How to test a startup pricing change before committing

A price increase improves the business only if the money you retain outweighs any lost sales, extra delivery costs and disruption. Start by comparing the current price with a realistic new-price case and a downside case. Check both the contribution left after variable costs and when the cash reaches your bank.

The useful question is whether the change leaves enough money to cover the rest of the business, while keeping customers you can serve profitably.

Choose one customer group and a clear comparison

Define what changes: the price, the package, a discount or payment terms. Separate new customers from existing contracts and renewals. A price that applies to new sales next month may take much longer to reach the rest of your customer base.

Use the price customers actually pay after discounts and credits. Identify costs that change as you sell more, such as transaction fees, usage charges, materials or delivery support. Keep fixed costs separate, including salaries or software commitments that remain even if some customers leave. Invest Northern Ireland’s guidance on fixed and variable costs explains this distinction.

Check what is left after delivery costs

Consider a hypothetical subscription business with 200 paying customers at £100 per month. Assume a variable delivery cost of £20 per customer and monthly fixed operating costs of £14,000. All prices exclude VAT. There are no discounts, refunds or other costs in this simplified example.

• Current position: 200 × £100 = £20,000 revenue. Variable costs are 200 × £20 = £4,000. Contribution is £16,000; after £14,000 fixed costs, £2,000 remains before interest and tax.

• New-price case: £120 with 180 customers gives £21,600 revenue and £3,600 variable costs. Contribution is £18,000; £4,000 remains after fixed costs.

• Downside case: £120 with 150 customers gives £18,000 revenue and £3,000 variable costs. Contribution is £15,000; £1,000 remains after fixed costs.

At the new price, each customer contributes £120 − £20 = £100. You need 160 customers to maintain the original £16,000 contribution, assuming the same delivery cost and fixed costs. That is a useful threshold to test against evidence about conversion and retention. It is not a prediction that 160 customers will stay.

Contribution still has to cover the company’s fixed costs. In this example, 140 customers at the new price cover the £14,000 fixed cost exactly, leaving nothing before interest and tax. ICAEW’s break-even guidance describes the fixed-cost and contribution calculation.

Put payment timing beside the margin calculation

Suppose the current £20,000 revenue is all collected in the same month. In the 180-customer case, assume only 80% of the new £21,600 revenue is collected that month and the rest follows next month. Current-month receipts are £17,280, with £4,320 still due.

If variable and fixed costs are paid that month, outgoings are £3,600 + £14,000 = £17,600. Cash movement is therefore negative £320, even though the simplified operating result is positive £4,000. The current-price case would generate £2,000 cash under the same assumptions about costs. This is an isolated comparison with no opening unpaid invoices, VAT, tax or financing flows.

Build the actual cash forecast using collection dates, renewal dates, supplier terms and applicable tax payments. Include one-off implementation costs. British Business Bank explains why profit and cash flow can differ; higher reported margins do not remove a near-term cash gap.

Test the assumptions before a wider rollout

Where the product and customer agreements allow it, test the change with a defined group or renewal period. Record the starting position and agree what result would justify continuing. Allow enough time for your sales and renewal cycle; a few positive conversations are weaker evidence than paid conversions and retained customers.

• Volume: how many suitable customers buy, renew, downgrade or leave?

• Realised price: do discounts or concessions remove the expected increase?

• Delivery: do usage, onboarding or support costs rise with the new package?

• Cash: are customers paying on the terms assumed?

• Decision: what finding would make you keep, adjust or stop the change?

Avoid changing price, packaging and sales approach together unless you can distinguish their effects. Keep an eye on capacity too: higher sales may require another employee or a larger software contract, making a previously fixed cost increase in steps.

Turn the comparison into a decision

Regular performance reports and cash forecasts help you test and monitor the change. Our Reporting & planning service keeps these connected, with accounting handled by our team. Optional Finance leadership adds experienced fractional CFO support with the choices and their implementation.

If you need a clearer starting point, request a free Founder finance review to see where your current accounting, reporting and forecasts need attention.