A second bag beside a Chennai cafe’s grinder can look much like the house coffee. Brown beans, a roast date, a familiar origin. None of those visible details tells the buyer how much caffeine remains.
That answer belongs in the product specification. And when a customer asks whether a decaf latte has no caffeine, the answer needs to survive the move from that specification to the cup.
What decaf means in India’s coffee standard
FSSAI’s beverage standards compendium sets out these limits under section 2.10.2. These are caffeine limits for the coffee product on a dry-weight basis, not for a mug filled with water or milk.
| Coffee format | Maximum caffeine by dry mass | Same limit expressed per gram of dry matter |
|---|---|---|
| Decaffeinated roasted and ground coffee | 0.1% | 1 mg |
| Decaffeinated soluble coffee powder or granules | 0.3% | 3 mg |
Source: Chapter 2.10, Version 4 dated 1 August 2025, pages 5–7, accessed through FSSAI’s current website on 13 September 2026. The compendium is a reference; the original notifications and amendments prevail. These rows cover pure coffee formats. Coffee-chicory mixtures have separate provisions.
The higher soluble-coffee limit does not mean an instant decaf drink necessarily contains more caffeine. The amount of powder used matters. A spoonful of soluble coffee and the ground coffee loaded into an espresso basket are very different quantities.
Also distinguish a maximum from a batch result. A standard tells the manufacturer the ceiling. It does not say every compliant batch sits exactly at that ceiling, or that every laboratory report will show the same number.
This is the same measurement problem that appears in protein claims and serving sizes: the basis printed beside the number changes what the number can answer. The rules for protein are different; the habit of checking the denominator transfers.
Why a powder limit cannot promise a cup value
The unit conversion is straightforward. At 0.1%, one gram of dry coffee contains at most 0.001 g of caffeine, or 1 mg. At 0.3%, the corresponding figure is 3 mg per gram.
Consider two deliberately simplified examples. They are arithmetic examples, not tested products, recommended doses or typical cafe recipes.
- A roasted-coffee dose containing 20 g of dry matter, at the 0.1% ceiling, contains 20 mg of caffeine before brewing.
- A soluble-coffee dose containing 2 g of dry matter, at the 0.3% ceiling, contains 6 mg before it is dissolved.
The first number describes what is in the grounds. It does not demonstrate how much transfers into the beverage. For the second, the powder is dissolved into the drink rather than separated as spent grounds. Neither calculation measures the cup that a particular cafe actually serves.
Real coffee also contains moisture. A scale reading for the beans is not identical to the dry-matter weight used in a laboratory calculation. A buyer should not silently treat those bases as interchangeable when making a precise caffeine claim.
Adding milk or water changes the drink’s concentration and volume. It does not remove caffeine already extracted into it. Doubling the coffee component also changes the starting quantity, even if both versions appear under the same decaf heading on a menu.
For a stated milligram amount per drink, ask how it was established: which coffee batch, what recipe and serving size, and whether the figure came from beverage testing or a calculation. “Decaf” alone cannot supply those details.
The caffeine is removed before roasting
FSSAI describes decaffeination at the green-bean stage, before roasting. The National Coffee Association’s process overview also starts with unroasted beans and describes liquid extraction. Choosing a darker roast at the counter is not the decaffeination process.
Water-based and carbon-dioxide processes are two routes buyers will encounter. In its own process explanation, Swiss Water describes hydrated green beans meeting a green coffee extract, with caffeine moving into the liquid. Carbon filtration removes caffeine from that circulating extract; the beans are dried before they go onward.
That is a description of one producer’s system. It is not proof that every water-processed lot tastes identical, or that an unfamiliar bag has passed through that facility. The processor’s name, the lot documentation and a sensory sample answer different purchasing questions.
There is a dated Indian example too. D’CAF’s 4 June 2026 disclosure reports a batch below 0.1% caffeine by dry weight, using Indian-origin coffee decaffeinated in India through supercritical carbon dioxide processing. The company contrasts this with its earlier, higher-caffeine release.
That is the brand’s account of its batch and supply chain. We have not independently tested the coffee or examined the underlying batch certificate. It supports asking an Indian supplier for current documentation; it does not establish national production capacity, availability in every city or a market-wide switch to decaf.
The process name explains how caffeine is removed. The batch result says what remains in the coffee.
“Chemical-free” is an imprecise shortcut for comparing processes. Ask which process was used and what the product evidence says. There is no need to turn a coffee purchase into a health claim about one method or another.
What a cafe needs beside the second bag
For procurement, a useful record joins the exact coffee format to its supplier, lot and caffeine specification. For service, it joins that bag to the recipe and the words staff use at the counter.
A decaf order can fail before the water touches the coffee if the wrong bag is loaded or regular grounds are used by mistake. Separate identification, a written grinder-change routine and a clear order marker are practical controls to consider. Their purpose is to keep the intended coffee in the intended drink, not to promise a laboratory-verified zero.
Taste still needs an ordinary brew trial. Evaluate the actual coffee with the recipe and equipment used during service. If the discussion turns to water, the guide to cafe coffee water and TDS explains why one meter reading cannot settle hardness, alkalinity and flavour.
A useful decaf buying record
Record roasted beans, ground coffee or soluble powder, plus the exact supplier and lot. Keep coffee-chicory blends out of a pure-coffee comparison.
Ask for the residual caffeine result, units, dry-weight basis and batch reference. A process logo or a removal percentage is not the same record.
Record the dose, recipe and serving size. Keep any per-cup caffeine statement tied to the evidence used to establish it.
Explain that decaf can retain caffeine. Avoid promising zero caffeine or suitability for a customer’s medical condition from the bag alone.
The broader coffee daypart guide helps turn those observations into a test of repeat visits and contribution. A few public requests for decaf are a reason to investigate. They cannot fill in an outlet’s demand forecast or justify a second grinder by themselves.