B2B SaaS Metrics Benchmarks: How Does Your Company Compare?

Why benchmarks matter

Every SaaS CFO gets asked the same question: "How do we compare?" Whether it comes from the board, investors, or the CEO, the answer requires context. A 90% gross margin is excellent for a SaaS company but meaningless without knowing that the median is 75%. A 15% monthly logo churn rate is catastrophic for enterprise but might be acceptable for a self-serve SMB product.

This article presents current B2B SaaS benchmarks across the metrics that matter most, segmented by company stage and customer segment. The data is drawn from publicly reported figures, investor surveys, and patterns observed across the companies I work with.

Use these benchmarks to identify where you are strong, where you are weak, and where the gap between your performance and the benchmark represents the biggest value creation opportunity.

Growth rate

Growth rate is the single most important metric for SaaS valuation. It correlates more strongly with valuation multiples than any other individual metric.

ARR growth benchmarks by stage

What good looks like: At £1-5m ARR (the typical Series A range), growing at 100%+ year-over-year places you in the top half. Below 50% growth at this stage makes fundraising significantly harder. Before benchmarking your growth rate, make sure your ARR is actually correct — most SaaS founders quote an ARR that doesn't match their P&L.

The "triple triple double double double" framework: The classic benchmark is to triple ARR from £1m to £3m, triple again to £9m, then double three times to £18m, £36m, and £72m. This represents a path to $100m ARR in approximately seven years. Very few companies achieve this, but it is the mental model US VCs use.

UK context: UK SaaS companies typically grow 10-20% slower than US equivalents at the same stage, partly due to smaller domestic market and partly due to typically smaller funding rounds. This is changing as more UK companies raise US capital early. See Raising from US Investors: Guide for UK SaaS Founders for how to access US capital markets.

Revenue retention

Revenue retention measures how much revenue you keep (and grow) from your existing customer base. It is the most reliable predictor of long-term SaaS business quality.

Net Revenue Retention (NRR)

NRR = (Beginning ARR + Expansion - Contraction - Churn) / Beginning ARR

What good looks like: NRR above 110% means your existing customer base grows by 10%+ per year even without adding new customers. This is the most powerful compound growth engine in SaaS and the metric that separates good companies from great ones.

World class: Snowflake, Twilio, and Datadog have all reported NRR above 130%. These are outliers, but they demonstrate what is possible when the product has strong expansion mechanics.

Below 100% is a problem. If NRR is below 100%, you are shrinking unless you add enough new customers to offset the erosion. This makes growth increasingly expensive and CAC increasingly important.

Gross Revenue Retention (GRR)

GRR = (Beginning ARR - Contraction - Churn) / Beginning ARR

GRR isolates the downside — how much you lose before expansion. A company with 120% NRR and 80% GRR has strong expansion but significant churn. That is a different business than one with 115% NRR and 95% GRR (less expansion but much less churn).

Investors increasingly look at GRR as a standalone metric because it measures the durability of the customer relationship, independent of upselling execution.

Churn

Logo churn (monthly)

The compounding problem: 3% monthly logo churn means you lose 31% of your customers per year. At that rate, you must acquire new customers equivalent to one-third of your base just to stay flat. This is why SMB SaaS companies with high churn need extremely efficient acquisition channels.

Involuntary churn: Failed payment churn (expired credit cards, insufficient funds) accounts for 20-40% of total churn in self-serve SaaS. Implementing dunning (automated payment retry and failed payment emails) can reduce total churn by 10-20%.

Revenue churn (monthly)

Revenue churn is usually lower than logo churn because smaller customers churn at higher rates. Your biggest customers (highest revenue) tend to be your stickiest.

Gross margin

SaaS gross margin benchmarks

What is included in COGS: Hosting and infrastructure, customer support salaries, third-party data/API costs, payment processing fees. Do NOT include R&D, sales, marketing, or G&A.

The 75% threshold: Below 75% SaaS gross margin, investors start questioning whether you have a true SaaS business or a services business with software. If professional services drag your blended margin below 70%, consider reporting SaaS margin and services margin separately to highlight the quality of the SaaS component.

Infrastructure costs at scale: SaaS infrastructure costs typically decrease as a percentage of revenue as you scale (hosting costs grow sub-linearly with customers). A company at £1m ARR spending 15% on infrastructure should be spending 8-10% at £10m ARR.

CAC and efficiency

CAC Payback Period

How to calculate: Fully loaded CAC divided by (monthly ARPU x gross margin %). "Fully loaded" means all sales and marketing expenses: salaries, commissions, tools, events, content, paid acquisition. Do not exclude sales salaries — investors will add them back.

CAC includes ramp time. If a new AE takes six months to ramp, you are paying their salary for six months before they produce at full capacity. Your CAC calculation should account for this by averaging across the full period, not just the months where deals close.

LTV:CAC Ratio

The over-efficiency trap: LTV:CAC above 5:1 is not always good news. It might mean you are under-investing in sales and marketing — leaving growth on the table. If your ratio is very high, the question is: can you deploy more capital into acquisition at a similar ratio?

Burn Multiple

Burn multiple = Net burn / Net new ARR

The burn multiple has become one of the most important efficiency metrics since 2022. Investors use it as a quick filter: above 2.0x at Series A or later, and they question the efficiency of your growth engine.

Operating metrics

Magic Number

Magic number = Net new ARR (quarter) / Sales and marketing spend (prior quarter)

Rule of 40

Rule of 40 = Revenue growth rate (%) + EBITDA margin (%)

At early stage, all of your Rule of 40 score comes from growth (you are not profitable). By Series C+, investors want to see a path to contribution from both growth and margin.

By-stage summary

Seed (£0-£500k ARR)

At seed, metrics are indicative, not definitive. Investors are betting on the team and the market. But if you have six months of data showing 8% monthly churn, that is a product problem that more capital will not fix.

Series A (£500k-£3m ARR)

Series A is where metrics start to matter. Investors will build cohort tables, calculate unit economics, and benchmark you against 50 other companies they have seen that quarter.

Series B (£3m-£15m ARR)

By Series B, your metrics must be genuinely strong, not just promising. Weak NRR or high churn at this stage indicates a product or market problem that scale will not resolve.

How to use these benchmarks

1. Identify the gap. Compare each metric to the median for your stage and segment. Where are you above? Where are you below?

2. Prioritise the outliers. A metric that is bottom-quartile is a more urgent fix than one that is just below median. Focus on the one or two metrics that are genuinely weak.

3. Understand the interactions. Growth and churn are linked — high churn requires high growth to compensate. NRR and gross margin are linked — expansion into higher-margin products improves both. Look for root causes, not symptoms.

4. Build the improvement plan. Each metric has specific levers. High churn? Improve onboarding and time-to-value. Low NRR? Build expansion pricing and cross-sell. High CAC? Optimise the funnel or move upmarket. For each weak metric, identify the two or three actions that will improve it and put them in your quarterly plan.

5. Track monthly, report quarterly. Metrics change slowly. Monthly tracking catches trends early. Quarterly reporting to the board keeps everyone focused without over-reacting to single-month noise.

For guidance on presenting these metrics to your board, see How to Create a Board Pack: Guide for SaaS Companies. For a detailed look at unit economics methodology, see Unit Economics for SaaS: The Complete Guide.