The map isn't uniform
UK Ltd incorporations are not evenly distributed across the country. If you are prospecting new companies in a postcode area with 5,000 formations per year, your pipeline maths is very different from a postcode area with 400 formations per year — and most accountants have never checked which they are in.
Here is what a rough tier structure looks like, based on aggregated Companies House data over rolling 12-month windows in recent years:
Tier 1 — 3,000+ new Ltd companies per year per postcode district (city centres)
Central London (EC, W1, WC, SW1), central Manchester (M1-M4), central Birmingham (B1-B5), central Leeds (LS1-LS2), central Bristol (BS1-BS8), central Edinburgh (EH1-EH3), central Glasgow (G1-G3).
Realistic prospecting maths for a solo accountant: 60-100 new-Ltd formations per week matching a typical 5-SIC-code filter. This is easily enough volume to support a highly-targeted prospecting habit, but the competition from other accountants is also fierce. Differentiation on niche is essential — "generalist accountant in EC2" is a saturated positioning.
Tier 2 — 500-3,000 new Ltd companies per year per postcode district (large-town / outer-city)
Reading (RG), Cambridge (CB), Oxford (OX), Nottingham (NG), Sheffield (S), Liverpool (L), Newcastle (NE), Cardiff (CF), Brighton (BN).
Realistic maths: 15-40 new-Ltd formations per week matching a 5-SIC-code filter. Sweet spot for a small firm — enough volume to keep pipeline full, competition is lower than tier 1, and warmer "we're both local" outreach dynamic.
Tier 3 — under 500 new Ltd companies per year per postcode district (smaller towns)
Most of the UK outside the tier 1/2 postcodes. Yorkshire market towns, mid-Wales, Cornish coast, Highlands, Kent villages.
Realistic maths: 2-8 new-Ltd formations per week matching a 5-SIC-code filter. Below the volume threshold for pure new-Ltd prospecting to fill a book. Practices in tier 3 areas typically need to combine new-Ltd outreach with referrals, local business networks, and offering services to non-Ltd sole traders as well.
What this means for your filter setup
If you are in a tier 1 area, tighten your SIC filter. 5-6 SIC codes is usually enough; more will drown you in noise.
If you are in a tier 2 area, broaden your SIC filter to 8-12 codes to keep volume up. Consider adding a couple of adjacent postcode areas (e.g. an Oxford accountant might add Bicester OX26 and Abingdon OX14 for meaningful uplift).
If you are in a tier 3 area, cover multiple postcode areas covering your realistic driving radius (~30 miles). Also consider adding services to sole traders and partnerships alongside new-Ltd outreach — the register-only signal is not enough in low-density areas.
The sector overlay
Postcode density and sector density interact in useful ways:
- Tech (SIC 62012/62020): hot in Reading, Cambridge, London (EC), Manchester (M4), Edinburgh (EH). Sparse everywhere else.
- Property development (SIC 41100): steady across most tier-1/2 postcodes; London and Manchester dominate volume.
- Hospitality (SIC 56101/56102): higher relative density in coastal / tourist postcodes even when tier 3 (e.g. TR Cornwall, LA Cumbria, PL Devon).
- E-commerce (SIC 47910/47990): distributed almost uniformly across the country — home-based businesses. Tier 2/3 postcodes underserved by London-focused competitors.
The strategic implication
The best-served niches are London-EC-tech and London-EC-property. The most underserved combinations are e-commerce Ltds in tier-2 postcodes (RG, CB, OX, NG, NE) and hospitality Ltds in tier-3 coastal areas. If you can be the go-to accountant for one of those, you compete with far fewer other providers.
How Formation Alert lets you exploit this
Formation Alert takes your chosen SIC codes and postcode areas and delivers matching new-Ltd companies every Tuesday 8am. You get to pick a wedge — e.g. "e-commerce Ltds in Cambridge and Oxford" — and be the first accountant to reach out to every one of them, week after week. £49/month, 7-day free trial. Try it.