Insight

Financial Modelling for Business Expansion: Lessons from Greggs on Store Profitability in the UK

15 October 2026 · 10 min read · Platform01 Consulting Global

Expanding a retail business requires more than identifying a busy location and expecting sales to follow. Businesses must evaluate rental costs, staffing requirements, customer demand, operating margins and the time required for a new location to become profitable. In the UK, where retailers face changing consumer spending patterns, wage costs, business rates and energy expenses, financial modelling can help management assess whether expansion plans are commercially viable.

Greggs, one of the UK's best-known food-to-go retailers, provides a useful example of how financial modelling can support decisions around new store openings, location selection and long-term profitability. While Greggs' publicly reported performance offers insight into the retail market, the store-level scenarios explored in this article are illustrative and do not represent Greggs' internal financial forecasts or confidential business information.

Understanding Financial Modelling in the UK Retail Market

Financial modelling involves translating business assumptions into a structured financial forecast. A model typically connects revenue, operating expenses, capital expenditure, working capital and cash flow to help decision-makers understand the financial implications of different business scenarios.

For UK retailers, financial modelling can support decisions such as whether to open a new store, expand an existing location, invest in a different format or enter a new market. Rather than relying solely on historical sales or estimated footfall, management can assess how different assumptions influence profitability and investment returns.

For example, a retailer considering a new high-street location would need to estimate expected customer transactions, average spend, product costs, rent, business rates, staffing and utilities. These assumptions would feed into a financial model that estimates the store's potential performance over time.

This is where financial modelling in the UK becomes particularly relevant. A forecast should reflect the commercial conditions of the UK market, including local demand, wage requirements, property costs, inflation and the competitive environment.

Greggs and the Economics of Store Expansion

Greggs operates across a range of locations, including high streets, retail parks, transport hubs and other convenient food-to-go locations. Each setting can have a different commercial profile.

A high-street store may benefit from regular pedestrian traffic and nearby offices, while a transport-hub location may experience concentrated demand during commuting hours. A retail-park location could attract customers throughout the day but may have different rental and accessibility considerations.

Before committing to a new site, Greggs could use a financial model to compare these location types and assess their relative financial attractiveness.

The analysis would consider several important factors:

• Expected sales: Estimated customer transactions and average transaction value, adjusted for the location's footfall, trading hours and customer profile.
• Cost of goods sold: The ingredients, packaging and other direct costs associated with products sold.
• Staffing expenses: Salaries, employer National Insurance contributions, pension costs, holiday cover and recruitment requirements.
• Property costs: Rent, business rates, service charges, deposits and other occupancy expenses.
• Opening investment: Fit-out, equipment, signage, technology and other costs required to establish the store.
• Ongoing operating expenses: Utilities, maintenance, cleaning, waste management and other recurring costs.

Combining these variables allows management to estimate expected store-level operating profit and determine whether the investment aligns with the company's expansion objectives.

How Financial Models Can Evaluate Store Profitability

A useful store-expansion model begins with realistic operating assumptions and connects them to projected financial results.

1. Forecasting Revenue and Customer Demand

Revenue forecasting is one of the most important parts of evaluating a potential store. A model could estimate daily transactions, average customer spend and the number of trading days in a year.

For instance, a proposed location might be assessed under three scenarios: a conservative case with lower customer demand, a base case reflecting the most reasonable assumptions, and an upside case with stronger sales.

Management could then examine how changes in customer volumes, average transaction value and product mix affect revenue. This is particularly important for food-to-go businesses, where location, convenience, commuter patterns and seasonal demand can influence sales.

Greggs could use this type of analysis to compare prospective sites before committing to a lease. It would also help identify the sales level required for a store to cover its fixed and variable costs.

2. Assessing Store-Level Operating Costs

Strong sales do not automatically translate into strong profitability. A location with high revenue may still underperform if its rent, staffing and operating expenses are disproportionately high.

A financial model should therefore separate fixed costs from variable costs wherever practical.

Fixed or relatively fixed costs may include rent, certain service charges and baseline staffing requirements. Variable costs may include ingredients, packaging and some utilities or labour costs that change with trading activity.

For a UK retailer, the model should also account for applicable business rates, employer National Insurance contributions, the National Living Wage and other relevant employment costs. Actual assumptions should reflect the rules, rates and contractual arrangements applicable to the period being forecast.

By modelling these expenses, Greggs could compare the expected profitability of locations with different sales potential and cost structures. This helps management distinguish between a busy site and a commercially attractive site.

3. Calculating Break-Even Sales

Break-even analysis estimates the sales level at which a store's revenue covers its costs, leaving no operating profit or loss under the assumptions used.

A simplified calculation is:

Break-even revenue = Fixed costs ÷ Contribution margin ratio

The contribution margin ratio represents the proportion of revenue remaining after variable costs.

For example, if a hypothetical store has annual fixed costs of £300,000 and a contribution margin ratio of 60%, its estimated annual break-even revenue would be £500,000.

This is an illustrative calculation, not a figure for Greggs. A practical model would need to account for the store's actual cost structure, product mix, operating arrangements and the precise definition of costs included in the calculation.

Break-even analysis can help Greggs assess whether a prospective location has sufficient sales potential to justify its fixed-cost commitment. It can also reveal how sensitive the business case is to a shortfall in customer demand.

4. Evaluating Capital Expenditure and Investment Returns

Opening a new store requires an initial investment. Depending on the location and store format, this may include fit-out costs, equipment, technology, signage and pre-opening expenses.

