The short answer: no. Pure peppermint tea, made from peppermint leaves and nothing else, is naturally caffeine-free. If you want a warm cup late in the evening or you are cutting caffeine for a week, plain peppermint is a safe pick on that count.

The longer answer is the reason this question keeps getting asked. A lot of what is sold as "mint tea" is not pure peppermint. Moroccan-style mint tea is usually green tea with mint. Some supermarket "mint" bags are black or green tea with mint flavoring. Some energy blends put mint on top of yerba mate. All of those contain caffeine, and the word "mint" on the front of the box does not tell you which one you are holding.

Below: the answer for peppermint itself, why a cup can still feel like a pick-me-up, which mint drinks do contain caffeine, and the same check across common herbal teas.

Why peppermint has no caffeine

Caffeine in tea comes from one plant: Camellia sinensis. Green, black, white, oolong, and pu-erh are all its leaves, processed in different ways, and all of them contain caffeine. Our guide to caffeine in tea covers how much a typical cup carries and why the tea category is only a starting point.

Peppermint is a different plant. It is Mentha x piperita, a hybrid in the mint family, and it is not a source of caffeine. What it is known for instead is menthol and the other aromatic oils that give it that cool, sharp smell. When you steep dried peppermint you are making a tisane, an herbal infusion, rather than tea in the botanical sense. That puts it in the same group as chamomile and rooibos. Twinings' tea FAQ states it plainly: herbals like peppermint and camomile are naturally caffeine free because they do not come from the tea plant.

So how much caffeine is in a cup of peppermint tea? If the ingredient list says only peppermint leaves, none. This is also why plain peppermint is labeled "naturally caffeine-free" rather than "decaffeinated": there was never any caffeine to remove.

Steeping longer or hotter makes the cup stronger in flavor, but it cannot extract caffeine that is not in the leaf. Adding peppermint to a caffeinated tea does not cancel that tea's caffeine either.

Why it can still feel like a pick-me-up

People who drink peppermint at their desk sometimes say they feel more awake afterward, and then wonder whether the caffeine-free claim is really true. It is. The lift has a different explanation.

Menthol is the classic cooling compound. In a 2002 study in Nature, McKemy and colleagues identified a receptor on sensory nerves that responds both to menthol and to cool temperatures, which is why peppermint tastes cool even in a hot cup.

There is also some research on the smell. In a study of 144 volunteers, people exposed to peppermint essential oil aroma rated themselves more alert and did better on some memory measures than people with no aroma. That study used an essential oil in the room, not a cup of tea, so treat it as a hint about why the smell feels bright rather than proof that tea sharpens your mind. It is part of why peppermint shows up in our list of caffeine-free teas for focus.

Whatever freshness you feel is a taste and smell effect, not a dose of caffeine. If a "mint" drink keeps you buzzing, look at the base, not the mint.

When "mint tea" does contain caffeine

So does mint tea have caffeine? Sometimes. These common mint drinks do.

Moroccan mint tea. Traditionally green tea steeped with fresh mint and sugar. The green tea base brings the caffeine; this is usually the mint tea that "gave someone a buzz."
Mint green tea or peppermint green tea. The bagged version of the same idea. For a rough sense of scale, the FDA lists typical green tea at about 37 mg of caffeine per 12-fluid-ounce drink. A specific blend can be higher or lower depending on how much tea it contains.
Mint black tea and chocolate mint black tea. A black tea base, which the same FDA table puts at about 71 mg per 12 fluid ounces. Chocolate mint blends that include cacao add a little more caffeine plus theobromine, a related, milder compound.
Mint matcha. Matcha is powdered whole leaf, so caffeine depends on how much powder goes in.
Mint yerba mate. Mate is a South American holly rather than Camellia sinensis, but it contains caffeine. Our yerba mate guide explains how it compares with coffee and tea.
Mint blends with guayusa or yaupon. Both are caffeinated relatives of mate that appear in "natural energy" tisanes.

