CIS-first invoicing
Frequent cash-and-tax workflow; clear UK language; easiest to validate through real invoices and remittances.
Executive dashboard
The decision, first
Only four opportunities survived the stronger gate. Test CIS-first invoicing first, then add RAMS only if paying users ask for the adjacent workflow. Employment compliance and the garage front desk remain credible standalone alternatives.
4opportunities that cleared the gate
3 + 1standalone tests and companion
170£59 bundle customers for £10,030 MRR
£29first product’s proposed monthly price
Recommended path
One construction platform. Two narrow modules.
Start with quotes, CIS-aware invoices and remittance reconciliation. Earn the right to add RAMS review, version approval and worker acknowledgement. Shared jobs, clients, sites and workers make this a genuine pair—not portfolio sprawl.
Employment-rights tracker
Strong standalone ARPA and regulatory urgency, but users may demand advice rather than software.
Small-garage front desk
Daily operational use and strong retention potential; test migration and integration demands before code.
RAMS approval + sign-off
Strong companion only. Win on approval evidence, not unsafe “AI-compliant” document generation.
Strict shortlist
Every row is testable
Search the four retained opportunities. Scores remain judgement-led summaries, not forecasts; “competition” scores higher when the field is more manageable.
Showing all 4 opportunities.
| # | Opportunity | Market | ARPA | Customers | Demand | Pain | Diff. | UK fit | Reach | MVP | Revenue | Retention | Competition | £10k | Mean | Decision |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | CIS-first invoicing | UK | £29 | 345 | 9 | 8 | 8 | 10 | 8 | 7 | 8 | 9 | 5 | 8 | 8.0 | Test first |
| 2 | Employment-rights tracker | UK | £79 | 127 | 10 | 8 | 8 | 10 | 7 | 7 | 9 | 9 | 4 | 8 | 8.0 | Strong |
| 3 | Small-garage front desk | UK | £69 | 145 | 9 | 8 | 7 | 10 | 7 | 6 | 9 | 9 | 5 | 8 | 7.8 | Strong |
| 4 | RAMS approval + sign-off | UK | £39 | 257 | 9 | 8 | 7 | 10 | 8 | 7 | 8 | 8 | 4 | 7 | 7.6 | Strong companion |
No conditional or crowded ideas are included.Confirmed evidence does not make any score a forecast.
Opportunity dossiers
What you can test now
Open each dossier for the evidence, incumbent pattern, recurring pain, market wedge, MVP, economics and failure case.
confirmed inference test01CIS-first invoicing for subcontractorsInvoicing/accounting · UK construction sole traders and micro-firms8.0 / 10
“CIS correct before the invoice leaves your phone.”
Established payment
Xero, QuickBooks, FreeAgent, Tradify, Powered Now and Joist charge for accounting, trade workflow or contractor invoicing. HMRC says MTD Income Tax is live above £50k and extends to £30k in 2027 and £20k in 2028.
Incumbent pattern
General ledgers bundle bank reconciliation, VAT, reports and add-ons; trade suites add job scheduling and teams; Joist is simple but not UK CIS/MTD-first.
Validated recurring pain
Recent discussions repeat the same loop: software feels overbuilt, labour/material deductions confuse users, remittance statements do not reconcile cleanly and reverse-charge wording creates uncertainty. This happens whenever money is received—not once a year.
Feature translation
Explicit labour/material lines; deduction preview; reverse-charge wording; remittance PDF extraction with review; gross/withheld/cash view; accountant-ready audit export.
Why incumbents leave room
General ledgers optimise for accountants and many sectors; trade suites optimise scheduling. The narrow “subcontractor being paid” workflow is too small to reshape their products and can cannibalise add-ons.
MVP / later
Essential: customer/job, quote-to-invoice, CIS/reverse-charge rules, PDF/share, payment/remittance match, reminders, export. Later: bank feeds, receipts, accountant portal and recognised HMRC submission.
Economics & route
£19 Solo / £29 Pro / £59 RAMS bundle. 345 at £29 = £10,005 MRR. Reach through CIS accountants, trade communities, merchants and demonstration-led content. Self-serve to seven-day cycle.
Failure / test
Could fail because FreeAgent/Xero is good enough or free through banks, buyers cap willingness near £10, or HMRC assurance is underestimated. Require 10 paid users, repeat use and accountant-verified scenarios.
