HELLO → DEMO
Churn Cost Calculator
Annual recurring revenue$20,000,000
Annual gross revenue churn10%
Avg contract value (annual)$50,000
HELLO → DEMO
Churn Cost Calculator
Most teams track new bookings to the dollar and round churn to a shrug. But gross revenue churn, the share of existing recurring revenue that walks out each year, is a hard number with a hard price. It does not need a new deal, a new rep, or a new campaign. It only needs to stop leaving.
One boundary: this page measures gross churn, the revenue that leaves, before any expansion or upsell papering over it. Net revenue retention can read healthy while the bucket leaks underneath. Gross is the honest number, and it is the one this page prices.
Churn is not a one-year event. The revenue that leaves this year would have renewed next year, and the year after that. Hold churn flat for three years and each year's leak stacks on the last: year one's lost customers stop paying for three years, year two's for two, year three's for one.
For context: the 2025 private B2B SaaS median gross revenue retention is 88 percent, meaning the median company loses 12 percent of its recurring revenue every year, and that median has slipped from 90 percent over three years (Benchmarkit 2025). Net revenue retention sits at a median of 101 percent, which means at the midpoint of the market, expansion barely covers the leak.
Every churned dollar has to be replaced through acquisition before growth even starts, and acquisition is the most expensive way to create a dollar of revenue. The leak does not just shrink the base. It taxes the engine that was supposed to grow it.
The 2025 median New CAC Ratio is $2.00 of sales and marketing spend to acquire $1.00 of new customer annual recurring revenue, up 14 percent in 2024, with the bottom quartile spending $2.82 (Benchmarkit 2025). Replacing churned revenue at market-median efficiency costs twice the revenue it restores. If you know your own CAC ratio, set it below.
Growth gets the board slide. Retention decides whether the slide compounds. This is the read on the base everything else is built on.
Watertight
Your base holds. The question shifts from plugging the leak to whether the pipeline system on top of it can compound what retention protects.
Churn is not a customer success problem alone. It starts upstream: deals closed outside the ideal profile, expectations set in the pitch that the product never meets, handoffs where the promise gets lost. Those are system problems, the matrix that defines who you serve, the process that carries a deal, the definitions everyone scores against, and systems can be installed.
A 25% reduction is relative, not absolute: a 10% churn rate becomes 7.5%, not 0%. The retained revenue is doubly cheap, because every dollar that stays is a dollar you do not buy back at the market's $2.00 acquisition price. The fix is upstream of the renewal date, so the spend stays flat. The leak does not.
$500,000 stays on the book every year, $3,000,000 over three years, and $1,000,000 in replacement acquisition spend never has to be spent. Gross retention rises from 90% to 92.5%.
Growth fills the bucket. Retention is the bucket.
Get the full breakdown
Your numbers, the elite benchmarks they were graded against, and the one move that changes them. No spam. Unsubscribe anytime.
Straight answers to what people ask before they run the numbers.
Churn costs you the lost annual recurring revenue plus the roughly $2 it takes to replace every $1 of it through new acquisition. The median new-customer CAC ratio is $2.00 of sales and marketing spend per $1 of new ARR (Benchmarkit 2025). That replacement multiple is why retention is usually the cheapest revenue you will book this year.
Elite gross revenue retention is 92% or higher, against a market median near 88% that has slipped from 90% over three years (Benchmarkit 2025; SaaS Capital 2025). Gross retention caps your growth, because no amount of new sales outruns a leaky base.
Net revenue retention measures how much recurring revenue your existing customers generate year over year, including expansion. Elite is 120% or higher versus a median near 101% (Benchmarkit 2025), meaning the best companies grow even with zero new logos.
Keeping one is far cheaper, because replacing churned revenue costs roughly twice what the revenue was worth. Retention compounds. Acquisition resets the meter every quarter.