You have found a business for sale in London, you like the numbers, and the seller seems genuine. Then the broker mentions an earn-out. Half the buyers I meet tense up at that word. They have heard horror stories about sellers sandbagging or buyers starving a company to avoid paying. The other half see an earn-out as the bridge that finally gets a deal across the river. Both instincts can be right, depending on how you structure it.
I have sat on both sides of the table, buying and selling companies in and around London, and occasionally across the pond in London, Ontario. Earn-outs can save a deal that would otherwise die over a valuation gap. They can also trap you in a two-year tug of war over what counts as profit. If you are buying a business in London and want a pragmatic view, this is the field guide I wish more first-time acquirers had.
What an earn-out actually is
An earn-out is a contingent part of the purchase price, tied to future performance. Instead of paying every pound at completion, you agree to pay an additional amount later if the business hits agreed targets. The logic is simple: you pay full price if the story proves true. If results lag, you pay less.
There are three common shapes:
- Percentage of revenue or gross profit for a defined period. A fixed sum triggered by hitting a target EBITDA, revenue, or customer milestone. A tiered structure with floors and caps, for example, 10 percent of revenue up to 2 million, then 5 percent thereafter, capped at 500,000 total.
In London’s lower mid-market, I often see 20 to 40 percent of the headline price placed into an earn-out, payable over 12 to 36 months. Smaller service firms lean toward revenue based formulas, while product or multi-site businesses prefer EBITDA or store-level contribution where costs matter.
Why London deals lean on earn-outs
Sellers believe their pipeline is robust, their brand is sticky, and Brexit aftershocks have finally normalized. Buyers point to three slow months, a key manager eyeing a move, or a landlord who wants to renegotiate. When you cannot reconcile those views, you split the risk with an earn-out.
The London market is also uneven. A café in Hackney trades on different dynamics than a B2B software reseller in Shoreditch or a logistics company near Heathrow. For some sectors, seasonality or event-driven spikes make trailing twelve months a poor predictor. An earn-out lets both sides live with that uncertainty without stopping the bus.
If you are scanning listings for companies for sale London or working off market business for sale leads through your network, you will often find broker notes like “price includes performance-based consideration.” That is code for an earn-out. Reputable brokers, whether larger national names or smaller outfits you might find under searches like sunset business brokers or liquid sunset business brokers, know that a well-drafted earn-out can push a cautious lender and a proud owner into alignment.
When an earn-out makes sense
- The seller’s personal relationships drive revenue, and the handover is real work. A new contract or location launch sits just over the horizon. The last year shows a swing, up or down, that neither side fully trusts. Key staff need to stay, and the seller’s presence helps them commit. Integration into a group will add capability, but results depend on execution.
If none of these conditions apply, a clean cash deal at a solid multiple is usually the better route.
Choosing the right yardstick
Do not let convenience dictate the metric. Pick the one that tracks the value you are truly buying, and lock the accounting rules in black and white.
Revenue sounds simple, and for many small service firms in London it works. Take a boutique marketing agency with 2.2 million in annual billings and a steady 25 percent gross margin. If the seller will help transition six anchor clients over 12 months, a one year earn-out equal to 8 percent of recognized revenue is straightforward. Fewer arguments, faster monthly calculations, and the seller can influence success without gaming the margin line.
EBITDA matters when costs drive value, like a multi-site gym, a manufacturing job shop in Park Royal, or a specialty food wholesaler. The problem is definition drift. Agree the treatment of owner compensation, rent adjustments, related party expenses, bad debt policy, capitalization thresholds, and recruitment costs. Decide how to handle group charges if you tuck in the company. Set a normalized working capital level so the seller cannot pump profit by starving inventory or delaying hires.
Gross profit splits the difference in agencies, VARs, and e-commerce where pass-through costs distort revenue. It is also easier to audit monthly without forensic debates.
Customer milestones still show up, often in software and B2B services. For example, an IT MSP where the seller claims three nearly closed contracts that would add 400,000 in annual recurring revenue. Tie the earn-out to those wins landing and staying billed for six months, rather than a hazy profitability target.
Whatever you choose, include a cap and a floor. Caps keep a windfall from outrunning value, floors prevent a trivial payout that poisons goodwill. If the deal pencil says 3.2 million total value, with 800,000 as earn-out, cap the earn-out at 800,000 and consider a small minimum if the seller hits a baseline.
