Drive trust and revenue growth with accurate delivery date estimates

In today’s cutthroat, margin-thin market, constantly chasing new customers is like pouring water into a leaky bucket. With ecommerce customer acquisition costs (CAC) averaging around $70, the real growth engine isn’t acquisition—it’s retention.

Just look at the numbers:

• 5% of customers drive 35% of revenue for the average ecommerce brand.
• The top 10% spend 2x more per order than everyone else.

That kind of loyalty isn’t won with flashy points programs or clever email flows. It’s earned the hard way—by delivering on your promises, literally. 

Because in 2025, trust isn’t a nice-to-have. It’s your most valuable currency. 

The first step in loyalty? Getting the delivery promise date right.

Loyalty is earned through trust, and trust is built throughout the consumer journey. 

One of the very first promises a brand makes to consumers is the expectation it establishes around delivery dates. It sets the tone for the entire relationship. When that promise is kept, it builds credibility—signaling that the brand is reliable, trustworthy, and worthy of repeat business. 

When delivery expectations aren’t met—especially when orders arrive late—it damages brand trust. In fact, 27% of ecommerce returns are due to items arriving later than promised, according to Narvar’s 2024 State of Returns Report. And, we know that 67% of shoppers say a bad post-purchase experience destroys loyalty.

When delivery promises are broken, even unintentionally, the foundation for future loyalty starts to crack. In this way, the delivery date isn’t just operational—it’s emotional. It’s the gateway to trust, and the entry point to long-term customer value.

Meet Narvar Promise—accuracy that builds trust and boosts conversion

According to McKinsey, 90% of consumers prioritize reliability over speed when it comes to delivery. In a world where carrier reliability is unpredictable and brands face operational strain, setting the right expectations around delivery dates can be the difference between new revenue and cart abandonment.

Narvar Promise is built for brands that want to offer that reliable delivery estimate, ultimately,  inspiring confidence from the product page to the doorstep. Instead of relying on static rules or simple averages, Promise leverages the power of IRIS™—Narvar’s proprietary Intelligent Retail Insights Service—to deliver up to 95% accurate Estimated Delivery Dates (EDDs) at key moments during the buying journey: product detail page, cart, and checkout.

Here’s how Promise works:

• 4 machine learning models, trained on over 42 billion consumer interactions annually, predict origin location, fulfillment timing, time-in-transit, and carrier performance.
• These models continuously learn and self-optimize based on real-time data from Narvar’s vast network. For example, test single delivery dates, ranges, or even hiding an EDD, when necessary, to optimize for conversion. 

The result?

• +17% increase in Add-to-Cart rates
• -9% decrease in cart abandonment
• +5% lift in overall conversion rates

These aren’t just performance metrics—they’re loyalty metrics. Every on-time delivery strengthens the relationship, increases the likelihood of repeat purchase, and unlocks greater Lifetime Value (LTV).

Predictability = Profitability

Retailers often focus on speed. But in today’s challenging retail landscape, predictability is the true growth lever. Narvar Promise ensures that consumers can trust your brand to deliver—not just on time, but on expectation.

When you "promise when you deliver and deliver when you promise," you’re not just avoiding customer service calls—you’re cultivating confidence. And that confidence pays dividends:

• Repeat customers spend 33% more per order
• Loyal customers are 5x more likely to forgive a mistake
• Brands that lead in customer experience outperform competitors by nearly 80%

Loyalty is built “Beyond Buy”

In the race to grow revenue, the smartest brands are shifting focus from acquisition to retention. With Narvar Promise and IRIS™, retailers can transform delivery estimates from a liability into a loyalty engine—one that builds trust, drives conversion, and fuels long-term growth.

Your next sale doesn’t start with a click. It starts with a promise.

See for yourself—request a demo of Narvar Promise.