Updated for 2026 with the latest Casper referral incentives, program terms, and performance data.
The Casper referral program has been one of the most studied referral strategies in DTC ecommerce. By offering a dual-sided incentive — a $75 Amazon gift card for the referrer and a percentage discount for the friend — Casper turned its happiest customers into a scalable acquisition channel that delivers 7x the return of its average marketing investment. That is not a marginal improvement. For a company that spent over $423 million on marketing in roughly four years leading up to its IPO, finding a channel with that kind of efficiency changed the math on customer acquisition.
But the program is more than a coupon code. It is a case study in how DTC brands can use word-of-mouth incentives to offset the rising cost of paid acquisition, build trust in a high-consideration purchase category, and create a flywheel where every satisfied customer funds the next one.
This guide breaks down every layer — the incentive structure, the mechanics, the performance data, and the strategic decisions that made it work. Whether you are evaluating the casper referral code as a shopper or studying it as an ecommerce operator building your own referral engine, the specifics are here.
Key Takeaways
- The Casper referral program offers a dual-sided incentive: referrers receive a $75 Amazon gift card, and referred friends get a discount on their first mattress purchase (historically 10% off, with periodic increases during promotions).
- Referral rewards are capped at $599 per year, which limits the program to roughly 7-8 successful referrals per advocate annually.
- Casper's referral channel delivers 7x the ROI of the company's average marketing spend, making it one of their most efficient acquisition channels.
- A/B testing lifted referral conversion rates by 13%, and limited-time "referral blowout" campaigns with temporarily increased rewards have driven additional conversion lifts.
- Casper's high customer acquisition costs — with marketing expenses consuming 35-43% of revenue — explain why a high-ROI referral channel was critical to the business model.
- Mattresses are low-frequency purchases with only 16% of Casper customers making repeat purchases, making referrals especially valuable for acquiring net-new customers.
- Ecommerce brands of any size can replicate Casper's referral mechanics using modern referral program platforms without Casper-level budgets.
What Is the Casper Referral Program?
The Casper referral program is a structured word-of-mouth system designed to turn customers into active promoters. It operates through a dedicated portal at casper.com/pages/friends, where anyone with a Casper account can generate a unique referral link and share it with friends, family, or their social audience.
At its core, the program uses a dual-sided incentive model, meaning both the referrer and the new customer receive a benefit:
- Referrer reward: $75 Amazon gift card after a qualifying purchase
- Friend reward: Discount on their first mattress order (historically ~10% off, with higher tests over time)
This structure is intentional. It ensures:
- The referrer has a clear motivation to share
- The new customer has an immediate reason to convert
Casper introduced this program as part of a broader DTC strategy that prioritized organic growth. As early as 2015, leadership noted that most customers were already coming from word-of-mouth. The referral program simply formalized that behavior into a scalable, trackable channel.
A few structural choices make the program especially notable:
- Low barrier to entry: Anyone with an account can refer — no prior purchase required
- Geographic availability: Open to customers in the US and Canada
- Third-party reward: Uses Amazon gift cards instead of store credit, increasing perceived value
These decisions reflect Casper’s goal of maximizing participation and reach, rather than limiting the program to existing high-value customers.
Understanding how a referral program works at a structural level helps explain why these design choices — from dual-sided rewards to reward type — play a critical role in driving both acquisition and engagement.
How the Casper Referral Code Works
The mechanics of the Casper referral program are straightforward, but the details matter for anyone trying to use a casper referral code or understand the program's design.
- Create or log in to a Casper account at casper.com. No prior purchase is required.
- Visit the referral portal at casper.com/pages/friends to generate your unique referral link.
- Share the link via email, text, social media, or any other channel. Casper provides built-in sharing options for common platforms.
- Your friend clicks the link and receives a discount automatically applied to their first mattress order.
- After your friend completes the purchase and the return window passes (Casper offers a 100-night trial), you receive your $75 Amazon gift card via email.
What Qualifies
Not every Casper purchase triggers a referral reward. According to the Casper referral program terms, the following exclusions apply:
- Bundles
- Final Sale and Clearance items
- Original mattress, Original Hybrid mattress, Element mattress, and Snug Mattress
- Digital Gift Cards
- Casper Outlet purchases
The qualifying purchase must be the friend's first mattress order through Casper's DTC channel. The casper referral code cannot be stacked with other promotional codes, which prevents discount stacking that would erode margins.
Reward Fulfillment
The referrer's $75 Amazon gift card is typically delivered within a few weeks after the friend's purchase clears the return window. This delay is a risk-management decision — mattresses have high return rates industry-wide, and Casper's 100-night trial means the company needs to confirm the sale is final before paying out the referral reward.