The control problem, and how to solve it
The messiest earn-out fights boil down to control. Who decides pricing, hiring, marketing spend, or whether to invest in a new site? Buyers want freedom to run the company, sellers want assurance you will not underinvest to dodge payment.
There are proven ways to defuse this.
- Define a business plan annex that sets the broad budget envelope for the earn-out period, listing permitted growth investments, marketing ranges, and hiring plans. Buyers keep discretion within that framework. Carve out extraordinary items. New corporate allocations, one-off restructuring costs, and acquisition expenses do not hit the earn-out metric. Spell it out. Include a genuine information covenant. Monthly management accounts within ten business days, KPI dashboards, and quarterly review meetings. Sunlight reduces suspicion. Provide step-in consent only for material deviations. If spend exceeds a threshold, or if a non-compete for a key hire is waived, the seller’s consent is required, not unreasonably withheld. Set response times, for example five business days, so the business is not paralysed. Build a deadlock mechanism. If there is a dispute, trigger an independent accountant to decide using the agreed accounting policy schedule, binding within 30 days.
These tools do not remove every disagreement, but they turn fights into process, not personality.
Practical maths that buyers forget
If your bank lends 60 percent of the upfront price and you defer 30 percent in an earn-out, your cash need at completion drops sharply. That looks great. The part people miss is the real cost of that deferred component.
Suppose you agree to pay 300,000 over two years, tied to EBITDA, with a 50 percent weighting in year one and 50 percent in year two. If your cost of capital is 12 percent and the earn-out is not discounted, you just took on a two-year, unsecured, subordinated obligation that is economically expensive. Run the present value of the expected payout and compare it to adding more seller notes at a set interest rate. If you are paying near certain amounts, a clear note can be cheaper than a complex earn-out.
Also, be careful with timing. A quarterly calculation payable 30 days after quarter end keeps cash flow predictable. Monthly can work, but the admin load grows, and one bad month feels more dramatic than a quarter.
Case sketches from both sides of the Thames
A coffee chain with five sites across South London wanted 1.8 million. Trailing EBITDA was 380,000, inflated by a rent holiday on a new location in Peckham. The seller argued the site would ramp. We agreed 1.4 million at completion and an earn-out equal to 20 percent of site-level contribution from that one location for 18 months, capped at 400,000. We defined contribution, fixed the apportionment of head office costs, and excluded corporate rebranding. The shop hit stride in month eight, the seller earned 310,000, and both sides left happy. If we had tied it to consolidated EBITDA, the group’s decision to hire a regional manager would have sparked a fight.
A creative agency in East London posted 2.6 million revenue with two anchor clients. The founder insisted a third client was imminent. We agreed an earn-out that paid 15 percent of gross profit attributable to new clients signed in the first year, measured over their first six months of billing, with a 150,000 cap. The pipeline slipped, but the earn-out still paid 80,000, reflecting real wins. Tying it to total revenue would have paid for pass-through media spend that added no value.
An HVAC contractor in London, Ontario showed strong TTM results thanks to an unseasonably hot summer. A buyer I advised negotiated a two-step approach: 70 percent cash, 15 percent vendor take-back note at 8 percent interest, and a 15 percent earn-out based on service contract renewals over the next 24 months, capped at 450,000. The service work was the sticky part, and the formula matched it. The note replaced what would have been a nearly fixed earn-out tranche, saving them interest compared to the implicit cost of a guaranteed payout.
Legal and tax wrinkles, UK and Ontario
You will want advice anchored in your jurisdiction, but a few patterns repeat.
In the UK, earn-out receipts for sellers can be taxed as capital gains if structured properly, potentially qualifying for Business Asset Disposal Relief, which reduces the rate on the first 1 million of lifetime gains if conditions are met. If you tie the earn-out to the seller’s ongoing employment, HMRC may argue it is employment income. Keep the employment contract and the share purchase agreement cleanly separated, keep board minutes tidy, and be cautious with “good leaver” triggers that smell like salary.
