How a $5 Voucher Increase and a Smart Purchase Hurdle Lifted Average Transaction Value by 70%

The Setup

A national retailer with over 300 stores and a loyalty database of approximately 300,000 members runs regular voucher campaigns. For five years, the format was consistent: a $20 voucher emailed to loyalty members, redeemable on any product in-store, no minimum spend required.

It worked. Customers came in, redeemed the voucher, and the average transaction value hovered around $95–$100.

But the brand wanted more. Not more customers necessarily, but more value per visit.

Two Simple Changes

In late 2024, the team made two adjustments to their voucher campaign:

1. Increased the voucher value from $20 to $25. The first increase in five years, partly driven by inflationary and cost-of-living pressures. A small gesture of added value to the customer.

2. Introduced a $100 minimum purchase hurdle. To redeem the $25 discount, customers now needed to spend at least $100.

That’s it. No new creative. No new channels. No change to the loyalty program mechanics. Just two variables adjusted.

The Result

Average transaction value jumped from approximately $100 to $168, a roughly 70% increase.

Let that sink in. A $5 increase in voucher value, paired with a spending floor, nearly doubled the revenue per transaction for campaign-driven visits.

Why It Worked

The Anchor Effect

The $100 hurdle set a psychological anchor. Without a minimum, customers optimised for “get in, use the voucher, get out.” The average spend naturally clustered just above the voucher value. With the hurdle, the anchor shifted. Customers now thought in terms of “I need to spend $100 to get my $25 off,” and then often exceeded it.

The $168 average tells us that most customers didn’t just clear the $100 bar. They overshot it significantly, likely because once you’ve committed to a $100 basket, the marginal cost of adding another item feels small.

Perceived Generosity

Bumping the voucher from $20 to $25 was a smart move in context. After five years of inflation, $20 felt smaller than it used to. The $25 figure restored the perception of meaningful value, especially for a loyalty program where members expect to feel rewarded.

At $25 off $100, the effective discount is 25%. That’s a compelling number. At $20 off $95 (the previous average), the effective discount was about 21%. The customer perception of the deal improved even though the retailer’s margin likely improved too, thanks to the higher basket size.

Reduced Voucher Waste

Under the old model, some customers were using the $20 voucher on transactions as low as $25–$30. The brand was effectively giving away product. The $100 hurdle eliminated these low-value redemptions entirely, ensuring every voucher activation was attached to a meaningful transaction.

The Dual Campaign Model

This voucher strategy was part of a broader campaign with two components:

Retention (the voucher): Sent to the existing 300,000-member loyalty database via email and SMS. This drove the bulk of sales, which makes sense given the size of the existing customer base.

Acquisition (paid social): Meta ads drove traffic to a landing page where new customers could sign up for the loyalty program and receive the voucher. Previous campaigns typically generated 900–1,000 new signups. By extending the campaign window from three weeks to four, the brand targeted 1,400 new members.

The acquisition arm feeds the retention arm. Every new signup becomes a future voucher recipient, compounding the value of the loyalty database over time.

Lessons for Other Brands

1. Don’t Be Afraid of Purchase Hurdles

Brands often worry that adding a minimum spend will suppress redemptions. That can happen if the hurdle is set too high relative to the typical basket. But if the hurdle is within reach of what customers already spend (or slightly above it), it tends to pull spend upward rather than push customers away.

2. Small Voucher Increases Can Have Outsized Impact

The move from $20 to $25 cost the brand an extra $5 per redemption but generated an incremental $68 in average transaction value. Even accounting for product margins, that’s an extremely favourable trade.

3. Review Your Promotions Regularly

Five years is a long time to run the same promo mechanics. Customer behaviour shifts, inflation erodes perceived value, and competitors adjust their offers. Regular review, even of campaigns that are “working fine,” can uncover easy wins.

4. Measure the Full Picture

Transaction value alone doesn’t tell the whole story. This brand also tracks redemption rates, new signups, and the downstream value of acquired customers. Marketing mix modelling allows them to see how the campaign interacts with their other media channels and measure true incremental impact.

The Bottom Line

You don’t always need a radical overhaul to move the needle. Sometimes the biggest gains come from small, data-informed adjustments to mechanics you already have in place. A $5 change and a simple spending floor turned a reliable but unremarkable campaign into a significantly more profitable one.

The question worth asking: what simple change in your current promotions could be leaving money on the table?

Seeda helps brands measure the true incremental impact of campaigns and promotions through marketing mix modelling. Learn more about how we can help you optimise what’s already working.