Annual Cap
Referral rewards are capped at $599 per year, which translates to approximately 7-8 successful referrals annually. This cap serves two purposes: it limits fraud exposure and ensures the program is used by genuine advocates rather than arbitrageurs.
Casper Referral Rewards Breakdown
Understanding the full casper rewards structure requires looking at how the incentives have evolved and how they compare to the company's other marketing channels.
Current Reward Structure
Casper’s referral program is designed to balance strong incentives with clear limitations, ensuring it drives acquisition while remaining cost-controlled.
- Referrer reward: $75 Amazon gift card for each successful referral
- Friend discount: Percentage off first mattress purchase (typically 10%, with higher discounts during promotions)
- Annual cap: $599 per year (approximately 7–8 successful referrals)
Some operational details shape how and when rewards are received:
- Reward delivery: Sent via email after the 100-night trial window is completed
- Eligibility: Available in the US and Canada; requires a Casper account
- Stacking rules: Cannot be combined with other promo codes
Casper has also expanded the program into smaller product categories:
- Pillow referral: $10 Amazon gift card offered through a separate referral flow
This structure reflects a high-value, delayed reward model, which helps ensure referrals lead to committed purchases rather than low-intent conversions.
Why Amazon Gift Cards Instead of Casper Credit
One of the most notable design decisions in the Casper referral program is rewarding referrers with Amazon gift cards rather than Casper store credit. This is a strategic choice driven by purchase frequency.
Mattresses are bought once every 7-10 years on average. Offering store credit to someone who just bought a mattress creates a reward they cannot meaningfully use for years. Amazon gift cards provide immediate, tangible value — which is exactly what drives referral behavior. Research consistently shows that the real value of referral programs depends on the perceived usefulness of the reward.
This approach trades repeat-purchase potential for referral volume. For a low-frequency, high-AOV product like mattresses, that trade-off makes sense.
Historical Incentive Changes
Casper has adjusted its referral incentives over time:
- Early program: $50 Amazon gift card for referrer, discount for friend
- Optimized offer: $75 Amazon gift card for referrer, 10% off for friend
- Referral blowouts: Temporarily increased referrer rewards during promotional periods
Casper has iterated on both the referrer reward and the friend's discount over time, reflecting the company's data-driven approach to finding the optimal incentive balance. A/B testing revealed that the friend's incentive is an important lever for driving conversions — a more compelling offer for the friend makes the referrer's recommendation more likely to convert.
Pillow Referral Expansion
Casper expanded its referral program beyond mattresses to include pillow referrals, offering a $10 gift card for each successful pillow referral. This expansion addressed a key limitation of mattress-only referrals: frequency. Pillows are replaced more often and have a lower purchase barrier, creating additional referral opportunities between mattress purchases.
The Business Case: Why Casper Bet on Referrals
Casper's referral strategy did not emerge in a vacuum. It was a direct response to the economics of DTC mattress sales, and understanding those economics explains why the casper mattress referral channel became so important to the company.
Customer Acquisition Cost Crisis
Casper's S-1 filing for its February 2020 IPO revealed the financial reality of DTC mattress sales:
- Marketing expenses consumed 35-43% of revenue — far above the industry average of 10-12%
- Over $423 million spent on marketing in roughly four years through September 2019
- The company generated just three dollars in revenue for every dollar spent on marketing, an unsustainable ratio
- $92 million net loss in 2018 on $358 million in revenue
With a media split of 50% digital (search, social, video, podcasts) and 50% traditional (direct mail, radio, TV, print, outdoor), Casper was burning through capital on channels with diminishing returns. The referral program — delivering 7x the ROI of average marketing — was a critical counterweight.
The Low-Frequency Purchase Problem
Mattresses compound the acquisition cost problem because they are inherently low-frequency purchases. Casper's own data showed:
- Only 16% of customers made repeat purchases
- The average mattress replacement cycle is 7-10 years
This means Casper needed to extract maximum value from each customer interaction. A referral program turns a one-time buyer into a multi-year acquisition channel — even after they stop buying.
Word-of-Mouth Trust in High-Consideration Purchases
Mattresses are a high-consideration, high-anxiety purchase. Consumers cannot meaningfully test a mattress in 5 minutes at a store, and online shoppers are buying based entirely on reviews, brand reputation, and peer recommendations.
The data supports this: 92% of consumers trust word-of-mouth recommendations over all other forms of advertising, and word-of-mouth influences 20-50% of all purchasing decisions. For a product category where trust is the primary conversion barrier, a referral from a friend who actually sleeps on the mattress is the highest-converting message possible.
