Annual Recurring Revenue (ARR)

A data analytics platform's total ARR was £10 million, with 85% from new customers and 15% from expansion. When they focused product efforts on expanding within existing customers, expansion revenue grew to 35% of new ARR. This shift reduced acquisition pressure; they could grow ARR faster with the same sales headcount because customers were upgrading and buying more features.

A project management tool started 2023 with £2 million ARR. They grew 50% to £3 million in 2024. Of that £1 million growth, £1.5 million came from new customer acquisition and £300K from expansion revenue in existing customers. But they also lost £800K to churn, indicating their net growth was really £1.8 million minus losses. Understanding these movements let them prioritise retention improvements alongside new sales.

Shows true business health

Revenue that recurs each month is more valuable than one-time revenue. A company with £1 million in recurring revenue is more valuable than a company with £1 million in one-time sales and high churn. ARR growth is the scorecard for subscription businesses; it shows whether you're building a sustainable operation.

Attracts investment and aligns incentives

VCs and investors obsess over ARR because it predicts whether a company survives. Employees understand ARR goals better than abstract metrics; it ties to company viability and bonus structures. When everyone knows 'we need £5 million ARR to hit our funding target', focus aligns.

Enables accurate forecasting

Predictable revenue lets you plan. If you know next month's ARR with 85% certainty (from existing contracts and churn patterns), you can forecast cash flow and budget headcount. This certainty is why subscription businesses command higher valuations than project-based services.

Calculate ARR from MRR

If you know your Monthly Recurring Revenue, multiply by 12. If your MRR is £50,000 and it's stable, your ARR is £600,000. This assumes churn and growth balance out month-to-month, which is true for mature businesses. Fast-growing companies need more careful calculation.

Track ARR movements separately

ARR changes from three sources: new customer acquisition (expansion ARR), upgrades and expansion within existing customers (net revenue retention), and churn (contraction). Tracking each separately shows what's working. You might have great new customer acquisition (£500K expansion ARR) but terrible retention (£300K churn), netting £200K growth. This tells a different story than a single number.

Monitor ARR in relation to CAC payback

Calculate your Customer Acquisition Cost (CAC) payback: months to recover what you spent acquiring a customer. If your CAC is £5,000 and monthly revenue per customer is £1,000, your CAC payback is 5 months. Ideally, payback is under 12 months. If payback is 20+ months, your unit economics are broken.

Project growth scenarios

Model what happens if you change churn, customer acquisition rate, or average deal size. If 5% monthly churn costs you £100K in ARR annually, what investments in retention would pay for themselves? These scenarios guide strategy and spending.

Track predictable yearly revenue from subscriptions to measure business scale and growth trajectory in B2B SaaS and recurring revenue models.

Annual Recurring Revenue (ARR) is the revenue a company expects to receive each year from subscription or recurring contracts. If a customer pays £10,000 per month, their ARR is £120,000. If 100 customers each pay £10,000 monthly, your total ARR is £12 million.

ARR is the primary metric for subscription-based and SaaS businesses because it measures the predictable revenue engine. Unlike one-time transactions, recurring revenue lets you forecast future cash flow, plan headcount, and measure growth. A company growing ARR at 40% year-over-year with net revenue retention above 120% has a healthy business; the same company declining in ARR is in trouble, no matter how many new customers it signs.

ARR differs from Monthly Recurring Revenue (MRR) by timeframe. MRR shows one month's predictable revenue; ARR annualises it (MRR × 12). It also differs from Annual Contract Value (ACV), the total value of a contract divided by its length. A £120,000 three-year contract has an ACV of £40,000. These terms get confused constantly, so be precise about which one you mean.

The trap with ARR is treating it as a single headline number. It actually moves from three places: new business, expansion within existing customers, and churn. Track those separately or you'll celebrate growth that's really just papering over a retention leak.

Examples

Reading your true ARR off the billing system

Say you're running your subscription invoicing through Moneybird. Don't eyeball it. Pull every active recurring invoice, normalise each to its annual value (a £500/month plan counts as £6,000 of ARR, a £6,000 annual plan billed upfront also counts as £6,000), and sum them. That total is your real ARR today, grounded in contracts that are actually live, not a hopeful spreadsheet. The moment a subscription is cancelled in Moneybird, it drops out, so the number self-corrects.

Putting ARR on a dashboard the whole team sees

A single ARR figure hides the story. Say you wire your billing and CRM data into Databox and build one board with three tiles: new ARR, expansion ARR, and churned ARR, each trended monthly. Now when net ARR grows £200K, you can see it was £500K of new business minus £300K of churn, not £200K of healthy growth. That's the difference between knowing you have a retention problem and finding out a year too late.

Forecasting new ARR off the pipeline

Say your new-business deals live in Pipedrive. Tag each open deal with its annualised contract value and weight it by stage probability, and you get a forward view of new ARR landing next quarter. Combine that with your known churn rate from the billing side and you can forecast next quarter's total ARR with real confidence, which is exactly the predictability that lets you plan headcount and commit to a hiring budget without guessing.

Two SaaS companies each acquired £500K in new ARR. Company A had 3% monthly churn; Company B had 10%. After one year, Company A retained £455K of that new ARR. Company B retained only £180K. That 7 percentage point difference in churn rate cost Company B £275K in retained revenue. This gap accelerates over years.