SaaS Metrics

ARPA (Average Revenue Per Account)

ARPA (SaaS) measures average revenue per paying account/customer in a period. In B2B SaaS, ARPA often matches pricing better than ARPU.

Written by MetricKit EditorialReviewed by MetricKit Editorial ReviewUpdated 2026-02-22
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Definition

ARPA (SaaS) measures average revenue per paying account/customer in a period. In B2B SaaS, ARPA often matches pricing better than ARPU.

Formula

ARPA = revenue / average paying accounts

Example

If revenue is $120k in a month and you have 60 average paying accounts, ARPA is $2,000 per account.

How to use it

  • Use ARPA when you bill per company account (not per seat).
  • Segment ARPA by plan, industry, and channel to understand monetization.
  • Pair ARPA with CAC payback and LTV for unit economics.

Common mistakes

  • Including free or trial accounts in the denominator without labeling.
  • Mixing gross revenue with net revenue across periods.
  • Comparing ARPA across segments without controlling for pricing or mix shifts.

Measured as

ARPA = revenue / average paying accounts

Misused when

  • Including free or trial accounts in the denominator without labeling.
  • Mixing gross revenue with net revenue across periods.
  • Comparing ARPA across segments without controlling for pricing or mix shifts.

Operator takeaway

  • Use ARPA when you bill per company account (not per seat).
  • Segment ARPA by plan, industry, and channel to understand monetization.
  • Pair ARPA with CAC payback and LTV for unit economics.
  • Keep ARPA (Average Revenue Per Account) consistent by cohort, segment, and period before you use it as a decision signal in planning or reporting.
  • Interpret the metric alongside retention, margin, or payback so one ratio does not hide the real operating trade-off.

Next decision

  • Quantify the impact with ARPA Calculator if you need to turn the definition into an operating assumption.
  • Read ARPA: how to calculate Average Revenue Per Account (formula + examples) if the decision depends on interpretation, policy, or trade-offs beyond the raw formula.

Where to use this on MetricKit

Calculators

  • ARPA Calculator: Calculate Average Revenue Per Account (ARPA) for SaaS businesses and understand the ARPA formula.
  • ARPU Calculator: Calculate Average Revenue Per User (ARPU) for a period and understand the ARPU formula.
  • CAC Payback Period Calculator: Estimate how many months it takes to recover CAC (months to recover CAC) using gross profit.
  • LTV Calculator: Estimate customer Lifetime Value (LTV) using ARPA, gross margin, and churn rate.
  • LTV Sensitivity Calculator: See how gross profit LTV changes as churn and gross margin vary (simple 3x3 sensitivity).

Guides