Looking for a different APF? This entry covers average purchase frequency, the ecommerce retention metric. APF is also an abbreviation used in banking and real estate finance, and the name of several unrelated organizations — none of which are covered here.

Average Purchase Frequency (APF) is the number of times an average customer makes a purchase from a brand within a defined time period — usually a year. It's one of the three components of Customer Lifetime Value (along with average order value and customer lifespan), and a powerful indicator of how habit-forming a brand has become.

How APF is calculated

APF = total number of orders ÷ number of unique customers, measured over the same time window. A store that processed 15,000 orders from 5,000 unique customers over a year has an APF of 3.0 — the average customer made three purchases that year.

Why APF matters

APF is the multiplier on AOV when calculating annual revenue per customer. A brand can have a healthy AOV but low APF (one big purchase per year) or a low AOV but high APF (small frequent purchases). Both can be profitable, but they imply very different retention strategies, lifecycle marketing investments, and product roadmaps.

Rising APF is one of the cleanest signals of strengthening brand affinity — customers buying more often, voluntarily, without needing acquisition cost reapplied each time.

What counts as a good APF

Highly category-dependent:

Consumables (beauty, supplements, food, pet, household goods): 4–8x annually is typical for established brands. Subscription business models can push past 10x.
Apparel and accessories: 2–4x annually for active brands, 1–2x for occasion-driven categories.
Furniture, electronics, durable goods: 0.3–1x annually; the relationship is built over years rather than months.
Gifts and one-time-use: often below 1x; the lifetime value comes from referrals more than repeat purchase.

What a poor APF tells you

Weak post-purchase activation: one-and-done customers usually signal that the post-purchase email and SMS flows aren't moving customers toward a second purchase.
Wrong-channel acquisition: some channels reliably bring in lower-frequency customers (deal sites, broad-audience paid social). APF segmented by acquisition channel reveals which channels are buying customers who actually return.
Product mix gaps: if the catalog only has high-consideration hero products and no follow-up SKUs, customers have nothing to come back for.
Replenishment friction: consumables that should be reorder candidates aren't, because the product page doesn't surface restock prompts and email isn't reminding the customer at the right time.

How to improve APF

Build accessory and replenishment SKUs around hero products. The second purchase is usually easier to design for than the first — most customers who liked the hero product will buy a complementary SKU if presented at the right moment.
Time post-purchase email and SMS to actual usage cycles. A 30-day reorder reminder for a 60-day product is too early; one for a 14-day product is too late.
Use loyalty programs that reward frequency, not just total spend. Programs that recognize the second and third purchase explicitly drive higher APF than tier-based programs that only kick in at high spend levels.
Identify customers buying at higher frequency and over-invest in them. The top APF cohort often has 5–10x the LTV of the average — they warrant more attention than the marketing team's default split usually gives them.

Frequency responds to retention investment more reliably than average order value or customer lifespan do, which is why it usually deserves attention first — the reasoning behind customer retention and loyalty programs and the Shopify loyalty program work that supports them.

The loyalty-program advice above — reward frequency, not just total spend — only works if the program’s structure actually matches that goal, and not every loyalty program type does. This overview of Shopify loyalty program types breaks down which structures reward repeat purchases specifically versus which ones just reward big spenders.