# Monthly Installment as the Headline Price A/B Test

Page: https://alidemirbas.com.tr/en/lab/ab-test-library/tests/monthly-installment-as-the-headline-price-ab-test

## Hypothesis

If the monthly installment becomes the headline price on the product page while the total stays clearly visible beside it, a higher-priced item may feel easier to fit into a monthly budget. With the monthly amount up front, revenue per visitor (RPV) could rise, though shoppers who mistake the installment for the full cost could cancel or complain and offset the gain.

## When to run this test

On higher-priced product pages, shoppers who look at the price and leave without adding to cart, surveys saying the price feels out of budget, or installments that are available but rarely chosen make the monthly framing worth testing. If the emphasis works, installment selection and purchases rise while cancellations, returns and price-related support contacts do not. If installments go unused because of a checkout issue or eligibility rules, look into that first. Do not go live until every installment count shown is actually available for that product and any financing cost appears next to the monthly amount.

## Primary metric

**Revenue per visitor (RPV)**: Use revenue per visitor as the primary metric, even if highlighting installments increases conversion.

## Other metrics

- **Purchase conversion rate (CR)**: Read purchase rate alongside revenue per visitor.
- **Installment selection rate**: Measure whether shoppers actually choose installments.
- **Cancellation and return rate**: Track both over the same follow-up period.
- **Price transparency contacts**: Track whether price-related support contacts increase.

## What to check before and during the test

- **Hierarchy**: Compare total price as the main price with installment amount as the most prominent price detail.
- **Total cost**: Show the total payable clearly next to the installment amount.
- **Financing**: Keep installment count, eligibility, fees and defaults unchanged.
- **Price bands**: Review predefined price bands relevant to the catalog; do not invent a universal threshold.
- **Device**: Check the presentation on desktop and mobile.

## What to watch when reading the result

- The deciding metric here is revenue per visitor. If conversion rises while RPV stays flat or falls, the emphasis may be bringing more orders without adding revenue; if cancellations, returns or price transparency contacts rise, do not call it a success.
- Break the result down by the predefined price bands and by device. If the installment table pushes the CTA down on mobile, the gap may come from layout rather than emphasis. Compare cancellations and returns once orders in both arms have finished the follow-up period.
- Order values vary widely between visitors, so small differences in revenue per visitor can stay unclear for a long time. Enter the current conversion rate and the relative lift you care about in the [sample size calculator](https://alidemirbas.com.tr/en/calculators/sample-size-calculator), then divide the sample it gives per variant by daily traffic per arm to size the run. The calculator works with rates and RPV usually needs more visitors, so do not mistake a gap too small to measure for no effect.

## Frequently Asked Questions

### How should the total appear when monthly installments are emphasized?

Keep the full amount clearly visible beside the installment figure. Disclose applicable finance charges and only show genuinely available terms.

### Does increased conversion make installment emphasis a winner?

Use revenue per visitor as the primary outcome. Monitor cancellations, returns and predefined price bands. Installment selection helps explain usage rather than replace the revenue outcome.