ROASStack
Lifecycle MarketingLifecycle Engine

Email & SMS Retention ROI Calculator

Simulate list monetization, open & click decay, campaign frequencies, Klaviyo/SMS tool costs, and Revenue Per Recipient (RPR).

Strategic Media Buyer Overview & Economic Rationale

This calculator measures the net ROI, campaign profitability, and revenue per recipient across your email and SMS marketing channels. While paid acquisition costs continue rising, owned retention channels drive margin expansion when optimized against platform software fees and promotional discounts. The formula isolates incremental repeat revenue against direct operating costs, helping growth marketers accurately measure the compounding financial leverage of lifecycle flows and broadcast campaigns.

Industry Presets

List Size & Broadcast Performance

Software & SMS Costs

Projected Email/SMS Revenue
$38,610Projected Monthly GMV

495 attributed orders

Lifecycle ROI Multiplier
17.7x ROI1671% ROI

Total Software Cost: $2,180.00

Revenue Per Recipient (RPR)
$0.142

Revenue per send

Net Retention Profit
$36,430

Net of software

Active Engaged Reach
34,000

68% of total

Email Clicks
7,616

Monthly traffic

Lifecycle Conversion Funnel

Active ListTotal OpensTotal ClicksOrders Placed0250005000075000100000
Masterclass Strategy Guide

Retention Marketing ROI: Calculating True Attributed Revenue from Klaviyo & SMS

Read our 13-minute deep-dive on incremental holdout testing, 10DLC SMS carrier fees, and list burnout economics.

Read Playbook
Lifecycle & CRM StrategyDocumentation & Strategy

Email & SMS Retention Marketing ROI Simulator: Strategy & Mathematics Guide

Core Concept & Economic Foundation

Paid media acquires first-time customers; email and SMS retention marketing produces real enterprise value and bottom-line profit. Top DTC brands generate 30% to 45% of total gross store revenue from owned channels (Klaviyo, Attentive, Postscript) at virtually zero marginal media cost. This simulator models subscriber active engagement rates, open and click decay curves, campaign send frequencies, SaaS subscription fees, SMS carrier costs, and Revenue Per Recipient (RPR).

How It Works & Formula Breakdown

Monthly Email Orders Generated

Formula #1
Orders = Active Subscribers * Campaigns * Open Rate % * Click Rate % * Click-to-Purchase CR %

The total number of completed purchase transactions generated by monthly broadcast campaigns.

Variable Definitions & Takeaways:
Total List Size — Subscriber Count
Total opted-in email and SMS contacts in your marketing database.
Active Rate % — Engaged Segment
Percentage of list that has opened, clicked, or visited in the past 90 days.
Open Rate % — Inbox Open Rate
Percentage of delivered campaign emails opened by recipients.
Click Rate % — Click-Through Rate
Percentage of opened emails where the recipient clicks an internal product link.
Click-to-Purchase CR % — On-Site Conversion
Percentage of email clickers who complete a checkout on your store.

Revenue Per Recipient (RPR)

Formula #2
RPR = Gross Campaign Revenue / Total Recipients Sent

The standard benchmark metric measuring average dollar value generated every time an email or SMS is delivered.

Retention Program Net Profit & ROI Multiplier

Formula #3
Net Profit = Gross Revenue - Total Software & SMS Costs | ROI Multiplier = Net Profit / Total Costs

Measures the bottom-line cash return on software tooling (Klaviyo) and SMS message carrier spend.

Practical E-Commerce Example & Numerical Walkthrough

Practical E-Commerce Example: Established DTC Brand with 50k Subscribers

A scaling lifestyle brand has 50,000 total email subscribers (68% active = 34,000). The brand sends 8 email campaigns per month, averages a 32% open rate, 2.8% click rate, 6.5% click-to-purchase CR, $78 AOV, $650 monthly Klaviyo software cost, and runs 3 SMS campaigns per month to a 10,000 SMS list at $0.015/message ($450 SMS cost).

Given Parameters & Store Assumptions:
Total Email Subscribers50,000 (34,000 active)
Email Campaigns / Month8 broadcast campaigns
Average Open Rate %32.0%
Average Click-Through Rate %2.80%
Click-to-Purchase Conversion Rate6.50%
Average Order Value (AOV)$78.00
Monthly Software & SMS Cost$1,100.00 ($650 Klaviyo + $450 SMS)
Step-by-Step Calculation:
1Calculate Monthly Email Orders Generated
272,000 sends * 0.32 * 0.028 * 0.065
➔ 1,585.8 (1,586 Monthly Orders)
2Compute Gross Email Revenue and Revenue Per Recipient (RPR)
Revenue: $123,708.00 | RPR: $0.455 per recipient
➔ $123,708.00 Gross Monthly Revenue ($0.455 RPR)
3Calculate Net Retention Profit and ROI Multiplier
$123,708 - $1,100 = $122,608.00
➔ $122,608.00 Net Retention Profit (111.5x ROI Multiplier)
Calculated Strategy Outcomes:
Monthly Retention Orders1,586 Orders
Gross Monthly Owned Revenue$123,708.00
Revenue Per Recipient (RPR)$0.455 / send
Total Software & SMS Cost$1,100.00
Net Program Profit (ROI Multiplier)$122,608.00 (111.5x ROI)
Strategic Media Buyer Takeaway: For an investment of $1,100 in SaaS and SMS tooling, the brand produces $123,708 in high-margin owned channel revenue with a stellar Revenue Per Recipient of $0.455.

Industry Benchmarks & Scaling Best Practices

MetricTop Tier (Top 10%)Industry AverageAction RequiredStrategic Context
Revenue Per Recipient (RPR)> $0.35 / send$0.15 - $0.28 / send< $0.08 / sendAverage revenue generated per individual email delivered.
Email Open Rate (30-Day Engaged)> 42.0%28.0% - 38.0%< 20.0%Higher open rates protect sender domain reputation and deliverability.
Owned Channel Revenue Share> 35% of Total GMV20% - 30%< 12%Percentage of store sales produced by email and SMS combined.
Automated Flow Share (% of Email Rev)> 50%35% - 48%< 20%Percentage of email revenue generated passively on autopilot.
Deliverability

Segment Campaigns by 30/60/90 Day Engagement

Blasting your entire unengaged email list degrades your domain sender reputation with Gmail and Yahoo. Send frequent broadcasts only to 30 and 60-day engaged subscribers.

Automation

Build the 4 Core Automated Flows First

Prioritize automated flows before manual campaigns: (1) High-converting Welcome Series, (2) Abandoned Cart, (3) Browse Abandonment, and (4) Post-Purchase Replenishment.

SMS Strategy

Use Two-Way Conversational SMS for High-Ticket Items

Rather than blasting generic discount codes on SMS, use interactive keyword triggers (e.g. "Reply SHADE for our sizing quiz") to increase click-to-purchase conversion rates.

Frequently Asked Questions

Common questions on email & sms retention marketing roi simulator, mathematical modeling & campaign scaling.

Revenue Per Recipient (RPR = Total Campaign Revenue / Total Delivered Recipients) accounts for both open rates, click rates, and conversion value simultaneously. It allows you to immediately identify your most profitable subject lines, product offers, and audience segments.

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