None of these are bad drinks; they are simply not caffeine-free, and the mint is a flavor note. Exact amounts vary by product and serving, so when a number matters to you, use the manufacturer's figure rather than a generic chart.

In a cafe, ask "Is this peppermint infusion, or green tea with mint?" rather than whether it tastes strongly of mint.

How to read the box

You do not need to memorize brand names. Turn the box over, read the ingredient list, and apply one rule: if any of the following appear, the drink contains caffeine.

Green tea, black tea, white tea, oolong, pu-erh, or simply "tea" in the ingredients
Camellia sinensis
Matcha, sencha, gunpowder, or any other named tea style
Yerba mate, guayusa, or yaupon
Guarana, or caffeine listed as an added ingredient
Cacao or cocoa (small amounts of caffeine, plus theobromine)

If the list says only peppermint leaves, or peppermint with other herbs such as chamomile, licorice root, lemon balm, or fennel, the cup is caffeine-free.

Caffeine-free and decaf are different claims. A "naturally caffeine-free" line on the front is a good sign, but the ingredient list is the proof, because "decaffeinated" means something else. Decaf tea started as caffeinated tea and had most of its caffeine removed. The FDA notes that decaffeinated coffees and teas still contain some caffeine, and Twinings describes its decaf teas as containing residual amounts. Our decaf tea explainer covers why the two labels are not interchangeable.

Match the label to your serving. A figure for one bag does not describe a pot made with three bags. If the amount matters and the label does not give it, ask the manufacturer.

Peppermint tea at night

Because pure peppermint has no caffeine, it is a reasonable evening cup, and it is often blended into sleep teas to brighten the flavor of chamomile. It is not a sedative, though, and being caffeine-free does not make it a sleep treatment. If you want an herbal people reach for specifically to wind down, chamomile, lemon balm, and passionflower are the usual picks, and our guide to teas for sleep and relaxation walks through them.

If you sleep badly after a mint drink, check the base first. If it really was pure peppermint, look at the rest of the evening, such as a large drink right before bed.

One caution that has nothing to do with caffeine: peppermint does not agree with everyone's stomach. The US National Center for Complementary and Integrative Health lists heartburn among the possible side effects of peppermint oil taken by mouth. If you notice heartburn or reflux after peppermint tea, especially when you lie down soon after, that is a good reason to switch to a different evening herbal.

Which herbal teas have caffeine: the full check

The same question applies to every tisane, and the answer is almost always the same. Here is the list, with the exceptions at the bottom.

Drink	Plant	Caffeine
Peppermint	Mentha x piperita	None, naturally caffeine-free
Spearmint	Mentha spicata	None
Chamomile	Matricaria chamomilla	None
Rooibos (red or green)	Aspalathus linearis	None
Honeybush	Cyclopia species	None
Hibiscus	Hibiscus sabdariffa	None
Ginger	Zingiber officinale	None
Lemon balm	Melissa officinalis	None
Lemongrass	Cymbopogon species	None
Barley tea (mugicha)	Roasted barley	None
Tulsi (holy basil)	Ocimum tenuiflorum	None
Fruit and berry infusions	Dried fruit, hibiscus, rosehip	None, unless tea is added
Decaf black or green tea	Camellia sinensis, decaffeinated	A small residual amount
Cacao husk or nib "tea"	Theobroma cacao	Some, plus theobromine
Yerba mate	Ilex paraguariensis	Yes
Yaupon	Ilex vomitoria	Yes
Guayusa	Ilex guayusa	Yes
Green tea (for comparison)	Camellia sinensis	About 37 mg per 12 fl oz (FDA)
Black tea (for comparison)	Camellia sinensis	About 71 mg per 12 fl oz (FDA)

The rule of thumb that falls out of this table: herbs, flowers, roots, fruit, and roasted grains are caffeine-free on their own. Anything from the tea plant, the caffeinated hollies, or cacao is not. If a tisane is sold for "energy" and it works, read the ingredients, because one of those plants, or added caffeine, is almost certainly in it.

