begin to evolve.
For most coffees, the ideal brewing window is anywhere between one and two weeks, (I find 10 days is the sweet spot) although this can vary depending on the roasting system, the roasting profile and of course the brewing method. Espresso, for example, often benefits from a little more rest time, while filter brewing can work well slightly earlier.
This is why we (specialty coffee roasters) print roast dates on our bags: it gives customers transparency about freshness and allows them to brew the coffee when it’s performing at its peak.
Why Freshest Isn’t Exactly Best
One common misconception is that coffee should be used immediately after roasting. In reality, brewing coffee too soon can actually lead to less balanced results.
Because freshly roasted beans contain a high concentration of trapped carbon dioxide, extraction can become uneven. You may notice excessive bubbling during brewing or unstable espresso shots that run too quickly. Allowing the coffee to rest for several days lets some of this gas escape and helps the flavours settle into a more balanced profile.
For this reason, many roasters recommend waiting five to ten days before brewing espresso and slightly less for filter coffee. The roast date makes it possible for customers to judge this timing themselves and experiment. You might feel you get the best from the coffee or day 6 or 7 or 14 from roast date, and it’s fun to brew on each day and note the differences as the coffee opens up and matures.
Think of it a bit like ripening fruit. You know how different bananas taste when they’re too green to when they are going brown, and somewhere in between in perfect – depending how sweet you like your banana.
Now, let’s compare this with “best before”…
What a Best Before Date Means
A best before date in coffee works very differently. Rather than indicating when the coffee was roasted, it tells you how long the coffee is expected to remain its “best”, that being before it starts to fade and lose flavour and quality.
Large-scale commodity coffee producers design their packaging and distribution systems to maximise shelf life. Coffee may be roasted weeks before it reaches the store shelf, and packaging technologies such as nitrogen flushing or vacuum sealing are used to slow down the staling process.
The best before date is therefore based on product stability, not flavour peak. In many cases it is set 6 or 12 months or even longer after roasting.
This approach is common in supermarkets where products must survive long supply chains, warehouse storage, and extended time on shelves. The priority is consistency and durability rather than the freshest possible flavour.
Importantly, coffee that is past its best before date is not necessarily unsafe to drink—it simply may not taste particularly vibrant or aromatic anymore, i.e. not be it’s best as the roaster intended. You can still drink it and it will still taste like coffee, but it will be probably be flat and dull.
DON’T PUT IT IN THE FRIDGE!
Coffee doesn’t spoil in the same way that fresh food does, but it does gradually lose quality.
As roasted beans are exposed to oxygen, light, and moisture, the volatile compounds responsible for aroma begin to fade. The coffee may start to taste flatter, duller, or slightly stale. Oils within the beans can also oxidise, which can introduce bitter or cardboard-like notes.
Putting coffee in the fridge just encourages moisture into the coffee which will, perhaps you think counterintuitively, age it faster. Room temp, dry and sealed is key, as well as keeping it whole bean until you come to brew it (provided you have a grinder at home of course)
Grinding coffee accelerates the aging process dramatically because it increases the surface area exposed to air. That’s why whole beans stored in a sealed bag stay fresher much longer than pre-ground coffee.
Even with good packaging, these changes are inevitable over time. The difference between a coffee brewed two weeks after roasting and one brewed ten months later can be very very noticeable.
Why We Prioritise Roast Date
The use of roast dates is closely tied to the values of the specialty coffee industry. We roasters spend considerable time sourcing high-quality beans, developing roast profiles, and highlighting the unique flavours of different origins.
Freshness plays a major role in preserving those characteristics. By clearly labelling the roast date, roasters give customers the information they need to experience the coffee as intended.
It also reflects a more transparent relationship between producer, roaster, and consumer. Rather than treating coffee as a long-life commodity, specialty coffee presents it as a fresh, seasonal product—much closer to how we think about fresh bread or craft beer.
In Summary..
For everyday coffee drinkers, the practical takeaway is simple: if flavour is your priority, look for coffee with a clearly labelled roast date and try to use it within a few weeks.
Store the beans in a sealed container, away from heat and direct sunlight, and grind them just before brewing whenever possible. We recommend something like an Airscape container which you can buy from us online or in the store.
Best before dates still serve a purpose, especially for products designed to last on supermarket shelves. But if you want to experience coffee at its most aromatic and expressive, the roast date is the detail that really matters.
In the end, both labels communicate useful information—they just answer different questions.
A roast date tells you when the coffee began its journey toward peak flavour, while a best before date tells you how long the product can reasonably remain on the shelf.
Any questions, do get in touch.
The Author: Stevie Mckusker
Stevie is Head of Coffee at EDGE Tea & Coffee, responsible for sourcing and roasting our green beans and ensuring every coffee meets our quality standards before it reaches our shelves.
