# Pricing ambiguity at selection — dev spec
Site: hostinger.com · Priority 8 · High · Effort: Medium (2-5 days)

## Problem
Promotional monthly prices are shown without upfront total or renewal rates, creating ambiguity and risk at plan selection.

## Evidence (from the live site)
> Prices shown on the page: $11.99 $2.99/moChoose $143.52 $575.52 $10.99/mo $18.99

## Current state
cta: Choose; notes: Pricing cards show $2.99/mo but total upfront cost ($143.52) and renewal ($10.99/mo) are not clearly displayed.

## Required change
cta: Choose; notes: Display total upfront cost and renewal rate next to promotional monthly price.

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Display total upfront cost and renewal rate next to promotional monthly price.
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_pricing_ambiguity_at_selection` on interaction with the changed element
- Verify the event fires in BOTH variants before opening traffic

## Test plan
- Two-proportion z-test, 95% significance, 80% power
- 315,206 visitors per variant to detect a 5.0% relative lift
- Run at least one full business cycle; duration depends on traffic

## Rollback
Feature-flag the change; revert if the primary metric drops for 3 consecutive days.