In Canada, including Ontario, earn-outs often use the cost recovery method for tax on the seller’s side, where part of each payment Discover London businesses with Liquid Sunset is treated as capital gain as proceeds are collected. The Lifetime Capital Gains Exemption can apply to shares of a qualifying small business corporation, subject to detailed tests. If you are looking at businesses for sale London Ontario, raise the structuring question early with your accountant. Buyers care because after-tax proceeds drive seller flexibility on price, and poorly structured earn-outs can require gross-up negotiations.
In both places, decide how disputes are resolved, choose governing law aligned with the company’s domicile, and list the accounting policies in a schedule. Include a whole agreement clause and a clear non-compete with geographic scope that matches the market, whether that is Greater London or Middlesex County around London, Ontario.
Bankers and brokers on earn-outs
Debt providers like certainty and free cash flow coverage. A senior lender in the UK will rarely count an earn-out as debt in their leverage covenant, but they will ask about the cash outflow. Too large a contingent payout in the first year can trip your DSCR. Show them a sensitivity table with base, downside, and upside cases, with earn-out payments flexing accordingly.
Brokers can help or hinder. A focused business broker London Ontario, for example, might bring pragmatism about seasonality in contracting and how to tie an earn-out to maintenance renewals rather than new installs. In London, brokers who concentrate on professional services have seen the gross profit trap and can steer you toward the right metric. Whether you sourced a small business for sale London through a personal referral or a listing under buy a business in London, a competent intermediary reduces emotional friction during the earn-out period by keeping communication formal and scheduled.
If you are searching broadly, phrases like business for sale in london, buy a business london ontario, business for sale london ontario, or even the ungainly “business for sale london, ontario” will bring up a mixed bag: marketplaces, direct-owner posts, and boutique intermediaries. Off-market introductions through accountants and solicitors still yield the best conversations, and earn-outs are easier to negotiate before a public price anchors expectations.
Guardrails for clean drafting
Earn-outs fail in the grey. Eliminate grey.
Set the calendar. Define the start date, the number of periods, and the payment timeline. If the earn-out starts the first day after completion and runs for eight quarters, say exactly that.
Freeze the rulebook. State that the same accounting policies apply throughout the earn-out as those used in the preparation of the reference accounts, except where changes are required by law or generally accepted accounting principles. If a change is required, include a neutralizing adjustment to keep the earn-out economically consistent.
Protect both sides with caps and collars. Include a de minimis threshold where no payment is made if results fall below a minimum, and a cap to prevent extraordinary payouts. You can also include a collar that smooths payments if a single period is abnormally high or low.
Handle exits. If the buyer sells the company during the earn-out, does the seller get an accelerated payment, a payment at target, or does the earn-out transfer to the new owner? I prefer a clause that pays the expected value at target or a fixed multiple if control changes, so nobody games timing.
Specify records access. The seller’s right to inspect books should be reasonable, at times that do not disrupt operations, and limited to information relevant to the earn-out calculation. Give them the same monthly management pack you use to run the business. It builds trust and exposes issues early.
The people part you cannot spreadsheet
Two stories stay with me. In the first, a founder sold a specialized media agency in Soho. We tied the earn-out to gross profit from new clients and retained clients, each with a low cap. The seller stayed part-time, introduced their network generously, and we held structured, short monthly calls. The earn-out paid modestly in year one and hit the cap in year two when one large client renewed for three years. There were no arguments because the rules were clear and the rhythm was steady.
In the second, a small manufacturing business near Enfield changed hands. The earn-out was EBITDA based, but nobody locked the policy on inventory write-downs. The buyer cleaned up the balance sheet on day 90, correctly in my view, but it cratered the first period EBITDA and started a year of friction that bled into staff morale. The seller still earned a decent payout by the end, yet both sides felt bruised. A one-page accounting schedule would have prevented it.
Every earn-out is a relationship. Keep communication professional, predictable, and boring. Emotion is the tax you pay for ambiguity.
Short buyer’s checklist for earn-out sanity
- Choose a metric the seller can influence without controlling you, and define it in writing. Fix accounting policies in a schedule and name a dispute resolver up front. Set caps, floors, and a payment timetable that your cash flow can carry. Limit subjective adjustments and carve out extraordinary or group costs. Build a simple reporting pack and commit to a recurring review call.
