You should start planning your exit around five years before you’d like to sell because that’s when you still have time to influence value, reduce risk, and create options rather than accepting whatever the market offers you. This “five‑year rule” is especially relevant for UK SME owners, where tax, market conditions, and buyer appetite can move quickly.

Why the five‑year rule matters

Most advisory firms now suggest starting exit planning three to five years ahead of your desired exit date. That window gives you time to improve performance, demonstrate a track record in the numbers, and structure the deal and your personal finances in a tax‑efficient way.

If you leave it until the last 6–18 months, you can still get a deal done, but you’re mainly firefighting: fixing basic compliance issues, scrambling to produce credible accounts, and trying not to give buyers reasons to chip away at the price. Early planners typically achieve stronger valuations and smoother processes than owners who rush at the end.

A phased five‑year timeline

Think of exit planning as a series of overlapping phases, not a single event.

60-48 months: Early thinking and baseline

• Clarify your goals: when you’d ideally exit, how much you need after tax, and what kind of buyer or route (trade sale, MBO, EOT, private equity) might fit.
• Get a baseline valuation and “exit readiness” review so you understand how buyers would see the business today and where the gaps are.

48-36 months: Building value and reducing risk

Professionalise financial reporting: clean, consistent management accounts and year‑end statements, ideally on cloud systems that make due diligence easier.

Reduce owner dependency by developing a management team, documenting processes, and ensuring key relationships don’t live solely in your head or your mobile.

36-24 months: Positioning for buyers

Tidy contracts, intellectual property, HR, and compliance so there are no obvious red flags when lawyers and accountants start digging.

Shape the story: focus on stabilising margins, building recurring or contracted revenue, and demonstrating a clear growth narrative buyers can believe in.

24-12 months: Exit readiness and route selection

• Decide your preferred route (trade sale vs MBO vs EOT, etc.) and sense‑check it against your goals and the current UK market.
• Work with advisers to map out a deal timeline: goals and price expectations, likely buyer types, tax planning, and what must be done before approaching anyone.

12-0 months: Going to market and completing

• Prepare the information memorandum, build a longlist of potential buyers, test the waters, and then move into a more formal sales process: NDAs, meetings, indicative offers, heads of terms.
• Manage due diligence and legals, keep trading performance on track, and execute your communication plan for staff, customers, and suppliers.

The formal sale process itself typically takes 12-24 months from first serious conversations through to completion and handover, so you can see why backing five years out from your “walk‑away date” is so powerful.

A UK scenario: starting at 60 months vs 6

Imagine two UK business owners, both running profitable, owner‑managed service firms turning over around £2.5m with £400k of annual profit.

• Owner A starts exit planning five years before she wants to sell.
• Owner B only starts six months before he’d like to be gone.

Owner A: the five‑year planner

At T‑60 months, Owner A has an indicative valuation of roughly 4x profit, so around £1.6m, but she learns that her business is heavily reliant on her personally and on a handful of key clients. Over the next three to four years she:

• Builds a small leadership team, gradually stepping back from day‑to‑day delivery and client management.
• Diversifies her client base so no single customer accounts for more than 10-15% of revenue.
• Moves to stronger contracts and some recurring‑revenue retainers, making profit more predictable.
• Cleans up the accounts, tightens credit control, and presents three years of consistent, improving results.
• Works with a UK tax adviser to make sure the business and her personal position are structured to take advantage of reliefs that may be available at the time.

By the time she goes to market, the business is less risky and more attractive. Similar UK SMEs that start planning 3-5 years out often achieve stronger valuations and more competitive interest because buyers see a robust team, clean numbers, and a credible growth story. In that environment it’s realistic for her to push the multiple up, say to 5x, turning a £1.6m business into something closer to £2m, and she will probably have more than one buyer at the table.

Owner B: the six‑month sprinter

Owner B waits until he’s exhausted, has had enough of the stress, and decides he “wants out by Christmas”. He calls an adviser six months before his ideal exit date. His numbers look similar on the surface, £400k profit, but:

• The last two years’ accounts are messy, with one‑off items and limited clarity over true underlying profit.
• He is still the key relationship holder for the top three customers, and there is no second‑tier management.
• Contracts are short‑term or informal, and there are gaps in HR and compliance documentation.

A competent adviser can still help, but the focus now is on essentials: cleaning up the minimum financials, fixing glaring compliance issues, and packaging what’s there in a way buyers can analyse. The pool of suitable buyers is smaller, because many trade buyers and funders in the UK prefer businesses where the owner can support a proper handover and where risks are clearly controlled.

As a result, B may only attract a 3x-3.5x multiple on the same £400k profit because buyers see higher risk and more work to stabilise the company post‑completion. That’s a potential £400k-£800k difference in headline value compared with Owner A, before tax, and B is more likely to accept buyer‑friendly terms, such as larger earn‑outs or deferred payments, just to get the deal across the line.

What to do if you’re under five years

If you’re less than five years away from a likely exit, the rule of thumb from UK advisers is still “start now”, even if your initial horizon is only 18-24 months. The minimum lead time for a well‑prepared exit is usually quoted at around 18-24 months, because buyers want to see consistent trends rather than a single good quarter and the legal process itself can be lengthy.

Even with a shorter runway, focusing on a handful of high‑impact areas – clean financials, reduced owner dependency, basic contract and compliance hygiene, and clear tax planning – can still protect value and give you more control over the process. Many owners who accelerate planning in response to changes in UK tax or market conditions still achieve decent outcomes because they tackle these priorities methodically.