The Casper Growth Timeline
- 2014: Founded; launched the “mattress in a box” DTC model
- Month 1: Reached $1 million in revenue
- 2015: COO states most customers come from word-of-mouth
- 2016–2019: $423 million cumulative marketing spend
- 2019: Surpassed $300 million in annual revenue
- Feb 2020: IPO at $12/share ($575M valuation, down from $1.1B private)
- Nov 2021: Acquired by Durational Capital Management for $310M ($6.90/share)
- Jan 2022: Taken private and delisted from NYSE
- 2024: Sold to Carpenter Co.
- 2026: Operating as a private company; referral program remains active
The timeline shows a company that grew fast on word-of-mouth, spent aggressively on paid acquisition to sustain growth, and ultimately found that the referral channel remained one of its most efficient marketing investments throughout every phase.
Casper's Referral Blowout Strategy
One of the most innovative elements of the Casper referral program is the "referral blowout" — a limited-time campaign that temporarily increases the referral incentive to create urgency and spike conversions.
How Referral Blowouts Work
During a referral blowout, Casper temporarily increases the referrer reward above the standard $75 Amazon gift card. The friend's discount may also be adjusted upward. These campaigns run for a limited window — typically a few days to a week — and are promoted through email, in-app notifications, and social media.
Results
The results from Casper's Friendbuy-powered referral program demonstrate the value of this approach:
- Significant spikes in referral volume as existing advocates re-engage dormant contacts during blowout windows
- A 220% increase in share rates through best practice optimizations and A/B testing
- Higher engagement from referred customers during promotional periods
The blowout strategy works because it introduces scarcity into a channel that normally has no time pressure. A customer who has been sitting on a referral link for months suddenly has a reason to share it today.
A/B Testing Infrastructure
Beyond blowouts, Casper runs continuous A/B testing on its referral program. Through systematic testing of messaging, incentive levels, and sharing mechanics, the company achieved a 13% increase in referral conversion rates — a meaningful lift on top of an already high-performing channel.
This testing cadence is worth noting for any ecommerce brand running referral programs. The default incentive structure is rarely the optimal one. Brands that measure referral program success and iterate consistently outperform those that set and forget.
Casper Referral Program vs. Other Mattress Brands
Casper's referral strategy does not exist in isolation. The DTC mattress space is crowded, and several competitors run their own referral programs. Here is how they compare:
Casper
Offers a $75 referrer reward and 10%+ off for the friend’s first mattress purchase. Rewards are issued as an Amazon gift card, with an annual cap of $599.
Notable feature: Runs “referral blowouts” with limited-time incentive increases.
Purple
Provides a $50 referrer reward and $50–$100 off for the friend, typically as store credit.
Notable feature: Discounts are often tied to specific products.
Nectar
Uses a $25 Amazon gift card for the referrer and $125 off for the friend.
Notable feature: Lower barrier to entry, but also lower referrer reward.
Saatva
Offers $75 for both referrer and friend, usually as Saatva store credit.
Notable feature: Aligns with its premium/luxury brand positioning.
Helix
Provides a $50 Amazon gift card and $50 off for the friend.
Notable feature: Integrates referrals with its sleep quiz experience.
Key Differentiators
- Casper's use of Amazon gift cards rather than store credit is its biggest structural advantage. Competitors like Saatva and Purple offer store credit, which has limited utility for a customer who just bought a mattress. Amazon gift cards are effectively cash equivalents, making Casper's referral reward immediately useful.
- The referral blowout mechanic is unique to Casper in this category. No other major mattress brand runs systematic time-limited incentive increases on their referral program.
- The friend discount structure is competitive in comparison. While Nectar offers a higher absolute dollar amount ($125 off), Casper's percentage-based discount scales with the product price, which can make it more valuable on premium mattresses.
For brands looking to understand how referral programs compare across industries, Rivo's analysis of the best referral programs among DTC brands provides a broader context.
What Ecommerce Brands Can Learn
Casper's approach offers several transferable lessons for ecommerce operators, regardless of industry or company size.
Match the Reward to the Purchase Cycle
Casper's decision to use Amazon gift cards instead of store credit is a direct response to mattress purchase frequency. The lesson: your referral reward should be valuable to the referrer on the timeline they will actually use it.
For high-frequency ecommerce categories (beauty, food, supplements, apparel), store credit can work because the customer will return within weeks. For low-frequency categories, cash equivalents or third-party gift cards drive more referral activity.
The Friend's Incentive Matters More Than the Referrer's
Casper has iterated on the friend's discount over time because the data showed the friend's incentive is a primary conversion driver. A referrer will share regardless of whether their reward is $50 or $75 — but the friend needs a compelling reason to act on the recommendation.
This aligns with research on what makes referral programs drive word-of-mouth: the referred customer's first experience with the brand determines whether the referral converts.
Use Time-Limited Incentive Increases
Casper's referral blowout strategy proves that referral programs benefit from urgency mechanics — the same way flash sales boost ecommerce revenue. Temporarily increasing the incentive re-activates dormant advocates and creates conversion spikes.
