Testing Price Elasticity: How a UK Café Found the Sweet Spot at £3.80

What Price Elasticity Actually Means for a Small Business#

Price elasticity is the relationship between a price change and the resulting change in demand. Elastic demand means a small price increase causes a large drop in sales. Inelastic demand means a price increase causes little or no drop. Coffee in a convenience location is relatively inelastic — most customers will pay £0.30 more rather than go without or walk further. Commodity goods sold on Amazon are highly elastic — a £0.50 increase can kill sales entirely. Knowing where your products sit on this spectrum is one of the most valuable pieces of information a pricing decision can draw on. And most SMBs have never tested it.

The Bristol Café: Finding the £3.80 Sweet Spot#

Aisha runs a speciality coffee café in Bristol. Her flat white was priced at £3.20. She suspected she was underpriced — sell-through was consistently high, no queue issues even on the busiest days. She tested three price points over four weeks each: £3.20 (baseline), £3.50, £3.80. Results: at £3.20, she sold 420 flat whites per week. At £3.50, she sold 408 (down 2.9%). At £3.80, she sold 394 (down 6.2%). From baseline, each step up cost her volume but generated more margin. At £3.80, her weekly flat white revenue was £1,497 vs £1,344 at £3.20 — £153 more per week on the same product, same coffee, same service. Annualised: £7,956 from one drink.

How to Run a Price Elasticity Test in Your Business#

You don't need a statistician. You need three things: a baseline period, a test period, and consistent tracking. Step 1: Record current sales volume and revenue for your target product over four weeks. Step 2: Raise price by 10-15%. Maintain for four weeks — do not run any promotions or change anything else during the test. Step 3: Compare volume and margin to your baseline. Step 4: If volume dropped less than the margin gained (e.g., volume down 5% but margin up 12% per unit), the price increase was a net positive. Repeat with a further 10% increase. Step 5: The price sweet spot is where further increases cause volume to drop faster than margin improves.

Why Most SMBs Never Test and What It Costs Them#

The most common reason SMBs don't test price elasticity: they're afraid of the outcome. They'd rather not know that they could charge more, because then they'd feel obligated to act on it. But this avoidance has a real cost. If the average SMB is underpriced by 8% (a conservative estimate based on Xero pricing research) and has £200,000 in annual revenue, that's £16,000 per year being left on the table — not from weak demand, not from a crowded market, but from never asking the question. AskBiz tracks daily sales volume by product, making it straightforward to see the volume response to any price change in near real time.

Interpreting Results: What Good and Bad Elasticity Looks Like#

Inelastic (good for pricing power): a 10% price increase causes less than 5% drop in volume. Your customers value the product or your convenience highly. Push price higher until you find meaningful resistance. Moderate elasticity: a 10% increase causes a 6-10% volume drop. You may still be net positive on margin — calculate carefully. Elastic (price sensitive): a 10% increase causes more than 10% drop in volume. Your customers are shopping on price. Differentiation, bundling, or a different product positioning may be more effective than pushing price.

Multi-Product Elasticity: Not Everything Moves the Same Way#

In Aisha's café, flat whites were inelastic — customers absorbed the increase without meaningful churn. Her packaged retail coffee beans were highly elastic — a 10% price increase dropped sales 22% because customers could easily buy the same beans cheaper online. Knowing this, she raised flat white prices but held bean prices, instead adding a "loyalty bag" subscription that held volume while generating predictable revenue. Different products in your range will have different elasticity. Test your highest-margin and highest-volume SKUs first — that's where the insight is most valuable.

AskBiz: Seeing Volume and Margin Impact Side by Side#

AskBiz records sales volume and margin per SKU every day. When you run a price test, you can compare: average daily units sold at the old price versus the new price, total gross profit at the old price versus the new price, and whether any customer behaviour changed (fewer repeat purchases? Different product mix?). This data sits alongside your Xero COGS figures, so the margin numbers are real — not estimates. Aisha saw within two weeks that her £3.80 test was generating more gross profit despite fewer units. She made the price permanent. The whole exercise took eight weeks and cost nothing except the discipline to track it.

• Price elasticity measures how sensitive your customers are to price changes.
• Testing it systematically — rather than guessing — lets you find the highest price customers will pay without significant sales loss.
• Most SMBs never test; those that do consistently find they're underpriced.