The welcome series is the single most important automated flow in your Klaviyo account. It is the first impression a subscriber has of your brand through email, and it sets the tone for the entire customer relationship. Get it right, and 5-15% of new subscribers convert into paying customers within two weeks. Get it wrong, and those subscribers go cold before you ever get a second chance.
We build welcome series flows for every Klaviyo client, and the revenue impact is always the first thing brands notice. A well-crafted welcome series generates more attributed revenue than any other flow, including cart abandonment.
Why the welcome series is your most valuable flow
The welcome series outperforms other flows for one simple reason: timing. A new subscriber is at peak interest. They just gave you their email address, often in exchange for a discount or exclusive access. Their awareness of your brand is at its highest, and their willingness to engage with your emails is as strong as it will ever be.
Welcome emails have the highest open rates of any automated email — typically 50-60% for the first email. Compare that to 15-25% for regular campaigns. Every subsequent email in the series maintains above-average engagement because the subscriber is still in the discovery phase of the relationship.
The financial case is equally clear:
- 5-15% conversion rate from subscriber to first-time buyer
- 4x higher revenue per recipient than standard campaigns
- Higher long-term CLV — subscribers who convert through the welcome series have 20-30% higher lifetime values than those who convert later
- List quality signal — high welcome series engagement improves your overall sender reputation
The 5-email welcome structure
Here is the framework we use for every welcome series we build. Each email has a specific purpose in moving the subscriber from awareness to purchase:
| Timing | Purpose | Key content | |
|---|---|---|---|
| 1 | Immediately | Deliver value | Welcome + discount code + bestsellers |
| 2 | Day 2 | Build trust | Brand story + founder message |
| 3 | Day 4 | Provide proof | Reviews + testimonials + UGC |
| 4 | Day 7 | Remove friction | FAQ + shipping + returns + guarantees |
| 5 | Day 10 | Create urgency | Discount expiry reminder |
Step 1: Create the flow in Klaviyo
- In Klaviyo, go to Flows > Create Flow
- Search for "Welcome Series" in the flow library or create from scratch
- Set the trigger to List > Subscribed to List (select your main signup list)
- Add a conditional split after the trigger to separate customers from non-customers (someone who has already purchased does not need a first-purchase incentive)
Flow filters
- Has not placed order since starting this flow — stops the flow once someone converts
- Consent to receive marketing emails — GDPR compliance
Email 1: Welcome and deliver the incentive (immediately)
This email has the highest open rate you will ever achieve with this subscriber. Make it count.
Subject line
- "Welcome! Here's your 10% off code"
- "You're in. Here's your exclusive offer"
- "Welcome to [Brand] — your code is inside"
Content structure
- Warm welcome — thank them for joining, set expectations for email frequency
- Deliver the promise — the discount code or benefit they signed up for, prominently displayed
- Curated products — 3-4 bestselling products to make the first purchase easy
- CTA — "Shop Now" with the discount code auto-applied via URL parameter
Auto-apply the discount code via URL parameter rather than requiring manual entry. Every friction point between email click and checkout reduces conversion. Add
?discount=WELCOME10to your product links.
Email 2: Tell your brand story (Day 2)
The second email shifts from transactional to relational. People buy from brands they connect with emotionally.
Content ideas
- Founder story — why you started the brand, what problem you are solving
- Mission and values — sustainability, craftsmanship, community
- Behind the scenes — how products are made, your team, your process
- What makes you different — your unique selling points without being salesy
Keep it authentic. Do not write marketing copy — write like a human telling another human why they care about what they do.
Email 3: Social proof and bestsellers (Day 4)
By day 4, the subscriber knows who you are and what you offer. Now remove doubt with proof that other people love your products.
Content elements
- Customer reviews — 3-4 genuine reviews with star ratings
- User-generated content — real customer photos on social media
- Press mentions — logos of publications that have featured your products
- Bestsellers — your top-selling products with review counts
For more on building trust through email, see our cart abandonment guide which uses similar social proof techniques.
Email 4: Overcome objections (Day 7)
If the subscriber has not purchased after three emails, there is likely a specific concern holding them back. Address the most common objections:
- Shipping — delivery times, free shipping threshold, international shipping
- Returns — your return policy, how easy it is, free returns if applicable
- Quality — materials, certifications, guarantees
- Sizing — size guides, fit information, recommendations
Structure this as an FAQ or a "What you should know before buying" format. Make it genuinely helpful rather than salesy.
For more on building effective email content, read our email segmentation guide.
Email 5: Final conversion push (Day 10)
The final email creates urgency. If you offered a discount in Email 1, this is where you remind them it expires.
Content structure
- Discount expiry — "Your 10% off code expires in 48 hours"
- Product recommendations — personalised based on any browse behaviour
- Final CTA — clear, prominent button with auto-applied discount
- Alternative actions — "Not ready to buy? Follow us on Instagram / Check out our blog"
This email often has the second-highest conversion rate after Email 1 because the deadline creates genuine urgency.
Advanced welcome series tactics
Conditional splits for customers vs non-customers
If someone signs up and has already purchased (they are an existing customer joining your email list), they should receive a different welcome experience. Create a conditional split at the start of the flow:
- Has placed order at least once? YES — welcome to the community, no discount needed, focus on loyalty
- Has placed order at least once? NO — full welcome series with first-purchase incentive
Dynamic product recommendations
Use Klaviyo's product recommendation engine to personalise product suggestions in each email based on the subscriber's browsing behaviour or the products they viewed before signing up.
SMS integration
For subscribers with SMS consent, add an SMS message 1 hour after the first email: "Welcome to [Brand]! Your 10% off code is WELCOME10. Use it here: [link]". SMS reminders of the welcome discount have high conversion rates.
A/B testing
Test key elements over time:
- Discount percentage (10% vs 15% vs free shipping)
- Subject lines for each email
- Timing between emails (2 days vs 3 days)
- Number of products shown in Email 1
Read our essential flows guide for more on optimising Klaviyo flows.
Common mistakes
1. Delayed first email
Sending the first email 6 or 12 hours after signup dramatically reduces open rates. Send immediately — the subscriber is on your site right now.
2. Discount without expiry
An open-ended discount creates no urgency. Always set an expiry date (7-14 days) and remind them in the final email.
3. Too salesy, too early
The welcome series should build a relationship, not just push products. Emails 2 and 3 should focus on brand and trust before the harder sell in Emails 4 and 5.
4. Not suppressing from campaigns
Subscribers in the welcome series should be excluded from regular marketing campaigns. Receiving both simultaneously is confusing and dilutes the welcome experience.
5. Identical mobile and desktop experience
Over 60% of welcome emails are opened on mobile. Ensure your email templates are mobile-responsive with appropriately sized images, thumb-friendly buttons, and readable text.
The welcome series is where your email marketing programme either starts strong or starts losing money. A well-built welcome flow generates consistent, predictable revenue from every new subscriber who joins your list — automatically, without any ongoing effort.
If your current welcome series is a single "Welcome" email with a discount code, you are leaving significant revenue on the table. The 5-email structure we have outlined is proven across dozens of ecommerce brands we manage.
Need help building or optimising your welcome series? See our Klaviyo services or get in touch for a free account audit.
