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Accounting Retention Rate (Annual) Calculator

Calculate your accounting firm's annual client retention rate using starting, new, and ending client counts.

Your Details

Overview

Use this annual accounting retention rate calculator to estimate the share of clients your firm kept over a year. Enter the active client count at the beginning and end of the year, plus clients acquired during the period, to separate retained clients from new business.

How it works

The calculator removes clients acquired during the year from the ending client count to estimate how many clients from the opening base remained. It then divides retained clients by the starting client count and multiplies by 100. For example, if 170 of 200 opening clients remain, the annual retention rate is 85%. Net client change is shown separately because a growing client base can still have material client losses.

How to use this calculator

  1. 1Enter the number of active clients at the start of the year.
  2. 2Add the number of new clients acquired during the year.
  3. 3Enter the active client count at the end of the year.
  4. 4Review the retention rate, estimated client losses, and net client change.

Example Calculation

Clients at Start of Year

200

New Clients Acquired During Year

40

Clients at End of Year

210

Annual Client Retention Rate

85.0%

The firm retained an estimated 170 clients from its opening base. Its annual retention rate is 85.0%, it lost 30 opening clients, and its total active client base increased by 10.

Frequently asked questions

How do you calculate annual client retention rate?

Subtract new clients acquired during the year from ending clients, divide the result by starting clients, and multiply by 100.

Why are new clients excluded from retention rate?

Retention measures whether clients already on the books stayed with the firm. Including new clients would make retention appear higher than it was.

What is the difference between retention rate and net client growth?

Retention rate focuses on clients from the opening base who stayed. Net client growth compares total clients at year end with total clients at the start, including new clients.

Can the retention rate be above 100%?

A standard client-count retention rate should generally not exceed 100%. A result above 100% may indicate that new, reactivated, or reclassified clients were not recorded consistently.

What counts as an active accounting client?

Use one consistent definition, such as a client with an active engagement or recurring service relationship. Apply the same definition to both the start and end counts.

Does this calculator measure revenue retention?

No. It measures retention by client count. Revenue retention requires client revenue data and is calculated differently.

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Assumptions and warnings

Assumptions

  • The start and end client counts use the same definition of an active client.
  • New clients acquired during the year are excluded from the retained-client count.
  • The measurement period is one full year and client records are complete.
  • Results are operational estimates and do not measure client revenue, profitability, or engagement.

Warnings

  • This calculator provides a business performance estimate only and should be interpreted alongside your client records and retention policies.
Accounting Retention Rate (Annual) Calculator