Any brand can implement this. Run a 48-hour referral bonus once per quarter, increase the reward by 50-100%, and promote it through email to your existing customer base. The data on referral programs increasing average order value supports this approach.
A/B Test Everything
Casper's 13% conversion lift from A/B testing did not come from one big change. It came from systematic testing of headlines, CTA placement, incentive framing, sharing mechanics, and email sequences. The referral program is a product, and it should be iterated like one.
Cap Rewards to Control Fraud
The $599 annual cap prevents gaming while still allowing 7-8 successful referrals per year — more than enough for genuine advocates. Brands running uncapped referral programs often discover fraud clusters that erode ROI. Casper's cap is a practical guardrail that protects program economics without limiting real advocacy. For more on this topic, see the data on referral fraud detection and prevention.
Account for Returns in Reward Timing
Casper delays referral payouts until after the 100-night trial window closes. This prevents paying referral rewards on purchases that get returned — a common leak in referral program economics, especially in categories with generous return policies.
Building Your Own Referral Program
Choosing the right platform depends on your scale, tech stack, and how integrated you want your retention system to be. Below are common tools used to power referral and loyalty programs:
- Rivo: Best for Shopify-native brands that want referrals, loyalty, and memberships in one platform. Dual-sided referral rewards, VIP tiers, paid memberships, and checkout extensions (used by 9,000+ Shopify brands).
- Friendbuy: Best for enterprise DTC brands with custom integration and experimentation needs. A/B testing, referral “blowouts,” and advanced analytics.
- ReferralCandy: Best for small to mid-sized Shopify stores focused primarily on referral programs. Simple setup with automated reward distribution.
How to choose
- Go with Rivo if you want an all-in-one retention system
- Choose Friendbuy if you need deep customization and testing
- Use ReferralCandy if you want a quick, lightweight referral setup
Rivo stands out for Shopify merchants because it combines referral programs with loyalty points, VIP tiers, and paid memberships in a single platform — eliminating the need to manage multiple apps. With 9,000+ brands and strong Shopify App Store ratings, it is one of the most adopted retention platforms in the Shopify ecosystem.
Request a Demo to see how Rivo's referral engine works for your store.
Final Verdict
The Casper referral program is one of the most well-documented referral strategies in DTC ecommerce. Its 7x ROI relative to average marketing spend, 13% conversion lift from A/B testing, and 220% share rate increase demonstrate what a systematically optimized referral channel can deliver.
The program is not without limitations. The $599 annual cap restricts high-volume advocates. The exclusion list removes several product lines from eligibility. And the delayed payout tied to Casper's 100-night trial means referrers wait weeks to months for their reward.
But for a company that was spending 35-43% of revenue on marketing, the referral program represents a fundamentally more efficient acquisition model. And the principles behind it — dual-sided incentives, third-party rewards for low-frequency products, time-limited blowouts, and continuous optimization — are transferable to any ecommerce brand.
If you are building a referral program for your Shopify store, the Casper model is a strong starting template. Platforms like Rivo give you the infrastructure to implement dual-sided referrals, A/B test incentive levels, and combine referrals with loyalty and membership programs — all without building custom technology.
Get Started Free and build a referral program that drives real acquisition.
FAQ
How much do you get for a Casper referral?
Referrers currently receive a $75 Amazon gift card for each successful mattress referral. During limited-time "referral blowout" promotions, Casper has temporarily increased this reward. Referral rewards are capped at $599 per year, allowing approximately 7-8 successful referrals annually.
Can you stack a Casper referral code with other discounts?
No. According to Casper's referral program terms, the referral discount cannot be combined with other promotional codes. The friend discount applies only to the first mattress order and is mutually exclusive with other promotions running on casper.com.
Is the Casper referral program available outside the US?
The Casper referral program is available to residents of the United States and Canada. International customers are currently not eligible to participate as either referrers or referred friends. You need a Casper account to access the referral portal, but no prior purchase is required to start referring.
How long does it take to receive the Casper referral reward?
The $75 Amazon gift card is typically delivered within a few weeks after the referred friend's purchase, but the actual timeline depends on Casper's 100-night trial period. If the friend returns the mattress within the trial window, the referral reward is not issued. This delayed payout protects Casper from paying rewards on purchases that are ultimately returned.
Why does Casper use Amazon gift cards instead of store credit?
Casper uses Amazon gift cards because mattresses are low-frequency purchases — customers buy one every 7-10 years on average. Store credit would have minimal perceived value for a customer who just bought a mattress and will not need another one for years. Amazon gift cards are effectively cash equivalents, making them immediately useful and more motivating for referral behavior.
