Revenue per visitor, worked out on the back of a napkin

Every operator I know evaluates a new checkout app the same way: what does this do to revenue per visitor? Not conversion on its own, not AOV on its own — the product of the two, because that is the number that has to pay for acquisition. For a store doing $1.50 RPV, a well-placed protection offer with a mid-teens attach rate can move that number 10 to 15 percent without spending another dollar on ads.

That is the claim. Below is the arithmetic.

The RPV formula, and why protection lifts both sides of it

Revenue per visitor is just conversion rate times AOV. A store with 2 percent conversion and a $75 AOV lands at $1.50 RPV, which is roughly the middle of the pack for optimized ecommerce sites — Leadpages' 2024 benchmarking piece puts $1.50 as the average for optimized stores, with best-in-class exceeding it. If you 10x traffic and change nothing else, revenue 10x's. If you lift RPV by 12 percent on the same traffic, revenue moves 12 percent with zero incremental CAC. That is why the operators who obsess over this number tend to be the ones with the healthier P&Ls.

Product protection is one of the few post-cart offers that lifts both sides of the RPV equation at once. On the AOV side, a $10 to $15 plan attached to a $75 order is a direct top-line addition every time the customer opts in. On the conversion side, a well-designed protection prompt does not usually depress checkout completion — and when the plan is framed as an accompaniment to the purchase decision the shopper has already made, it can nudge completion upward on categories where buyer's remorse plays a role. Corso's 2024 write-up on protection-plan ROI puts the AOV lift range at 8 to 20 percent when plans are offered well, and their worked example lands on $15 in incremental revenue per order across 8,000 monthly visitors — about $12,000 a month, all margin, all from a line item that did not exist before.

A worked example on the store from paragraph one

Take the same store: 100,000 visitors a month, 2 percent conversion, $75 AOV. That is 2,000 orders and $150,000 in monthly top-line — $1.50 RPV.

Add a $12 protection plan at a 20 percent attach rate. Two thousand orders means 400 attached plans, or $4,800 in gross plan premium per month. Under a marketing-fee model — where the retailer keeps a share of premium in exchange for placement and traffic — the retailer typically nets somewhere between 50 and 70 percent of that plan revenue after carrier and admin costs. Call it 60 percent for the example: $2,880 a month from that line item alone.

The headline, though, is the AOV lift. Attaching a $12 plan to 20 percent of orders raises blended AOV by $2.40, moving the number from $75 to $77.40 — a 3.2 percent lift. Blend the plan revenue share and the AOV lift together and RPV lands somewhere between $1.60 and $1.65, depending on which slice of premium you keep, versus a $1.50 starting point. That is the 10 to 15 percent lift, and it drops through to gross margin cleanly because there is no marginal CAC attached to any of it.

The math gets more interesting as attach climbs. At 30 percent attach on the same $12 plan — achievable in consumer electronics, outdoor gear, and some furniture categories — you add roughly $3.60 to AOV and net closer to $4,320 in monthly plan revenue. RPV moves toward $1.70 and change.

Three ways this math breaks

The napkin numbers assume you make a few decisions correctly. Get them wrong and the model inverts.

The first failure mode is charging the customer a service fee on top of the plan premium. This inflates the price the shopper sees, cuts attach, and creates a support surface — chargebacks, refund requests, "why did you bill me extra" emails — that quietly eats the margin you booked. If the plan price you show is not the plan price the customer pays, you are optimizing the wrong number.

The second is taking a placement that hurts checkout completion. Modal interruptions, forced-choice interstitials, and pre-checked upsells all pull attach in the short run and depress conversion in the long run. If you win 5 percent more attach and lose 2 percent of conversion on a $75 AOV, the trade is negative in dollars every time. Measure both sides.

The third is picking a partner whose claims experience erodes customer trust. Attach rates on a checkout offer are a function of the store's brand credit with the shopper. If claims get denied for reasons the customer reads as bad-faith, that credit gets spent — and next quarter's attach rate will show it before the support tickets do. A denied-claim rate you would not be comfortable defending in your own inbox is the number to check before you sign anything.

The spreadsheet, in five columns

Copy this into your own sheet, plug in your real numbers, and run it twice — once with conservative assumptions, once with optimistic. Five columns: conversion rate, AOV, attach rate, plan price, retailer take. Multiply through: monthly visitors × conversion × attach × plan price × retailer take gives net monthly plan revenue. Add attach × plan price to the current AOV to get the new blended AOV. Divide new total revenue by visitors and compare to your starting RPV.

Conservative case for the store above: 15 percent attach, $10 plan, 50 percent retailer take. That is about $1,500 a month in net plan revenue plus $1.50 of AOV lift — roughly 4 percent RPV improvement. Optimistic case: 25 percent attach, $14 plan, 65 percent retailer take. About $4,550 in net plan revenue plus $3.50 of AOV lift — 12 to 15 percent RPV improvement.

Two numbers, same underlying store. That range is the honest answer to "what will this do for us." Anyone quoting a single number is either selling you something or has not opened the sheet.

At Flex we build the checkout piece for both sides of this — the pet-prescription savings card and the extended warranty — but the arithmetic above works regardless of who runs the plan. The decision is not really about the vendor; it is about whether you have a category, an AOV, and a customer relationship where a protection offer is a natural accompaniment to the purchase. If you do, the math tends to favor doing it.