ARPA vs ACV: Which Average Revenue Number to Use

What Is the Difference Between ARPA and ACV?

ARPA is the average recurring revenue per account across your installed base, and ACV is the annualized recurring value of a contract you signed. ARPA looks at customers you already have. ACV looks at deals as they close.

The distinction matters because the two answer different questions. When someone asks how much a customer is worth to us, they want ARPA. When someone asks how big the deals are that we are selling, they want ACV. Report one in place of the other and you get planning built on the wrong base.

The numbers also move on different clocks. ARPA drifts up slowly as customers add seats and products, and drops when a large account leaves. ACV changes with pricing, packaging, and segment mix, and it can shift in a single quarter when the sales motion moves upmarket or down.

How Do You Calculate Each One?

ARPA divides recurring revenue by active accounts, and ACV divides the recurring portion of a contract by its term in years. Both formulas are simple, and both go wrong in the denominator.

For ARPA, monthly ARPA equals MRR divided by active accounts, and annual ARPA equals ARR divided by active accounts. The judgment call is what counts as an account. A parent company with six subsidiaries on separate contracts can be one account or six, and the two versions of ARPA differ by 6x. Free accounts, trials, and paused subscriptions have to be decided once and held constant, because changing the rule mid-year makes a trend line that describes nothing.

For ACV, take total contract value, subtract one-time fees, then divide by the number of years in the term. A $360,000 three-year subscription with $60,000 of implementation is $120,000 of ACV. The trap here is one-time revenue. Leave services inside ACV and you inflate the number that feeds your capacity model.

How Do ARPA and ACV Compare Side by Side?

ARPA describes the base and is moved by expansion and churn, while ACV describes contracts and is moved by pricing and segment mix. The differences that matter for planning line up in one view.

Why Does New-Business ACV Drift Away From ARPA?

Expansion lifts ARPA above the level new customers sign at, so a healthy company usually shows ARPA above new-business ACV. A customer who started at $40,000 and grew to $95,000 over four years pulls the base average up, while every new logo enters at whatever your current packaging sells for.

Segment mix pushes the other way. A team that adds a mid-market motion drops new-business ACV fast, and ARPA follows years later as those smaller accounts accumulate. Neither movement is a problem on its own. The problem is reading a rising ARPA as proof that deals are getting bigger when new-business ACV has been falling for three quarters.

There is a third gap worth watching, and it is the one that breaks forecasts. Pipeline ACV and closed-won ACV are not the same number. The gap can be large. A pipeline carrying an average deal size of $80,000 against $40,000 average closed-won deals is forecasting every deal at roughly double what it will actually sign for, which is why pipeline coverage calculated on inflated ACV feels safe right up to the day the quarter closes.

Which Metric Should Targets Be Built On?

Build quota, capacity, and pipeline targets on new-business closed-won ACV, and use ARPA for decisions about the base. The rep signs a contract, so the deal-level number governs their plan.

Capacity math makes this concrete. If a rep is carrying $1.2 million in new ACV quota and closed-won ACV runs at $40,000, that is 30 deals a year. Substitute an ARPA of $70,000 and the same quota looks like 17 deals, so you plan for roughly half the deal volume and half the pipeline the team actually needs. The same error travels into pipeline targets, since coverage is computed against a goal in the same currency as the deals inside it.

ARPA earns its place elsewhere. It sets customer success coverage ratios, it anchors pricing and packaging analysis, and it tells you whether the base is expanding without needing a full net revenue retention build. Split ARPA by cohort year and it becomes a pricing history of your own company.

How Do the Two Show Up in a Revenue Forecast?

ACV drives the new-business line and ARPA drives the base line, and a forecast that uses one number for both will miss on mix. New revenue is deals times ACV. Base revenue is accounts times ARPA, adjusted for expansion and churn.

Keeping them separate is what makes a miss readable. A quarter can come in short because fewer deals closed, because the deals that closed were smaller, or because the base contracted. One blended average hides all three. Two lines, each with its own driver, put the cause on the page. That structure is the backbone of a revenue forecast that survives a board question about why the number moved.