Representative evidence
HMRC MTDHMRC populationTradifyJoist reviewsCIS/MTD discussionCIS workflow
02Employment-rights rollout trackerHR compliance · UK employers with 5–49 staff and no HR team8.0 / 10
“Employment-law actions for under 50 staff. £79. Cancel any time. No sales call.”
Established payment
BrightHR, Breathe, Peninsula, Citation and Croner sell HR software/advice. BrightHR starts around £3 per employee; its review volume is in the thousands. Breathe reports 16,000+ UK SMEs.
Regulatory trigger
Government’s July 2026 timeline confirms phased Employment Rights Act work; six-month unfair-dismissal qualification is expected January 2027. The 2026 compensatory cap is £123,543.
Validated recurring pain
Users pay for leave records and advice, but cross-platform complaints repeat high-pressure sales, quote-only prices, long contracts, narrow cancellation windows and automatic renewal. Small firms ask for compliant basics rather than an HR suite.
Feature translation
Dated obligation feed; named tasks/evidence; new-hire six-month clock; prompts at weeks 4/12/20/22; training/policy acknowledgements; tribunal-ready export.
Why room remains
Broad bundles, per-head expansion, helplines and insurance drive incumbent economics. A transparent software-only tool undermines that model.
MVP / later
Essential: timeline, employee clocks, task/evidence log, reviewed template set, reminders/export. Later: adviser network, HRIS/payroll integrations and insurance. No case-specific legal advice in v1.
Economics & route
£49 / £79 / £119 by headcount; 127 at £79 = £10,033 MRR. Accountants, payroll bureaux, employment solicitors, chambers and franchisors. One-to-four-week sale; high retention and support.
Failure / test
Buyers may require advice/insurance or distrust a young vendor with dismissal evidence. Secure paid employers and a practising-solicitor content agreement before build.
Representative evidence
Official timelineBrightHR pricingTrustpilotCitation discussionPeninsula reviews
03One-to-five-bay garage front deskWorkshop management · small UK MOT/service/repair garages7.8 / 10
“Today’s jobs, approvals and invoices—without an ERP.”
Established payment
Garage Hive starts at £145/month; public comparisons place TechMan around £189–£415 and simpler systems around £50–£120. Great Britain had 22,448 active MOT stations in 2024–25.
Incumbent pattern
Full workshop control: diary, job sheets, estimates/invoices, reminders, technician time, parts, stock, courtesy cars, DVSA and accounting integrations.
Validated recurring pain
UK discussions compare many tools and describe some as complicated, US-centric or costly after licences/onboarding. Paper diary + invoices + WhatsApp photos is the repeated workaround. Independent review volume is thin, so primary interviews matter more.
Feature translation
Live day-board; vehicle/customer; voice-to-job notes and photos; approval by link; approved estimate to invoice; service/MOT reminders; simple daily cash view.
Why room remains
Incumbents retain and monetise through more modules, seats and integrations. A shallow product for one-to-five bays produces less ARPA.
MVP / later
Essential: records, day-board, job card, estimate/approval, invoice, reminders, import/export. Later: DVSA/VRM data, parts, stock, time clock, booking and payments.
Economics & route
£69/workshop; 145 = £10,005 MRR. Garage visits, factors, MOT trainers and trade media. Two-to-six-week sale; excellent retention but costly migration/support.
Failure / test
Could require integrations before switching, or migration may destroy CAC. Five pilots must import real histories and run the working day for four weeks.
Representative evidence
04RAMS approval and worker acknowledgementConstruction safety workflow · subcontractors with 2–20 workers7.6 / 10
“Get RAMS approved and signed—not merely generated.”
Established payment
HandsHQ, RAMs App and HS Direct monetise RAMS/COSHH/training. HandsHQ includes content, digital signatures, approval and integrations; Capterra users say it replaces difficult Word/Excel work and saves hours.
Validated recurring pain
Small firms spend time adapting templates. Reviewers report clicks, COSHH search and re-entry friction. More importantly, safety professionals warn generic/fast AI RAMS can be rejected or unsafe and require competent, site-specific review.
Real wedge
The costly loop is submit → reject/comment → revise → reissue → brief workers → prove the current version was seen. PDF generation is already crowded.
