"Email sales" counted two ways for the last ~6 months. They differ because they attribute differently.
5,012Klaviyo-attributed email orders
€301,599Klaviyo-attributed email revenue
1,297Last-click email orders (Shopify)
€85,591Last-click email revenue
Why the two differ (~3.9×). Klaviyo credits any order placed within its conversion window after an email open/click — including buyers who return later as "direct" (70% of all orders carry no UTM). Shopify's last-click only credits orders whose final click was the email. Klaviyo's ~5,012 / €301,599 matches your dashboard; the last-click set is a clean subset (~26%) used to derive the per-customer tenure splits below.
Each month's email buyers — how long they'd been customers
The clearest view: for every month, take everyone who bought through a Klaviyo email that month, and split them by when they first became a customer. "New this month" first purchased in that same month; "1 mo before" first purchased the previous month; and so on.
December 2025
39%11%11%14%11%11%
28
January 2026
82%
180
February 2026
67%9%
143
March 2026
55%13%18%
146
April 2026
55%11%15%9%
218
May 2026
48%11%14%9%9%
301
June 2026
50%17%9%9%
268
July 2026 (partial)
38%13%18%11%13%
55
New this month1 mo before2 mo before3 mo before4 mo before5 mo before6+ mo before
Email buyers in…
Buyers
New this month
1 mo before
2 mo before
3 mo before
4 mo before
5 mo before
6+ mo before
December 2025
28
39%
4%
11%
11%
14%
11%
11%
January 2026
180
82%
2%
3%
2%
4%
3%
5%
February 2026
143
67%
9%
6%
4%
4%
3%
6%
March 2026
146
55%
13%
18%
3%
2%
0%
8%
April 2026
218
55%
11%
15%
7%
1%
2%
9%
May 2026
301
48%
11%
14%
9%
9%
3%
7%
June 2026
268
50%
6%
17%
6%
9%
3%
9%
July 2026 (partial)
55
38%
4%
13%
18%
11%
4%
13%
Read it like this — take June: of 268 people who bought from an email in June, 50% were brand-new customers that month, and the other 50% had first bought in an earlier month (17% one month earlier, and so on). The pattern across the year is the headline: brand-new buyers fell from 82% in January to around 50% by June — so email is steadily doing more of its work re-engaging customers you already had, rather than only catching first-timers. (December and July have low email volume, so treat those two rows as indicative.)
Revenue by buyer tenure, per 30-day window
For each of the last six 30-day windows, how the email revenue splits by how long ago the buyer first became a customer. Euro figures are Klaviyo's attributed revenue for that window, split using the last-click sample's tenure mix — so each row's bands sum to that window's real attributed total.
0–30 days (most recent)
50%14%14%
€52,263
30–60 days
51%13%12%10%
€60,812
60–90 days
56%12%14%11%
€59,390
90–120 days
55%18%16%
€42,482
120–150 days
72%9%
€36,493
150–180 days
82%
€48,182
New (0–30d)30–60d60–90d90–120d120–150d150–180d180d+
Window
New (0–30d)
30–60d
60–90d
90–120d
120–150d
150–180d
180d+
Total
0–30 days (most recent)
€26,011
€7,282
€7,530
€2,904
€3,245
€1,645
€3,647
€52,263
30–60 days
€31,225
€8,144
€7,047
€6,385
€2,884
€1,065
€4,062
€60,812
60–90 days
€32,982
€6,855
€8,134
€2,799
€812
€1,124
€6,685
€59,390
90–120 days
€23,374
€7,700
€6,937
€333
€657
€252
€3,229
€42,482
120–150 days
€26,199
€3,154
€2,024
€2,768
€455
€258
€1,634
€36,493
150–180 days
€39,501
€914
€2,030
€767
€1,165
€1,918
€1,886
€48,182
About half of email revenue now comes from returning customers — and rising. In the most recent 30 days, new buyers (first purchase ≤30 days) drove 50% of email revenue and existing customers the other 50%. Six months ago new buyers were ~82%. As the base matures, email is shifting from first-purchase acquisition to monetising customers who first bought 1–6 months earlier — the €21,143 tagged "180d+" across the period is revenue from customers older than six months, and that slice will keep growing.
Reactivation: gap since previous order
The same email buyers, grouped by how long they'd been dormant before this purchase (% of orders per window).
Email is a reorder engine. Roughly half of email buyers each window are repeat customers, most reactivated after 1–3 months dormant. Deep-dormant (6 months+) wins are still small — because the base is young — but that pool is the natural next target for a dedicated win-back flow.
After how many months do people stop buying?
Across all channels (the true buying behaviour): of customers who had the chance, the share who placed any order in each month after their first purchase. Month 0 is the first order (100% by definition).
Most buying stops early — and email's job is to slow that. Only 22% of customers who are at least 3 months old have ever placed a second order (4,666 of 21,327); about 78% remain one-time buyers. Among those who do come back, repeat activity is highest in month 1 (~7%) and falls by roughly half by month 3–4, settling to a low steady ~2–3%/month from month 5 onward. In practice, the window to convert a buyer into a repeat customer is the first 60–90 days; after ~4–5 months, unaided repeat buying is minimal, which is exactly where a replenishment/win-back email flow earns its keep. (Months 10+ have few eligible customers, since the store scaled from December, so treat the tail as indicative.)