Liquid Sunset Edge 3.0: Seller Notes to Buy a Business in London
Walk long enough along the Thames at twilight and you start to understand why deals happen in London. The city rewards patience, careful reading of signals, and a willingness to structure agreements that balance risk on both sides. Seller notes fit right into that cadence. They can bridge valuation gaps, get deals across the line when banks hesitate, and keep sellers invested in the buyer’s success. Done well, they feel like the glow on the water at dusk, subtle yet decisive. Done poorly, they turn into a tide that pulls both parties off course.
I have used seller notes to buy and sell companies, and I have seen them rescue good deals that would have died on the altar of underwriting. If you are looking to buy a business in London, especially with the city’s mix of owner-managed firms and tight debt markets, you should understand how a well-structured seller note can tilt the odds in your favour.
What a seller note really is
A seller note is simply a promise from the buyer to pay the seller a portion of the purchase price over time. It sits behind senior debt in priority, so if you default, the bank gets paid before the seller does. That subordination is what makes the note risky for the seller and therefore more flexible for the buyer.
Most seller notes in sub-£10 million transactions land between 10 and 40 percent of the total purchase price. Interest rates range widely, often from 6 to 12 percent in the UK market, sometimes stepping up after an initial period. Maturities tend to be two to five years, with amortisation structures that match the cash profile of the acquired company. Some sellers ask for interest-only payments for a year or more, followed by faster paydown. Others accept accrued interest that capitalises in the first 12 months, to give the buyer room to stabilise.
The core purpose is to close the funding gap between your available equity and what banks will lend, while maintaining a purchase price the seller finds acceptable.

Why seller notes are especially useful in London
London buyers face two realities. Banks have tightened credit standards for smaller, owner-run businesses, and competition for quality deals remains intense. A seller note can:
Reduce the equity cheque you need to write without paying all-cash at a premium valuation. Signal commitment and alignment, which matters to sellers who care about their staff and legacy. Help a buyer outbid rivals by offering the seller a better blended outcome: a reasonable upfront payment plus interest income over time.
The local angle matters too. If you are focused on neighbourhood service firms, boutique agencies, small manufacturing shops, or specialty distribution, owner involvement runs deep. Sellers who care about continuity often prefer a buyer who wants them to ride along on a note rather than a buyer who insists on squeezing price to the floor and paying all cash. For many founders, a reasonable coupon on a secured note feels safer than rolling the dice in the stock market.
Anatomy of a fair seller note
When I assess a seller note, I think in layers: security, repayment, flexibility, and governance. Each sits on top of the last, and you need all four.
Security. This means what backs the note. In a typical London deal, senior lenders take a debenture over the company. The seller takes a second-ranking debenture and sometimes a personal guarantee. If the business has hard assets, second liens are meaningful. For service businesses with intangible value, you need tighter covenants and information rights because security is thin.
Repayment. The schedule must fit the cash cycle. If the business has seasonal swings, structure interest-only months during low season. If margins will improve after integration, allow principal payments to step up in year two. A rigid flat amortisation schedule often forces bad operating decisions.
Flexibility. Two terms matter here: the ability to prepay without penalty, and clear rules for payment holidays if the business misses a covenant with the senior lender. Most sellers will accept prepayment after 12 months, often with a small premium if repaid in year one. For payment holidays, tie them to objective triggers, not vibes.
Governance. Give the seller information rights that build trust, not interference. Quarterly management accounts, rolling 13-week cash flow reports, and annual budgets are standard. If the seller has a meaningful note, they will sleep better seeing the numbers, and you will have an early warning system if things drift.
A working example with numbers
Say you plan to buy a heating and ventilation contractor in South London with £1.6 million revenue and £350,000 EBITDA. The business has a strong maintenance base and modest equipment needs. You agree a purchase price of £1.75 million, about 5 times EBITDA. Here is a workable stack:
Senior term loan: £900,000 at 8.5 percent, five-year term, 10 percent annual amortisation. Buyer equity: £350,000. Seller note: £500,000 at 10 percent interest, interest-only for the first 12 months, then amortised over 36 months with quarterly payments.
With this structure, the business needs to cover approximately £76,500 in first-year interest, plus senior amortisation and taxes. If free cash flow after tax and capex is around £240,000, you have cushion. You also preserve £150,000 of your equity for working capital and early integration costs. The seller receives a good price, an income stream of £50,000 interest in year one, and comfort that you are not bleeding the business to pay them.
The point is not the exact numbers, which vary by lender and company profile, but the logic. Match debt service to achievable cash generation and leave room for mistakes.
The conversations that matter before you agree a note
Seller notes are emotional contracts as much as financial ones. I try to surface expectations early, not during the final doc mark-up when everyone is tired.
Interest and timing. Sellers gravitate to round numbers. You might hear, “Ten percent, three years, first year interest-only.” Ask why. Sometimes the rate is a proxy for pride rather than risk. If the business is very stable, you can often trade rate for stronger security, or trade a lower rate for a shorter tenor.
