What one blended LTV number conceals
How acquisition source, plan term, market and cohort age can turn a tidy average into a poor spending limit.
A blended lifetime value can be useful for a high-level forecast. It is a weak acquisition limit when the customers being purchased differ from the customers that dominate the historical average.
Mix shifts change the average
Suppose organic customers represent most mature history and paid-social customers represent most recent growth. The aggregate LTV borrows the long retention of the former and assigns it to the latter. The problem is not averaging itself; it is using an average from one mix to price another.
Annual and monthly subscriptions create a similar distortion. Upfront annual receipts lift early revenue, while monthly plans reveal churn sooner. Combining them can make both payback timing and renewal risk harder to read.
Segment with restraint
Start with distinctions that map to a real decision: acquisition channel, product, plan term or market. Do not cross every dimension until each cell contains a handful of customers. Sparse cohorts produce dramatic lines and fragile conclusions.
Compare segments at the same age and state whether values are gross receipts, net proceeds or contribution after variable costs.
Prefer a range with a label
A useful output might state that observed 180-day net revenue for one channel lies between £42 and £49 per acquired payer across mature cohorts. A projected lifetime range can follow, with the retention tail identified as an assumption.
The extra words are not a failure of communication. They tell the budget owner which customers, value definition and evidence window the number actually represents.