Our herbal tea brewing guide covers how to brew the caffeine-free group, most of which are far more forgiving than real tea. For two of the most popular, see the chamomile guide and the rooibos guide.

Caffeine-free does not mean right for everyone

NCCIH says peppermint tea, made from the leaves, appears to be safe; research on concentrated peppermint oil does not automatically describe an ordinary cup. For children, during pregnancy, or alongside medicines, check every ingredient in a blend, keep it mild for young children, and ask a pediatrician, pharmacist, or doctor when in doubt. Peppermint essential oil is not a substitute for leaf tea.

Brewing peppermint so it tastes like something

A caffeine-free cup is only worth drinking if it tastes good, and peppermint is brewed badly more often than almost any other herbal. The usual mistake is cooler water, a short steep, and an uncovered cup, which gives the thin, faintly medicinal cup many people remember from hotel rooms.

Peppermint has no caffeine and is far more forgiving than Camellia tea, so treat it generously. Start with the packet's directions, and if you are brewing loose leaf, this is a good baseline:

Water: freshly boiled, around 100°C (212°F).
Leaf: about 1.5 to 2 g of dried leaf per 240 ml (8 oz), roughly a heaped teaspoon, or one good bag. For fresh leaves, use a small handful, lightly crushed.
Time: about 5 to 7 minutes. Taste and adjust next time: less leaf or a shorter steep if it is too intense, more leaf if it is thin.
Cover the cup. Menthol is volatile and escapes with the steam. A lid or a saucer over the mug keeps more of it in the water.

The full method, including peppermint versus spearmint and what the digestion claims actually amount to, is in our complete peppermint guide, and the quick reference lives on the peppermint brewing page.

Frequently asked questions

How much caffeine is in peppermint tea?

None, if it is pure peppermint, which is naturally caffeine-free. A blend that adds green tea, black tea, matcha, or mate does contain caffeine, so check the ingredients.

Does mint tea have caffeine?

Pure peppermint or spearmint infusions have none. Moroccan mint tea, mint green tea, mint black tea, and mint mate contain caffeine from their base.

Is peppermint tea a stimulant?

No. It contains no caffeine. The alert feeling some people notice comes from menthol's cooling sensation and the aroma, not a stimulant.

Is peppermint tea the same as decaf tea?

No. Plain peppermint is naturally caffeine-free. Decaf tea is real tea that had most of its caffeine removed, and the FDA notes decaffeinated teas still contain some caffeine.

Is spearmint tea caffeine-free too?

Yes. Spearmint is a sweeter, softer mint species, also caffeine-free. Moroccan mint tea often uses spearmint, but its caffeine comes from the green tea.

Does a familiar brand's peppermint tea have caffeine?

It depends on the product, not the brand. Pure peppermint is caffeine-free; the same brand's green tea and mint is not. Read the back of the box.

Time it right with Tea Timer

Peppermint asks for boiling water and a long, covered steep, which is the opposite of what most people do out of habit. The Tea Timer app has a preset for peppermint and for the common caffeine-free herbals in the table above, with temperature and time built in, so the evening cup comes out the same every time. It runs on iPhone and Apple Watch, with a Live Activity timer while you do something else.

Download Tea Timer on the App Store

Summary

Pure peppermint tea is naturally caffeine-free. It does not come from the tea plant, and steeping longer cannot add caffeine.
"Mint tea" is not always peppermint. Moroccan mint, mint green tea, mint black tea, and mint mate all contain caffeine from their base.
Read the ingredients, not the front of the box. Tea, Camellia sinensis, matcha, mate, guayusa, yaupon, guarana, and cacao all mean caffeine.
Herbals on their own are caffeine-free, including chamomile, rooibos, hibiscus, ginger, lemon balm, lemongrass, barley tea, and tulsi.
Brew it hot, long, and covered so the menthol stays in the cup.

Does Peppermint or Mint Tea Have Caffeine? The Short Answer and What to Check