Financial modelling can compare this upfront expenditure with the cash flows expected from the store over its projected operating life.

Relevant measures may include:

• Payback period: How long it may take for cumulative cash flows to recover the initial investment.
• Net present value (NPV): The present value of forecast cash flows less the initial investment, using an appropriate discount rate.
• Internal rate of return (IRR): The discount rate at which the investment's NPV equals zero.
• Return on invested capital: A measure of the returns generated relative to the capital invested, using a clearly defined methodology.

These measures help management compare investment opportunities, particularly when several potential locations compete for limited capital.

A location with a higher forecast profit may not necessarily represent the best investment if it requires substantially more upfront capital or exposes the business to greater downside risk.

Using Scenario Analysis to Manage Expansion Risk

Financial projections depend on assumptions, and those assumptions may not develop as expected. Scenario analysis helps businesses understand how changes in key variables could affect performance.

For a hypothetical Greggs store, a financial model could compare the following situations:

Base case: Customer demand, average spend and operating costs develop broadly in line with the initial forecast.

Downside case: Customer transactions are lower than expected, staffing costs rise and utilities or occupancy expenses exceed the budget.

Upside case: The location attracts stronger demand, sales volumes increase and operating efficiency improves.

The model could then show the effect of these scenarios on revenue, operating profit, cash flow, break-even timing and investment returns.

Sensitivity analysis can examine individual variables, such as the effect of a 5% reduction in sales or an increase in rent. Scenario analysis, by contrast, can combine several changes to reflect a more complete business situation.

For Greggs, this type of assessment could help management determine whether a proposed site remains financially viable under less favourable conditions. It could also inform decisions about lease terms, staffing plans, investment limits and the pace of expansion.

Comparing Locations Before Committing to a Lease

Location selection is a commercial decision as much as a property decision. Two sites with similar footfall may have very different financial outcomes because of differences in rent, customer behaviour, competition, opening hours and staffing requirements.

A location-level financial model could compare several prospective sites using a consistent set of assumptions.

For example, management could evaluate:

• Expected daily transactions and average transaction value.
• Local competition and the likely share of customer demand.
• Rent, business rates and other occupancy costs.
• Staffing requirements and trading hours.
• Initial fit-out expenditure and ongoing maintenance.
• Forecast profit, cash flow, break-even sales and investment returns.

The results could be presented in a comparative dashboard, allowing decision-makers to identify which locations offer the most attractive balance of expected returns and risk.

This approach is useful not only for established retailers such as Greggs but also for UK restaurant groups, cafés, convenience stores and other businesses considering multi-site expansion.

Connecting Store-Level Forecasts to the Wider Business

A new store does not operate in isolation. Its performance can affect central costs, supply-chain requirements, working capital and the company's overall financial position.

For a retailer expanding across multiple locations, a more comprehensive financial model could connect individual store forecasts to the wider income statement, balance sheet and cash flow statement.

This can help management understand how expansion affects consolidated revenue, operating margins, capital expenditure, inventory requirements and liquidity.

For example, opening several stores within a short period may increase total revenue while placing additional demands on cash reserves. The business may need to fund deposits, equipment, initial inventory, recruitment and operating expenses before the new locations reach their expected trading performance.

A consolidated model helps management assess whether the planned expansion can be funded sustainably and whether the timing of new openings is consistent with available capital.

How Financial Modelling Consultants Can Support UK Businesses

Developing a useful financial model requires more than building spreadsheets. The model must reflect the company's commercial objectives, use defensible assumptions and present the results in a format that supports decision-making.

Businesses may engage financial modelling consultants when they need an independent assessment of expansion plans, investment opportunities, cash flow requirements or financial performance.

For UK companies, experienced advisers can help structure revenue forecasts, evaluate cost drivers, build integrated financial statements and test alternative operating scenarios. They can also help management understand which assumptions have the greatest impact on profitability and investment returns.

Businesses seeking external support may consider financial modelling services when preparing for expansion, reviewing capital allocation or evaluating a new project. Companies operating in London and other major commercial centres may also seek financial modelling consultants in London who understand their sector, operating model and financial requirements.

The appropriate scope of support depends on the complexity of the decision. A single-store feasibility model may require a different level of detail from a multi-site expansion plan or a fully integrated financial forecast.

At Platform01 Consulting, financial modelling can form part of a broader commercial assessment, helping businesses connect financial projections with strategic objectives, investment decisions and growth plans.

Key Takeaways for UK Retailers Planning Expansion

Greggs provides a useful reference point for understanding the financial considerations involved in multi-site retail expansion. Although each location has its own commercial characteristics, the underlying principles apply across the UK retail sector.

Before opening a new store, businesses should assess customer demand, revenue potential, operating costs, capital requirements and downside risks. They should also examine break-even sales, projected cash flows and investment returns rather than relying on revenue growth alone.

Financial modelling brings these factors together in a structured framework. By testing assumptions and comparing scenarios, management can make more informed decisions about where to invest, how quickly to expand and what financial performance a new location needs to achieve.

For businesses evaluating new locations or planning their next stage of growth, a well-structured financial model can provide a clearer view of the opportunities, constraints and financial risks involved.

How Platform01 Consulting Can Help

Platform01 Consulting supports businesses with financial modelling, forecasting and commercial analysis to help inform strategic and investment decisions.

Whether you are evaluating a new location, planning a multi-site expansion or assessing the financial feasibility of a growth initiative, a structured model can help clarify expected costs, potential returns and funding requirements.

Explore our financial modelling services to learn how Platform01 Consulting can support your business planning and financial decision-making.