Feature translation
Import existing documents; site-specific cover; client comments by section; version comparison; old-link invalidation; QR worker acknowledgement; competence expiry; audit export.
Why room remains
Established tools monetise proprietary content. Supporting arbitrary Word/PDF documents and low-cost external reviewers weakens that lock-in.
MVP / later
Essential: upload, review/comments, states, versions, QR sign-off, worker register/export. Later: authoring content, COSHH, CPP, principal-contractor integrations and AI completeness checks.
Economics & route
£19 Solo / £39 Team / £59 bundle; 257 at £39 = £10,023. Same channels as invoicing plus H&S consultants and principal contractors.
Failure / test
Principal contractors may force their own portals; users may expect content; liability may be uneconomic. Validate rejection frequency with both sides and obtain professional-indemnity advice.
Representative evidence
HandsHQPlans/featuresCapterra reviewsHSESmall-firm discussionSafety warning
Revenue scenarios
Arithmetic, not prophecy
The numbers show the shape of each business. They exclude VAT, fees, refunds and discounts; none is a market-share forecast.
| Model | Customer mix | MRR | Commercial reading |
|---|---|---|---|
| CIS invoicing only | 345 × £29 | £10,005 | Simple story; larger support base |
| Employment tracker | 127 × £79 | £10,033 | Fewer accounts; legal support risk |
| Garage workflow | 145 × £69 | £10,005 | Strong retention; migration-heavy |
| Construction bundle | 170 × £59 | £10,030 | Best shared-audience route |
| Construction mixed | 120 bundle + 80 invoice + 20 RAMS | £10,180 | Credible staged portfolio |
Low-cost validation
Four tests you can run
Each opportunity has a manual or prototype test that avoids building the complete product. Complaints, survey enthusiasm and free waitlists do not clear the gate.
Recruit 20 subcontractors through accountants and trade groups. Rebuild their last invoices and remittances manually; ask ten to pay £29 for the next month.
14 days · £150–£300Give ten 5–49-person employers a solicitor-reviewed obligation board. Charge £79 for a month of updates, evidence prompts and one export—without offering advice.
21 days · £250–£600Visit ten independent garages. Import one week's jobs into a clickable day-board; run five paid pilots alongside paper without replacing the existing system.
30 days · £200–£500Only test after construction buyers engage. Process 20 real submit–comment–revise–sign loops using existing PDFs; ask five teams to pay £39 for the evidence layer.
21 days · under £300Go only if
- 10 customers pay or place a meaningful deposit at the stated price.
- 70% repeat the workflow during the test.
- 12/20 observed users have monthly CIS pain with measurable cost.
- Two CIS accountants clear 30 scenarios with no unresolved error.
- A credible route exists below roughly £100 CAC or through a committed partner.
- HMRC route and ongoing support are costed.
No-go or reshape if
- Users praise simplicity but will not pay £29.
- Fewer than half repeat within 30 days.
- Most have an adequate free bank/accountant bundle.
- Tax edge cases require ongoing accountant intervention.
- Full bookkeeping, payroll, scheduling and bank feeds are demanded before switching.
- Qualified CAC exceeds six months of gross profit without a partner channel.
Method & limitations
How to read the evidence
Official sources establish rules and dates; vendor pages establish features and public prices; independent reviews and discussions expose workflows. None substitutes for paid customer discovery.
Seven-step screen
- Find multiple paid incumbents and recurring use.
- Define one narrow profession, context, rule or pricing mismatch.
- Triangulate official pages, pricing, reviews and discussions.
- Separate repeated paid jobs from product-specific bugs.
- Translate pain into the smallest measurable outcome.
- Test reach, retention, support, regulatory and integration load.
- Score comparatively; validate with money before build.
Limitations
This is desk research dated 6 August 2026. Review indexing is incomplete; B2B UK niches have sparse public feedback; vendor customer/savings claims are not audited; pricing changes; no market-size forecast is asserted. Legal, tax and safety content can change. New 2026 entrants validate competition, not durable demand. Scores express judgement, not probabilities.
This edition intentionally excludes six earlier options. They were not replaced: a shorter report is more useful than a ten-item list padded with crowded, conditional or access-dependent ideas.