Costa Coffee has returned to profit after reshaping its menu around iced drinks and matcha, according to reporting by The Guardian (theguardian.com). The result matters beyond one brand. It gives operators a concrete case for testing whether a permanent shift in beverage mix can offset the labour and energy costs that have compressed margins across the cafe sector.
The evidence is directional rather than definitive. Costa's profit recovery is attributed to menu changes, but the company has not published a full breakdown of how much of the improvement came from cold drinks versus other factors such as pricing, store closures or cost control. Operators should treat the headline as a prompt to build their own model, not as a guarantee that adding iced drinks will repair their P&L.
What the Costa result actually shows
The Guardian's report links Costa's return to profit with iced drinks and matcha on the menu. That is a useful signal because it points to a specific operational lever: beverage mix. Cold drinks typically carry different input costs, preparation times and equipment requirements than hot coffee. Matcha adds a further variable, since it uses a distinct powder, whisking routine and supplier base. For a cafe operator, the relevant question is not whether iced drinks are popular. It is whether the incremental gross profit from cold beverages exceeds the incremental costs of serving them at scale. Those costs include blenders, cold-brew equipment, larger cups, ice production, milk and syrup waste, and additional staff time during peak periods. Costa's result suggests that, in at least one large chain, the answer has been yes. But the company's scale gives it advantages that independent operators and smaller groups do not have. Costa can negotiate supply terms, spread equipment capex across hundreds of sites and test menu changes with more reliable data. A five-site operator cannot assume the same economics.The cold-beverage capex question
Iced drinks are not a zero-cost menu addition. They require counter space, refrigeration, ice machines and often a separate preparation station. In busy sites, the workflow can become a bottleneck: staff may need to move between espresso, blending and finishing stations, which slows service and increases the risk of order errors. The capex decision therefore depends on throughput. A site that sells a high volume of cold drinks can justify dedicated equipment. A site with lower cold-drink penetration may find that shared equipment and simpler recipes produce better returns. Operators should model three scenarios: cold drinks as a marginal add-on, as a significant share of beverage sales, and as the dominant beverage category in summer months. Energy costs are part of this calculation. Ice machines, refrigerators and blenders draw power, and in markets where electricity prices remain elevated, the running cost of cold-beverage equipment can erode the margin advantage. The Guardian's report does not provide energy-cost data for Costa, so operators should use their own utility tariffs and equipment specifications rather than assuming a sector-wide figure.Labour and waste: the hidden variables
Cold drinks can be faster to assemble than some hot beverages, but they are not automatically labour-efficient. Matcha, in particular, requires whisking and careful dosing. If staff are not trained consistently, waste rises and quality varies. That matters because matcha has a distinctive taste profile; a poorly made drink can deter repeat purchase. Waste is a material cost in cold beverages. Milk, fruit purees and syrups have shorter shelf lives once opened. Ice melts. Cups and lids are often more expensive than hot-cup formats. Operators should track waste as a percentage of cold-beverage sales and compare it with hot-beverage waste. If the gap is wide, the menu may need simplification. Labour scheduling is the other variable. Cold-drink demand is often skewed towards afternoons and warmer days. That can create a second peak that does not align with the morning coffee rush. Operators may need to adjust shift patterns rather than simply adding hours. The Costa case does not provide a labour model, so this remains an operator-specific calculation.What operators should model
A practical approach is to build a beverage-mix model with four inputs: average selling price, input cost, labour minutes per drink and equipment cost per site. For each cold-beverage category, operators can then calculate contribution margin per drink and per labour hour. That comparison reveals whether cold drinks are genuinely accretive or merely revenue-generating. The model should also test seasonality. In many markets, iced drink sales peak in summer and fall sharply in winter. A menu built around cold drinks may need complementary hot or warm offerings to maintain throughput in colder months. Matcha can bridge seasons because it works both iced and hot, but that requires staff to be trained on both formats. Finally, operators should separate the decision to trial cold drinks from the decision to invest in dedicated equipment. A trial can use existing blenders and shared refrigeration. Only after the trial shows consistent contribution margin should capex be committed. This staged approach reduces the risk of stranded assets if consumer demand shifts.Commercial impact
For cafe operators, the Costa result supports a targeted rather than wholesale shift towards cold beverages. The commercial opportunity is real: iced drinks and matcha can attract younger customers and increase average transaction value. But the margin benefit depends on execution. Operators that add cold drinks without adjusting workflow, training and waste controls may find that revenue rises while profit does not. Suppliers of syrups, matcha powder, blenders and cold-cup formats are likely to see continued demand. Landlords and franchise operators should note that cold-beverage capability is becoming a baseline expectation in some locations, which may affect fit-out costs and site selection. Investors evaluating cafe chains should ask management for beverage-mix disclosure and cold-beverage contribution margins, not just total sales growth.Risks and unknowns
The main unknown is how much of Costa's profit recovery is attributable to menu mix versus other factors. The Guardian's report does not isolate the effect, and Costa has not published a detailed breakdown. Operators should therefore treat the case as a hypothesis to test locally, not as a proven formula. A second risk is consumer fatigue. Cold-beverage trends can move quickly, and matcha has already attracted premium pricing in some markets. If competition intensifies, prices may fall while input costs remain high. Operators should avoid over-investing in single-ingredient concepts. A third risk is operational complexity. Every new beverage category adds training, storage and quality-control requirements. For smaller operators, the management overhead can outweigh the margin gain. The decision should be based on site-level data, not sector headlines.FY Outlook
Costa's return to profit is a useful signal that beverage mix can move the needle on cafe unit economics. The next step for operators is to run a structured trial: measure cold-beverage contribution margin, labour minutes and waste over a defined period, then decide whether to invest in dedicated equipment. The companies that do this well will be those that treat iced drinks as an operational discipline rather than a menu trend.Sources and References
- The Guardian: Costa's coffee shops return to profit with iced drinks and matcha on the menu (theguardian.com)
- BBC News: Thames Water apologises after £145,000 customer billing mistake (bbc.co.uk)
Why It Matters
Costa's return to profit gives cafe operators a rare, named example of how beverage mix can affect unit economics. It shifts the debate from whether cold drinks are popular to whether they are profitable after accounting for equipment, labour, waste and energy. That distinction matters for capital allocation, menu design and franchise investment decisions across the hospitality sector.The reporting and evidence for this briefing were checked against theguardian.com (theguardian.com) and bbc.co.uk (bbc.co.uk).
