Small business owners receive complex offers with earnouts, tie-ins, deferred payments, and tax implications but lack tools to compare them financially — leading to regret and suboptimal decisions.
Interactive calculator where sellers input offer terms (upfront %, earnout structure, tie-in years, tax regime like BADR) and see net present value comparisons, after-tax proceeds, and risk-adjusted outcomes across multiple offers side by side.
One-time purchase £199 or SaaS £49/month during active deal process. Upsell to broker/advisor multi-seat licenses.
This is a once-in-a-lifetime financial decision where the stakes are enormous (often the seller's entire net worth). The pain signals are real — sellers accept complex structures (earnouts, tie-ins, deferred payments) without understanding the true NPV or tax consequences. The Reddit post shows someone asking 'could I have got a better deal?' AFTER selling. Regret-driven pain on a high-stakes, irreversible decision scores very high. Docked 2 points because the pain is acute but infrequent — each seller only needs this once.
~35,000–60,000 addressable sellers per year (US+UK) sounds decent but conversion rates will be low — many sell through brokers who handle this, many don't know this tool exists until it's too late. At £199 one-time or £49/month for ~3–6 months, realistic TAM is £5M–£15M/year from sellers alone. The broker/advisor upsell (multi-seat licenses) could 2–3x this. It's a viable niche business but not a venture-scale market without expanding into adjacent use cases (franchise buyers, business buyers, M&A advisory firms).
When someone is selling a business for £500K–£5M, paying £199 or even £500 to understand whether Offer A is actually worth £80K more than Offer B after tax is an absolute no-brainer. The decision context makes the price trivial — this is a 'save me from a £100K mistake' tool. Brokers and advisors, who can amortize across deals, have even higher willingness. The key pricing insight from the Reddit post: one seller saved £130K in tax through proper structuring. A tool that helps with that is easily worth hundreds.
Core NPV/DCF calculations are straightforward. The tax logic is the hard part — BADR rules, capital gains tiers, asset vs. stock sale treatment, installment sale rules vary by jurisdiction and change regularly. A solo dev can build the financial calculator MVP in 4–6 weeks, but accurate tax modeling for both UK and US adds significant complexity. Recommend starting with UK-only (BADR + CGT) to limit scope. Earnout probability modeling and risk-adjustment add further depth but can be phased. No AI/ML needed — this is fundamentally a well-designed financial calculator.
This is genuine whitespace. No SaaS product exists that lets a small business seller input 2–3 offers and see side-by-side NPV, after-tax proceeds, and risk-adjusted outcomes. The closest substitute is a £5K+ bespoke spreadsheet from an M&A accountant. Valuation tools (ValuAdder, Equidam) stop before deal structuring begins. M&A platforms (DealRoom, Midaxo) serve buyers. The specific combination of earnout modeling + tax-aware analysis + multi-offer comparison for sellers is completely unserved.
This is the biggest weakness. A business sale is a one-time event — sellers need this tool for 3–6 months during their deal process, then never again. The £49/month SaaS model works during the deal window but churn is structural and 100%. The recurring play depends entirely on serving brokers/advisors who do multiple deals per year. Without pivoting toward the advisor market, this is fundamentally a one-time purchase business, which limits LTV and makes CAC recovery harder.
- +Genuine whitespace — no competitor serves this specific need, making positioning trivially easy
- +Extremely high willingness-to-pay relative to price — a £199 tool on a £1M+ decision is impulse-buy territory
- +Strong emotional hook: 'see what each offer is actually worth' eliminates seller's #1 fear (regret)
- +Macro tailwind from baby boomer retirement wave driving increasing deal volume for years
- +Dual-market opportunity: seller-facing MVP can expand to broker/advisor SaaS with higher LTV
- !Structural churn — each seller is a one-time customer, making pure seller-side SaaS economics very difficult
- !Tax accuracy liability — if the tool gives wrong tax calculations, the reputational and legal risk is significant. Needs strong disclaimers and potentially accountant review integration
- !Discovery problem — sellers don't know they need this tool until they're already in a deal, and may not find it in time. Distribution through brokers, accountants, and M&A lawyers is critical
- !Scope creep from jurisdiction-specific tax rules — supporting US + UK properly doubles the tax logic workload, and each country has states/regions with different treatment
- !Brokers may resist a tool that empowers sellers to evaluate deals independently, as it could undermine their advisory role and negotiating leverage
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Custom spreadsheets built by accountants, brokers, or sellers themselves to model deal terms and compare offers
Basic online tool offering simple business valuation and a sale-planning checklist for business sellers
M&A lifecycle management platform covering deal pipeline, virtual data rooms, due diligence, and post-merger integration
UK-only web app focused on healthcare/dental practice sales (the niche from the Reddit signal). Seller inputs: deal price, upfront %, earnout structure (% of revenue/EBITDA, duration, caps), tie-in period, deferred payment schedule, number of shareholders, BADR eligibility. Outputs: side-by-side comparison of up to 3 offers showing gross proceeds timeline, after-tax proceeds (with BADR applied), NPV at configurable discount rates, risk-adjusted earnout value (with probability sliders), and total effective price as a multiple of EBITDA. Clean, opinionated UI — not a spreadsheet. Ship in 5–6 weeks.
Launch at £199 one-time for sellers (high conversion, simple). Add £49/month option for sellers in active 3–6 month deal processes who want scenario updates. Within 6 months, launch broker/advisor tier at £149/month per seat with white-labeling, client management, and PDF report generation. Within 12 months, add US market (capital gains, installment sale, S-corp vs C-corp treatment). Long-term: affiliate/referral revenue from connecting sellers to vetted M&A accountants and lawyers.
6–8 weeks to MVP launch, first revenue within 8–10 weeks. The buyer exists today (people selling healthcare practices right now). Distribution via Reddit communities (r/smallbusiness, r/dentistry, r/Entrepreneur), UK dental/healthcare practice sale Facebook groups, and direct outreach to 2–3 UK healthcare M&A brokers for pilot partnerships. First 10 paying customers within 12 weeks is realistic.
- “75% on day 1 and 25% on a turnover plus 3%”
- “4 year tie-in which is long but everyone offered the same”
- “saving £130k in tax (4 family shareholders)”
- “could I have got a better deal?”