Every time you run a LumixAI tool, the output is benchmarked against real data — not generic rules of thumb. This page explains exactly where our benchmark data comes from, how it is applied, how frequently it is reviewed, and why every output is specific to the reality of running a business in the UK.
Generic benchmarks — "a good gross margin is 40%" — are useful as a starting point but misleading in practice. A wholesale distributor and a professional services firm have completely different cost structures. A business importing from Asia has a different margin reality to one buying domestically.
LumixAI benchmarks are sector-aware where data permits, UK-specific by default, and drawn from authoritative public and institutional sources. Where real-time data is available, it is pulled automatically. Where sector data requires manual curation, it is reviewed quarterly by our commercial team against published sources.
Every benchmark shown in a LumixAI output is traceable to a named source. We do not invent ranges. If a benchmark cannot be sourced from a credible UK authority, we flag it as indicative and explain why.
The benchmarks applied across LumixAI tools are drawn from the following authoritative UK sources:
| Data area | Primary source | How applied |
|---|---|---|
| Gross & net margin benchmarks | ONS Business Survey, HMRC SME statistics | Sector-adjusted ranges shown in margin tools and health score |
| Bank of England base rate | Bank of England (live API) | Auto-applied to cashflow and cost of debt calculations — updated on page load |
| CPI inflation | ONS Consumer Price Index (monthly) | Used in cost escalation alerts and real margin calculations |
| GBP/USD, GBP/EUR exchange rates | Open Exchange Rates / ECB reference rates | Live rates in Import Cost Calculator FX stress test and Daily Briefing |
| UK energy prices | Ofgem, BEIS energy statistics | Used in Daily Briefing and cost benchmarks for energy-intensive businesses |
| Asia–UK freight rates | Freightos Baltic Index | Referenced in Import Cost Calculator guidance and Daily Briefing |
| Employer NI rates & thresholds | HMRC (updated each tax year) | Auto-applied in Headcount Cost Modeller — updated at each Budget/tax year change |
| National Living Wage | Low Pay Commission / HMRC | Used as minimum wage floor in headcount calculations |
| VAT rates & thresholds | HMRC | Applied in VAT Cash Flow Planner — updated at each Budget |
| UK trade tariff duty rates | HMRC UK Global Tariff (GOV.UK) | Guidance references in Import Cost Calculator; user enters commodity-specific rate |
| SME financial health benchmarks | British Business Bank, FSB Small Business Index | Sector comparison ranges in Free AI Business Review and commercial health score |
| Marketing ROAS benchmarks | Nielsen, IPA Effectiveness Databank (UK) | ROAS benchmarks (2–5x) in Marketing Analysis Tool |
| 3PL warehousing cost benchmark | UK Warehousing Association, Logistics UK annual cost surveys | £2.80/unit benchmark in Warehouse Cost Analyser |
| LTV:CAC benchmarks | SaaS Capital, Harvard Business Review (sector-adjusted) | 3:1 LTV:CAC healthy benchmark in LTV:CAC Calculator |
When you run any LumixAI tool, your figures are compared against the relevant benchmark range for that metric. The output shows:
All benchmarks reflect UK market conditions — HMRC rates, UK wage legislation, sterling-denominated costs, and UK SME survey data. No US or EU defaults applied.
Static benchmarks (margins, ROAS, LTV:CAC) are reviewed by our commercial team each quarter against published institutional sources and updated where the data has moved.
Interest rates, exchange rates, energy prices and freight costs are pulled in real time where APIs are available — so the context around your numbers reflects today, not last year.
Tools that use AI to generate narrative analysis (the Full AI Business Report, Upload & Analyse, and the Free AI Business Review) generate text based on your specific inputs combined with the benchmark context above. The AI does not invent figures — it interprets the calculated outputs against the benchmark data and translates them into plain-English commercial commentary.
Every AI narrative output references the underlying calculated figure. If a tool says your gross margin is "significantly below benchmark", that statement is grounded in a specific calculated percentage compared against a named benchmark range — not a general observation.
Does: Interpret your calculated figures in context, apply benchmark comparisons, generate plain-English actions based on the gaps identified, and flag where data is outside normal ranges.
Does not: Invent financial figures, make up benchmark ranges, or give regulatory or legal advice. Every number in an AI output traces back to your inputs or a named data source.
LumixAI tools that incorporate UK statutory rates — National Living Wage, Employer National Insurance thresholds, VAT rates, Corporation Tax rates — are updated within 5 business days of any change announced by HMRC or the Chancellor at Budget. This includes:
Users who have run analyses before a rate change are shown a prompt to re-run with updated inputs when a statutory change has been applied.
LumixAI outputs are commercial intelligence tools — not regulated financial advice. The benchmarks and analysis are designed to give business owners a clear, data-grounded picture of their commercial position. They are not a substitute for advice from a qualified accountant, financial adviser, or solicitor where such advice is required.
Sector benchmarks are averages. Your business may legitimately operate outside a benchmark range for valid structural reasons. The tool flags the gap — it is your job, with your commercial knowledge, to determine whether action is required.
Run the free AI Business Review — five numbers, instant output, benchmarked against real UK SME data.
Data sources and benchmarks last reviewed: April 2026. For questions about our data methodology, contact hello@lumixai.co.uk.