Yes, decaf espresso contains a small amount of caffeine. A single shot typically has around 1 to 16 milligrams, compared to about 63 milligrams in a regular espresso shot. The decaffeination process removes roughly 97% of the caffeine from coffee beans, but it never strips out 100%.
How Much Caffeine Is Actually in a Shot
Mayo Clinic lists the caffeine content of a single decaf espresso shot (about 1 ounce or 30 ml) at approximately 1 milligram. That’s a useful baseline, but real-world numbers vary quite a bit depending on where your espresso comes from.
A study published in the Journal of Analytical Toxicology tested multiple decaf espresso shots from a single Starbucks location and found caffeine levels ranging from 3 to 15.8 milligrams per shot. That’s a wide spread, and it means a double shot of decaf from a café could deliver over 30 milligrams of caffeine on a high day. For context, that’s roughly equivalent to a third of a regular espresso shot.
Why the Numbers Vary So Much
Several factors influence how much caffeine survives the decaffeination process. The type of bean matters: Arabica beans naturally contain less caffeine than Robusta beans, so decaf made from Arabica tends to have lower residual caffeine. Most specialty coffee shops use Arabica, but blends and cheaper espresso products sometimes include Robusta, which starts with nearly double the caffeine content before decaffeination even begins.
The specific decaffeination method also plays a role. Some processes use chemical solvents, others use water or carbon dioxide, and each removes caffeine with slightly different efficiency. On top of that, factors like how finely the beans are ground and how long the shot pulls can shift the caffeine extraction for any given cup. This is why a decaf shot from one café can have five times more caffeine than a shot from another.
Decaf Espresso vs. Decaf Drip Coffee
A standard 16-ounce cup of decaf brewed coffee contains roughly 12 to 13 milligrams of caffeine. That’s a much larger drink than a single 1-ounce espresso shot, so ounce for ounce, decaf espresso can actually be more concentrated in caffeine. But because you’re drinking so much less liquid with espresso, the total caffeine per serving is often comparable or even lower.
If you’re ordering a decaf latte or cappuccino at a café, keep in mind those drinks typically use a double shot. Two shots of decaf espresso could put you anywhere from 2 to 30 milligrams of caffeine depending on the shop, the beans, and the day.
Does This Amount of Caffeine Matter
For most people, the caffeine in decaf espresso is negligible. A regular cup of coffee delivers about 95 milligrams, so even on the high end, a decaf shot is a fraction of that. If you’re switching to decaf to cut back on caffeine without eliminating it entirely, a few milligrams per shot is unlikely to cause any noticeable effects.
The exception is people with genuine caffeine sensitivity or medical conditions that require strict caffeine avoidance. Even small amounts of caffeine can trigger anxiety, restlessness, insomnia, or a faster heart rate in sensitive individuals. If you’ve been told to eliminate caffeine completely, it’s worth knowing that decaf isn’t truly caffeine-free. The same applies if you’re drinking several decaf espresso drinks throughout the day, since those small amounts add up.
How Decaf Compares to Regular Espresso
A regular single espresso shot contains about 63 milligrams of caffeine in that same 1-ounce pour. Switching to decaf cuts your intake by at least 75% and often by more than 95%, depending on the specific shot. For people who love the taste and ritual of espresso but want to reduce their caffeine consumption, decaf gets you remarkably close to zero without sacrificing the flavor profile entirely.
A double regular espresso delivers roughly 126 milligrams, which is more caffeine than a standard cup of drip coffee. A double decaf, even on a high-caffeine day, tops out around 30 milligrams. That’s a meaningful difference for anyone managing their intake around sleep, anxiety, or heart health.