How to value a business before you buy
How to work out what a business is really worth before you buy, so you can offer with confidence and avoid overpaying for someone else's optimism.
Overview
The asking price on a listing is a starting point, not a fact. Some sellers price sensibly; others add a premium for the years they have put in, which is understandable but not something you should pay for. Knowing how businesses are actually valued lets you form your own view and negotiate from evidence rather than feel.
This guide covers the three main methods used to value UK SMEs, how to normalise the seller's numbers so you are comparing like with like, and the simple sanity checks that tell you whether a price makes sense for you specifically.
Start with the asking price, then work back
Treat the asking price as the seller's opening position. Your job is to build your own valuation from the numbers, compare the two, and understand the gap. Most UK SME deals complete at 70 to 95 percent of the original asking price, so a sensible offer below the asking figure is normal, not insulting, provided you can explain your reasoning.
The three main methods
Most owner-managed UK businesses are valued by one of three methods.
Multiple of adjusted profit (most common). Take the genuine annual profit, then apply a sector-appropriate multiple, typically 2x to 6x for owner-managed businesses. The multiple rises with growth, recurring revenue, and how well the business runs without the owner.
Multiple of revenue. Used where profit is low by design (a business reinvesting in growth) or where revenue is highly predictable. Common for ecommerce and subscription businesses.
Asset-based. Net asset value plus a goodwill premium. Most relevant for businesses with significant property, machinery, or stock relative to their profit.
Normalise the numbers before you trust them
Sellers present "adjusted" profit by adding back costs a new owner would not carry: an above-market owner salary, personal expenses run through the business, one-off legal or rebrand costs. Some addbacks are fair; others are wishful. Go through each one and ask whether it is genuinely non-recurring and genuinely documented. Reverse any you do not believe. The profit you can defend is the profit you should value.
What raises and lowers what you should pay
Pay more for: a clear growth trend, diversified customers, recurring or contracted revenue, documented systems, staff who will stay, and a business that runs without the current owner. Pay less for: heavy owner-dependence, customer concentration (a handful of clients being most of the revenue), a declining trend, ageing equipment needing replacement, unresolved disputes, and weak record-keeping.
Sanity checks before you commit
Run two simple tests. First, payback: how many years of the business's profit would it take to repay the purchase price? For a small business, four to six years is common; much longer and the price is steep. Second, your own return: after you have paid yourself a fair market salary for running it, does the remaining profit give a sensible return on the cash and effort you are putting in? If buying a job at a loss, the numbers do not work however nice the business.
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Frequently asked questions
- What multiple should I pay?
- It depends entirely on the sector and the quality of the business. For owner-managed UK SMEs, 2x to 4x adjusted profit is common, rising towards 5x to 6x or higher for businesses with strong recurring revenue, real growth, and low owner-dependence. Use the multiple as a negotiation tool: a lower multiple is justified by genuine risks you can point to.
- How do I verify the profits are real?
- Cross-check the accounts against bank statements, VAT returns, and the management figures, and ask your accountant to do formal financial due diligence. Be sceptical of profit that exists only after a long list of addbacks, and of cash businesses where the numbers are hard to substantiate. Verified profit is worth far more than claimed profit.
- Is goodwill worth paying for?
- Sometimes. Goodwill is the premium above the value of the physical assets, reflecting the brand, customer relationships, and reputation. It is worth paying for when those things genuinely transfer to you and will keep generating profit. It is not worth paying for when the goodwill is really the departing owner's personal relationships, which may leave with them.
- What if the asking price is way over the odds?
- You have three options: make a lower offer backed by your own valuation and explain it clearly, ask the seller what justifies their figure (sometimes there is information you are missing), or walk away. Many overpriced businesses sit unsold for months and the seller eventually becomes realistic. Never stretch to a price the numbers cannot support because you have fallen for the business.
Thinking of selling a business instead?
Read our seller guides →Last reviewed 29 May 2026