Subordination details. Banks in the UK will require a subordination deed. Bring this up early. I once watched a deal stall three weeks because the seller’s solicitor misunderstood a payment blockage clause. Avoid that by sharing a template or at least summarising the bank’s standard positions.

Rights on sale or refinance. Clarify what happens if you refinance with a new lender or sell a minority stake to fund growth. Usually, the seller wants a partial take-out or a prepayment premium. Set it now, not after you have a term sheet on your desk and the seller feels boxed in.
Personal guarantees. For smaller deals, someone will likely put skin in the game via a PG. If the bank already has your guarantee, the seller may ask for a limited guarantee that activates only after specific defaults. Be careful stacking guarantees that could compound in bad scenarios.
Where a business broker in London can help and where they can hinder
Intermediaries in the city vary from independent brokers to corporate finance boutiques. If you search for a business broker London Ontario, you will find a different ecosystem, more mid-market manufacturing and local services across Southwestern Ontario. The London we are talking about here has its own rhythm, but the core broker dynamics are similar. A good broker can:
Filter sellers who truly accept the logic of a seller note from those who secretly expect an all-cash exit. Manage information flow to keep trust intact while you perform exhaustive diligence. Pressure-test the repayment model so the seller hears risks from a voice they already trust.
Less helpful brokers over-promise speed and gloss over subordination and covenant mechanics, which only delay the inevitable. If you need a seller note, make it central to your early conversations. The seller should understand why it is not a trick to lower price but a tool to optimise financing and share risk.
How to diligence a seller note with sceptical eyes
Underwrite the note the way a lender would. That means stripping optimism from your cash flow forecast and looking for brittle points that could break under real life.
Start with a conservative revenue base. If historical growth was 8 percent, underwrite 2 to 4 percent unless you have locked-in contracts. For a marketing agency, assume client churn offsets some wins. For a commercial maintenance company, weight recurring contracts more heavily than project work.
Scrutinise working capital. Growing firms soak cash. If your plan nudges revenue up by £150,000, the added receivables can quickly absorb the year one interest on the seller note. Ask for monthly AR ageing for the last two years. If average days sales outstanding is 48 and stretching, build that into your model.
Capex reality. In service-heavy businesses you might get away with low capex, but replacement vehicles, laptops, and software renewals still hit. If the seller claims capex is £10,000 a year, find purchase orders and service london ontario business for sale logs. Underwrite £20,000 to £30,000 unless evidence says otherwise.
Headroom tests. Run debt service coverage ratio scenarios at 1.2x, 1.0x, and 0.8x for each quarter in the first two years. Where do you breach? What measures can you take fast, and which are slow? If your only lever is price increases that take six months to implement, adjust your amortisation to match.
Legal diligence. The seller note documents can be short, but they should be professional. Avoid vague cure periods and fuzzy definitions. Define EBITDA if you use it, but remember that real-life payments come from cash, not adjusted profit.
The human side: sellers want to feel respected
A seller note is a vote of confidence in you. It says, “I will put part of my sale proceeds at risk because I believe you will run this business well.” That vote is personal. I have sat with owners who built a firm for 20 years and watched them lean forward when we talked about staff retention, customer care, and the tone of emails to suppliers. They want the cheque, but they also want relief.
Show you understand their pride. Offer them clean reporting and openness in the first year. Invite them to a quarterly lunch to talk through top-line and staff changes. You will get better intel than any spreadsheet can provide, and the relationship will support flexibility if you need to adjust the payment schedule after an unforeseen hiccup.
When not to use a seller note
Seller notes are not a magic wand. There are cases where they add complexity without benefit.
If bank debt alone comfortably funds the deal at a fair price and the business generates abundant cash, you might prefer a simple structure. Paying a seller 10 percent interest on a note you do not need drains cash for no reason.
If the seller is leaving operational chaos behind, you may want them completely out. Tying them to your success through a note can invite second-guessing or informal meddling that slows your decisions.
If the buyer team is undercapitalised and depends on rosy scenarios to meet debt service, a seller note becomes a liability waiting to explode. In that case, lower the price, raise more equity, or walk.
A word on valuations in the London market
Multiples in London vary by sector and quality. Small stable service firms with recurring revenue and clean books often sell for 4 to 6 times EBITDA. Higher growth tech-enabled services can fetch more, but lenders will haircut these without hard collateral. Manufacturing with good margins and diversified customers might land at 5 to 7 times, but diligence will pierce any fiction about concentration or quality of earnings.
When the seller expects 7 times for a fragile business, a seller note can bridge the gap if you believe your operational plan will shore up cash flow quickly. I have used earn-outs combined with seller notes to align interests when the seller’s story relies on near-term wins. For instance, tie a portion of principal repayments to the renewal of a key client contract, with a minimum payment floor to keep goodwill intact.
