Agency client churn calculator
See how monthly churn compounds to annual revenue impact. Calculate client lifetime, CLV, CLV:CAC ratio, and how much revenue walks out the door each year.
Client Base
Churn & Economics
This calculator treats up to 3% a month as healthy
Churn Impact
Annual Churn Rate
30.6%
Healthy
Clients lost/mo
1.2
Revenue lost/mo
$5,400
CLV : CAC rule of thumb: 3:1 is a common target, borrowed from SaaS. Well below it, acquisition cost eats most of what a client is worth. Far above it, you may be under-spending on growth.
How the churn calculator works
- Annual churn = 1 - (1 - monthly churn)12. Monthly churn compounds, so 3% a month is 30.6% a year, not 36%.
- Average client lifetime = 1 / monthly churn, in months, capped at 120 months (10 years) so very low or zero churn does not produce an unlimited value.
- CLV = lifetime x monthly revenue per client x gross margin %. This is gross profit per client, not revenue, and it is the same definition the client lifetime value calculator uses.
- CLV:CAC = CLV / acquisition cost.
- Revenue lost per year = clients x monthly revenue x 12 x annual churn.
Worked example
With the defaults: 40 clients, 3% monthly churn, $4,500 a month per client, 55% gross margin and $2,500 to win a client. Annual churn is 30.6%. Average lifetime is 33.3 months. CLV is 33.3 x $4,500 x 55% = $82,500, and CLV:CAC is 33.0. You lose 1.2 clients and $5,400 of monthly revenue each month, about $661,300 of annual revenue a year that new sales must replace before the agency grows.
How to read the result
The status label (Best-in-class up to 1% a month, Healthy up to 3%, Watch Closely up to 5%, Critical above 5%) is this calculator's own scale, not a published benchmark. For an outside reference, Focus Digital's 2026 agency churn report puts average monthly churn at 1.6% for retainer agencies, 2.5% for hybrid agencies, 3.1% for performance-based agencies and 4.2% for project-based agencies. The report does not publish its sample size, so compare against your own trailing average first. The revenue lost figure matters more: compare it with the new revenue your sales pipeline realistically brings in each year.
How to use this calculator
Enter your current client count and average monthly revenue per client. For churn, use the trailing 6-12 month average, not last month. Single-month churn is noisy; the rolling average tells the story.
Gross margin per client should be what you keep after direct delivery cost but before overhead. Take it from your accounts rather than guessing. Acquisition cost is total sales and marketing spend over a period, divided by number of new clients acquired in that period.
The output shows annual churn (which compounds, so it's always higher than 12x monthly), average client lifetime, CLV, CLV:CAC ratio, and annualized revenue lost to churn. The last number is usually the wake-up call.
Key insights
- Churn compounds. 3% monthly is about 31% annually, not 36%, because each month's churn applies to a smaller client base.
- CLV:CAC tells the growth story. A low ratio means acquisition costs eat most of what a client is worth. A very high one can mean you are under-spending on growth.
- Retention compounds too. Cutting churn from 5% to 3% a month lifts average lifetime from 20 to 33.3 months and CLV by two-thirds, with no extra sales.
- Watch concentration. Average churn hides risk when one client is 30% of revenue. Model your top 3 clients leaving separately.
Frequently asked questions
What is a healthy churn rate for an agency?
It depends on your model: retainer agencies should expect lower churn than project shops, where clients leave when the project ends. This calculator labels up to 1% a month as best-in-class, up to 3% healthy, up to 5% watch closely and above 5% critical; treat that as a working scale, not a published benchmark. For comparison, Focus Digital's 2026 agency churn report puts average monthly churn at 1.6% (18% a year) for retainer agencies, 2.5% for hybrid agencies and 4.2% (42% a year) for project-based agencies. Remember that 3% a month compounds to about 31% a year.
How do I calculate client lifetime value?
CLV = average client lifetime (months) x average monthly revenue per client x gross margin %. Average lifetime is 1 / monthly churn rate, so 3% monthly churn gives 33.3 months. At $4,500 monthly revenue and a 55% gross margin, CLV is 33.3 x $4,500 x 0.55 = $82,500.
What is a good CLV:CAC ratio?
3:1 is a common rule of thumb, borrowed from SaaS, and this calculator already uses gross-profit CLV, which is the usual basis for it. Well below 3:1 means acquisition costs eat most of what a client is worth. A very high ratio can mean you could spend more on sales and marketing and still be profitable.
Why does small monthly churn add up so fast?
Because it compounds. At 3% a month, about 31% of clients leave in a year. On a 40-client roster that is roughly 12 clients to replace just to stay even. If each client pays $54,000 a year, about $661,000 of revenue has to come from new sales before you grow at all.
How do I reduce agency churn?
Run a structured onboarding, hold quarterly business reviews to catch problems early, keep the same account manager where you can, review scope before renewal, and send regular reporting that shows results. When a client leaves, ask why and log the reason so patterns show up.
Catch churn signals before they leave
AgencyPro gives every client a portal for requests, files and messages. On Pro, client ratings show who is unhappy before renewal comes round.