# Market

_Simma investor data room · Estimate · Plan · as of 2026-09-25_

## Sizing
*Estimate, 2026-09-24.* Priced at what a business would spend with Simma (subscription plus Simma Pay), not total software spend.
- **TAM ~£392bn a year** — every business worldwide, all sizes, priced to local incomes. £114.4bn of it in the UK and US.
- **SAM £62.3bn a year** — UK+US service businesses under 250 staff (19m businesses).
- **Beachhead £43.7bn a year** — service businesses with up to 9 staff, UK and US (17.9m businesses).
- **First customers £6.1bn a year** — Instruction, fitness & personal services (UK 85/93/96; US NAICS 61/713/812).

## Obtainable
*Plan.* **50,000 customers by the end of year 5** (47,000 micro, 2,500 small,
498 medium, 2 enterprise) — £116.5m revenue in year 5, £172.9m exit ARR,
0.28% of SAM. Built bottom-up from the customer ramp, not as a share of SAM.

## Sources
UK Business Population Estimates 2025; US Census NES/SUSB 2022; Eurostat 2023; World Bank 2025 income groups; SME Finance Forum / Statista.
Method: UK+US spend per head by size band x (group GNI per head / $83,022) x population; World Bank 2025.