How Long Is A Keg Good For

A keg is a popular container used to store and serve . Whether you're hosting a party or running a bar, it's important to know how long a keg will stay fresh to ensure that you're serving the best-tasting beer to your guests.

Typically, the freshness of a keg depends on various factors such as the type of beer, the method of dispensing, and the storage conditions. Let's delve into these factors to understand how long a keg stays fresh.

Firstly, let's consider the type of beer. Non-pasteurized beers, also known as craft beers, have a shorter shelf life compared to pasteurized beers. Craft beers are usually unfiltered and contain live , making them more susceptible to spoilage. In general, non-pasteurized beer will retain its freshness for about 45-60 days if stored under proper pressure and temperature. On the other hand, pasteurized draft beers can last for approximately 90-120 days.

Next, let's discuss the method of dispensing. Most kegs are dispensed using CO2, which helps maintain the carbonation and freshness of the beer. When the keg is connected to a CO2 system, it creates a pressurized environment that prevents the beer from oxidizing and going flat. Proper pressure and temperature control are crucial in preserving the beer's taste. If the pressure is too low, the beer may become flat, while excessive pressure can result in over-carbonation. Similarly, fluctuating temperatures can affect the beer's quality. It's essential to keep the keg refrigerated at a consistent temperature to maximize its freshness.

Now, let's focus on storage conditions. A well-sealed keg can remain good for up to three months when stored at room temperature. However, it's important to note that the beer's quality may start to deteriorate after this period, resulting in a flat or stale taste. To maintain the keg's freshness for as long as possible, it's recommended to store it in a cool environment, preferably a refrigerator. The cooler temperature helps slow down the aging process and keeps the beer tasting its best.

To ensure that you're serving fresh beer, always check the expiration date printed on the keg before using it. This date provides an indication of the beer's freshness and allows you to plan accordingly. Additionally, consider the rate at which the beer is consumed. If you have a slow turnover, it's advisable to order smaller kegs more frequently to avoid serving stale beer.

The freshness of a keg depends on factors such as the type of beer, the method of dispensing, and the storage conditions. On average, a keg of beer will retain its flavor for a couple of weeks, but this can vary depending on the aforementioned factors. Storing the keg at a cooler temperature and adhering to proper pressure control will help extend its freshness. Remember to check the expiration date and plan accordingly to ensure that you're serving the best-tasting beer to your guests.

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How Long Are Kegs Good For Once Tapped?

Kegs of beer, once tapped, have a limited shelf life before they begin to lose their freshness and taste. The length of time a keg remains good after being tapped depends on several factors, including the type of beer, the storage conditions, and the method of dispensing.

For non-pasteurized beers that are dispensed with CO2, the general rule of thumb is that they will remain fresh for about 45-60 days. This means that the beer will still taste flavorful and have the desired carbonation during this time frame, as long as the keg is stored properly.

Proper storage conditions include maintaining the keg at the correct temperature and pressure. Ideally, the keg should be stored in a cool environment, away from direct sunlight and excessive heat. The temperature should be kept between 38-45 degrees Fahrenheit (3-7 degrees Celsius) to preserve the quality of the beer. Additionally, the keg should be kept at the appropriate pressure, usually around 10-12 PSI (pounds per square inch), to ensure proper carbonation and prevent oxidation.

On the other hand, pasteurized draft beers have a slightly longer shelf life once tapped. These beers have undergone a pasteurization process, which helps extend their freshness. Pasteurized draft beers can typically remain good for about 90-120 days, provided they are stored correctly.

It's important to note that while the beer may still be safe to consume after these time frames, it may not taste as fresh or have the same level of carbonation. Over time, the flavors can become muted, and the carbonation may dissipate, resulting in a less enjoyable drinking experience.

To summarize, the freshness of a tapped keg depends on various factors, including the type of beer, storage conditions, and dispensing method. Non-pasteurized beers generally stay fresh for 45-60 days, while pasteurized draft beers can last for about 90-120 days. Proper temperature and pressure maintenance are crucial to preserving the quality of the beer.

How Do You Keep A Keg Fresh?

To keep a keg of beer fresh and maintain its flavor for as long as possible, it is crucial to store it properly. Here are some detailed steps to help you achieve that:

1. Temperature control: The ideal storage temperature for a keg of beer is between 36-40°F (2-4°C). It is important to ensure that the keg is not exposed to extreme temperature fluctuations or direct sunlight, as this can negatively impact the flavor.

2. Choose a cool storage location: Find a cool and dark place to store the keg, such as a basement or a refrigerated room. Avoid storing it in areas that are prone to high heat or excessive humidity.

3. Utilize a keg cooler or kegerator: Consider investing in a keg cooler or kegerator, which are specially designed to store and dispense kegs at the optimal temperature. These cooling devices provide a controlled environment for your keg, ensuring the beer stays fresh for a longer duration.

4. Maintain cleanliness: Before tapping the keg, ensure that all equipment, including the tap and lines, are clean and free from any residue or bacteria. Regularly clean and sanitize the tap and lines as per the manufacturer's instructions to prevent any off-flavors from developing.

5. Minimize oxygen exposure: Oxygen can quickly deteriorate the flavor of beer. To minimize oxygen exposure, it is important to properly seal the keg and ensure that the tap is tightly closed when not in use. If using a kegerator, ensure that the door is securely closed.

6. Avoid excessive agitation: Excessive shaking or agitation of the keg can cause the beer to become foamy and lose its freshness. Handle the keg with care to avoid any unnecessary movement or agitation.

7. Monitor the keg's shelf life: Even when stored properly, beer in a keg will have a limited shelf life. It is recommended to consume the beer within a few weeks of tapping the keg to enjoy it at its freshest.

By following these steps, you can significantly extend the freshness of your keg of beer and ensure that its flavor remains intact for a longer period.


The freshness of a keg of beer is influenced by various factors such as the type of beer, whether it is pasteurized or not, and the storage conditions. Non-pasteurized beer on tap should ideally be consumed within 45-60 days, while pasteurized beer can last for 90-120 days. However, it is important to note that these time frames are just guidelines and can vary depending on the specific beer and how it is stored.

To ensure the best quality and taste, it is recommended to store the keg at the proper pressure and temperature. Room temperature storage should not exceed three months, as the beer may start to taste flat or stale. It is also crucial to check the expiration date on the keg before using it.

For optimal flavor retention, it is advised to store the keg at a cooler temperature, not cold. This will help maintain the freshness for a longer period. However, it is important to keep in mind that once a keg is tapped, the clock starts ticking, and the beer should ideally be consumed within a couple of weeks to fully enjoy its flavor.

While a keg of beer can last for a few months, it is best to consume it within a shorter time frame to experience its true taste. Proper storage conditions and checking expiration dates are essential for ensuring the freshness and quality of the beer. So, if you're planning to enjoy a keg, make sure to savor it within a reasonable time to fully appreciate its flavors.

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Thomas Ashford

Thomas Ashford is a highly educated brewer with years of experience in the industry. He has a Bachelor Degree in Chemistry and a Master Degree in Brewing Science. He is also BJCP Certified Beer Judge. Tom has worked hard to become one of the most experienced brewers in the industry. He has experience monitoring brewhouse and cellaring operations, coordinating brewhouse projects, and optimizing brewery operations for maximum efficiency. He is also familiar mixology and an experienced sommelier. Tom is an expert organizer of beer festivals, wine tastings, and brewery tours.