Datasheet · Cohort Payback report

How to read Cohort payback

Every month we pay to win a group of new clients. This report tracks how fast each group pays that money back — and what's left over. Scan this page once and the report should never need explaining again.

The idea

One row = one group of clients, running a race

Everyone who became a client in the same month is a cohort. We pay for them once, up front. Then they pay us back a bit each month. The report watches the race between those two numbers.

Month 0
−£77
what we paid to win each client (ads + call team)
M1
£37
earned back so far, per client
M2
£61
still behind — cell stays blue
M3
£75
nearly there…
M4
£88 ✓
money back — cells turn green
M5+
margin
everything from here is money we keep
The numbers above are the real March 2026 cohort — 168 clients who cost £76.94 each and had it paid back inside four months.
The race, drawn

Blue means still paying it back. Green means it's back.

Each bar is the running total one client has earned back. The dashed line is what that client cost. The month the bar clears the line, the row turns green — that's the whole visual language of the report.

CAC £77 — the finish line
£37
M1
£61
M2
£75
M3
£88 ✓
M4
£93
M5
still recovering the cost cost recovered — now margin CAC — what a client cost
The columns

What each column is telling you

Left to right, the same story every time: what they cost, how the payback is going, and where it will probably end up.

£76.94CAC

CAC

What one client cost to win that month. The finish line for the whole row.

£61.49M2

M1, M2, M3…

Running total earned back per client. It accumulates — M2 includes M1. Blue until it crosses CAC.

£92.73@M5

Latest

Where the total stands today, and how old the cohort is. Keeps working after a cohort outgrows the M1–M6 window.

120%% of CAC

% of CAC

How much of the cost is back. 100% = break even. Anything above is margin.

+£15.06per client

Margin / client

£ beyond (green) or still short of (red) the cost, per client, so far.

+£2,653whole cohort

Cohort margin

The same thing × every client in the group. The money number.

M4payback

Payback

The month the money came back. "accruing" = hasn't crossed yet — normal for young cohorts.

£126£122 – £133

Proj. M12

Where the row will likely be at one year old, with a likely range. Explained below.

Where CAC comes from

Two costs, one number

Winning a client takes ad money and people's time on placement calls. CAC is both, split across everyone who became a client that month.

£7,285
Google Ads spend that month
+
£5,640
placement team shifts that month
÷
168
new clients won that month
=
£76.94
CAC per client
Deliberately excluded: the team's support and training shifts (they fund the whole operation, not client-winning). And because team cost data starts March 2026, that's where the report's rows start.
The projection — and that range

"Why does it say +£701 – +£20,387?"

We don't guess the future. We look at the 2025 cohorts that have already lived a full year, measure how much they grew from each age to month 12, and apply that same growth to today's cohorts.

£33.62
June cohort's total at its last complete month (M1)
×
×3.6
how much 2025 cohorts typically grew from M1 to M12
=
~£120
likely value at M12, per client

The small range under each projection is simply the smallest and biggest growth actually seen among those 2025 cohorts. A one-month-old cohort could still go lots of ways, so its range is wide. It narrows by itself every month.

June — projected at 1 month old

£120
£90£183

Wide range → the +£701 to +£20,387 cohort margin. Not a broken number — honest uncertainty about a young cohort.

March — projected at 5 months old

£126
£122£133

Five months of real data → a tight range. Come back in two months and June's will look like this.

One quiet bias worth knowing: the 2025 cohorts didn't have 2×2 subscriptions. If subscriptions keep clients paying longer, real results should land above these projections — they lean conservative on purpose.
Honest limits

Three things to hold while reading

The newest month is always still filling

Every row's last cell is the current month, part-way through. It rises until month end — don't read it as final.

"Margin" is not company profit

It's money back beyond the cost of winning the client. Overheads, support shifts and everything else sit outside it.

The numbers reconcile

The same cohort figures appear in the Cohort LTV and New clients reports — checked to the penny, same source underneath.