Papering the deal without killing it
Lawyers matter, but so does momentum. A seller note should be captured in a short, precise set of documents: the note itself, a subordination deed with the senior lender, a debenture or security agreement, and sometimes a warrant or kicker if the seller trades rate for upside.
Draft in plain English where you can. The seller must understand what happens if you miss a payment, how cure periods work, when interest capitalises, and what triggers acceleration. Avoid booby traps like cross-defaults to immaterial supplier disputes. Focus on defaults that correlate with real risk: insolvency events, non-payment after a clear grace period, breach of financial covenants that signal distress.
One clause worth attention is the cash sweep. Some sellers ask for a percent of excess cash above a threshold to accelerate principal. If you agree to a sweep, protect your working capital with a well-defined minimum cash covenant and carve out capex reserves. The last thing you want is to starve the business to pay down a note faster than your plan can support.
The first 180 days after closing
The odd thing about seller notes is that their real test begins after the champagne flutes go back in the cupboard. The first six months decide whether the note becomes a cooperative partnership or a looming threat.
Communicate on a cadence. Send a brief monthly note with revenue, gross margin, cash on hand, and pipeline highlights, followed by quarterly financials. Invite questions rather than waiting for them.
Protect your calendar time for integration. You will be tempted to chase new business, but integration wins are what pay the note: tighter scheduling, cleaner billing, faster collections, smarter purchasing. A three-day improvement in DSO often equals a month of note interest in cash terms.
Track covenant headroom like oxygen. Build a simple dashboard that shows senior lender covenants, the seller note payment calendar, and upcoming one-off expenses. Know your cushions. Avoid surprises.
Common pitfalls that trip otherwise good buyers
Optimism about synergies. Most promised synergies arrive late and partially. Underwrite cost savings conservatively, and do not schedule note repayments on the back of savings you have not banked.
Overpaying for speed. I have seen buyers stretch beyond defensible valuation just to beat a rival. They then use a seller note to plug a hole created by their own impatience. Discipline matters. If the price exceeds what your cash model can support at a 1.2x to 1.4x coverage, pause.
Thin documentation. Friendly deals unravel when terms are fuzzy. Handshakes are lovely until cash gets tight. Write it down, clearly.
Cultural misfit. If the seller’s team senses a culture clash, they will hesitate, productivity dips, and collections slow. Suddenly your DSCR shrinks. A small investment in listening tours and transparent change plans pays dividends, and it protects your ability to service the note.
The local search mindset and where to find deals
If you want to buy a business in London, your pipeline will decide your fate. Traditional listings describe “business for sale London, Ontario” as a phrase that anchors searches on another continent. You will see similar phrasing on UK portals for “business for sale London” with no comma, same concept, different city. Either way, public marketplaces can be noisy. In London, many quality owner-managed firms change hands quietly.
Advisers and sector networks matter. Accountants who serve small firms, trade associations, and even local suppliers will know who is thinking about retirement. When you talk to owners, be upfront that you favour seller notes as a tool to smooth the transition. Sellers who respond positively are your target group.
A short checklist for a robust seller note
Cash flow fit: stress test DSCR quarterly under base, downside, and flat scenarios. Clear subordination: align bank and seller expectations early with a draft deed. Thoughtful amortisation: interest-only where needed, step-ups aligned to real triggers. Information rights: quarterly accounts, 13-week cash flow, annual plan, and open Q&A. Exit rules: prepayment rights and refinance outcomes defined without ambiguity.
The quiet edge of seller alignment
Liquid Sunset Edge 3.0 is not software, it is a mindset. If you structure the seller note to be fair, you create a reserve of goodwill that carries you through bumps. The seller becomes an ally who calls when a customer hesitates, who warns you about seasonal weirdness or a staff member on the brink of leaving, who takes a slightly lower rate if you rework the schedule after a bad quarter because they believe you are doing the right things.
That alignment is your edge in London, where deals often come down to trust and nuance as much as capital. Use the seller note to buy time, build credibility, and keep everyone rowing in the same direction. Then run the business with clarity and restraint, and let the numbers do what well-run numbers do.

The city will test you. Trains run late, clients change procurement processes, a key engineer falls ill, and cash tightens just when a payment is due. If the seller note is built on sturdy cash assumptions, transparent reporting, and reasonable flexibility, it will hold. And if you handle that first wobble with candour and poise, you will find that the note does not just finance your acquisition. It binds your deal with a quiet confidence that makes the next decision easier, and the one after that easier still.
A final thought for those still shaping their search: speak early with lenders to learn their current subordination stance. Bring that perspective into your first seller meetings. It marks you as someone who knows how deals actually get financed in this city. When you finally meet the right owner at the right price, your seller note will not be a concession, it will be the mechanism that turns a handshake at sunset into a business you own by sunrise.