Sector notes across London and London, Ontario
Hospitality and retail in London use revenue or site-level contribution. Tying an earn-out to like-for-like sales growth at specific locations can focus energy where the seller can truly help, such as staff retention and supplier pricing. Avoid full P&L based formulas that punish a buyer for standardized head office overhead.
Professional services and marketing agencies thrive on gross profit targets. If a seller claims a fat pipeline, link the earn-out to wins from that pipeline that stay billed for a minimum period. Reserve a separate mini-pool for key staff retention, paid even if revenue lags, to keep your engine intact.
Trades and home services, whether in Surrey or London, Ontario, do best with contract retention and service margin metrics. New installs are lumpy. Service work repeats and shows the real stickiness of the book. If you are working through business brokers London Ontario, you will find that lenders and appraisers respond better to predictable service revenue in their underwriting too.
E-commerce leans on contribution after advertising. A revenue share can pay for growth that is actually driven by a temporary ad blitz. Tie it to contribution after ad spend with a cap to prevent a Black Friday outlier from dictating the whole earn-out.
Light manufacturing should not use revenue. Too many knobs to twist. Gross margin percentage and machine utilization targets, measured over rolling quarters, reduce noise. Agree scrap rates and rework cost policies in the schedule.
How to keep the bank and the seller aligned
If your lender is on the fence, show them you have fenced the earn-out risks. Present a one-page summary: metric, period, cap, payment dates, and a three-case cash flow. Demonstrate that payments flex down in a downside case. Lenders care less about the theoretical headline price and more about coverage and predictability.
To the seller, present the earn-out as upside for their story, not a price cut with hoops. You can be transparent: the bank caps what you can close in cash, and this structure lets you honor their perceived value if the narrative proves out. Then hand them the reporting timetable, because certainty of process is worth as much as an extra half point in the percentage.
Where to find the right deals for an earn-out to shine
Some categories are poor fits for earn-outs. A distressed shop with collapsing revenue is better served by a lower cash price and a rescue plan, not a fantasy earn-out nobody expects to pay. On the other hand, succession-led small business for sale London postings where a founder is retiring but willing to transition client relationships are prime.
Look beyond the big marketplaces. Accountants and solicitors in your target borough hear about mandates first. Niche brokers who work specific lanes, from creative agencies to HVAC, see patterns and can set realistic earn-out terms. If you are in Southwestern Ontario, a business broker London Ontario with trades exposure can help calibrate service contract metrics. In the UK, an intermediary who knows media buying or MSPs can save you months of guessing. Whether you bump into names like liquid sunset business brokers or sunset business brokers in your search, what matters is their track record of getting earn-outs paid without drama.
The trade-offs that matter
Earn-outs are not smarter, they are different. You trade legal complexity and relationship management for lower cash at completion and risk sharing. If you have little appetite for post-close partnership, keep the earn-out small and mechanical. If you value the seller’s ongoing contributions, allow a modest upside for outperformance. Both sides need to feel they can win.
You will also trade speed for certainty. Earn-outs add pages to the SPA, push your lawyers to earn their fee, and require more diligence on accounting policies. If a seller wants a two week close and to be on a beach, this is not your tool.
The final trade-off is psychological. Paying an earn-out can sting if you think you would have hit those targets on your own. Paying it should feel neutral, because you priced it at the start. If you resent it later, you did not really agree the value. Price discipline at heads of terms stops regret at month eighteen.
Bringing it together in London
Buying a business London style means dealing with density, sector diversity, and a wide spectrum of seller sophistication. Earn-outs fit this environment because they adjust price to performance and ease financing constraints. Used well, they are fair. Used lazily, they sour a relationship that could have enriched both sides.
Walk into your next negotiation with a clear view: pick a metric that mirrors the value you are buying, lock the rules before completion, decide who controls what, and reduce everything to repeatable process. If your target is a small business for sale London Ontario, adjust for local tax and seasonality, and bring in a broker or accountant who has closed deals in that market. If your sights are on creative or tech companies in London, wrestle the gross profit definition to the ground and stop EBITDA debates before they start.
Earn-outs will not rescue a bad deal. They will, however, turn a good deal that is stuck on price into a partnership that pays both sides for what actually happens. In a city where outcomes vary by postcode, that is a tool worth mastering.