Secret Order Bump: How Mundpay Built an Exclusive Feature to Increase Average Order Value

What Is the Secret Order Bump?

An order bump is a complementary offer the buyer accepts with one click inside the checkout, without leaving the page. So far, nothing new, almost every gateway has one. What Mundpay changed was the when.

In the conventional order bump, the offer appears before payment, while the buyer is still filling in their details and still deciding whether to buy. In the Secret Order Bump, it appears after the card details are filled in, at the point where the purchase decision has already been made in the buyer's mind.

That is the entire innovation, and it is subtle enough to look obvious once explained. It was developed in-house by Mundpay and has no equivalent among competitors. The ideal bump price range is between R$ 19.90 and R$ 49.90, and the logic behind that number comes up later.

Why Does Appearing After Payment Work?

The answer lies in a well-known principle of decision psychology: the principle of consistency. Once a person makes a decision, they seek to act in a way that is consistent with it. Filling in the card details is the point where the purchase stops being a hypothesis and becomes a commitment.

Compare the two moments:

• Before payment: the buyer is still asking, "am I going to buy this?" Any extra offer adds weight to a decision that has not been made yet, and the instinct is to decline it to simplify things.
• After payment: the buyer has already decided, "I bought it." A small, related offer now feels like a natural complement to the choice they just made, not a new, difficult decision.

It is the same product, the same price, and the same buyer. Only the timing changes. And in digital commerce, where conversion is decided in seconds, that moment is the cheapest variable to optimize, because it does not cost a single cent of media spend.

How Much Does the Secret Order Bump Increase Average Order Value?

The gain varies with how relevant the offer is, but the mechanism is direct and easy to model. Taking a main product priced at R$ 100:

• Without a bump: R$ 100 ticket per sale.
• With the Secret Order Bump accepted: the order generates between R$ 130 and R$ 150 per sale.

The detail that changes everything is where that money comes from. It does not come from more visitors or more ad spend, it comes from sales that were already going to happen. You did not pay for additional traffic to capture that increase, you simply made better use of a sale you already had. In an operation running paid traffic, this directly improves the relationship between customer acquisition cost and revenue, the same cash flow that payout terms help unlock from the other side.

How Do You Set Up the Secret Order Bump in Practice?

The feature is simple to turn on, but it pays off when you follow three good practices:

• Relevance above everything. The offer needs to complement the main product. Someone buying a course will accept a support material, a template, or a bonus lesson. An unrelated product breaks the logic of consistency.
• Price within the ideal range. Between R$ 19.90 and R$ 49.90. Low enough to be an impulse decision, high enough to move the ticket. An expensive bump reintroduces the doubt that the post-payment moment had removed.
• One offer, not five. A single relevant bump converts better than a list that turns the checkout into a storefront. To add more revenue afterward, use the one-click upsell, which is the next step.

Set up this way, the Secret Order Bump becomes a lever that works on every sale, requiring nothing from the buyer beyond a single click at the right moment.

Conventional Order Bump, Secret Order Bump, and Upsell: What Is What?

It is worth separating the three, because many people mix them up:

• Conventional order bump: a complementary offer shown before finishing payment. It competes with a purchase decision still up in the air.
• Secret Order Bump: Mundpay's version, shown after the payment details, at the point of least resistance. Same one-click mechanic, different timing.
• One-click upsell: an offer presented after the purchase is already approved, without re-entering details. At Mundpay, the structure supports Upsell 1, Upsell 2, and Downsell in sequence.

The three are not competitors, they are layers. The Secret Order Bump raises the ticket at the moment of payment and the upsell adds revenue right after. Together, they turn a single sale into a higher-value order with no extra media cost.

When Should You Not Use the Secret Order Bump?

Not every sale calls for a bump, and forcing the feature can cost more than it earns. Avoid it when:

• The offer is unrelated to the product. A random bump right after the buyer enters their card details creates friction at the worst possible moment and can increase refunds.
• The price falls outside the range. A high price reintroduces the rational analysis that the post-payment moment had switched off.
• You stack offers. Too many bumps turn into noise and signal greed, the opposite of the experience that closes a good sale.

Honesty here protects your business: the Secret Order Bump is a sharp knife, great when used well and capable of irritating the customer when applied without judgment. Relevance and moderation are what separate extra revenue from post-sale headaches.