Master SMS Marketing Metrics to Optimize Campaigns

Key SMS Marketing Metrics You Should Track for Success

Estimated reading time: 6 minutes

Key Takeaways

• Delivery rate should stay ≥ 95 % to ensure your list is clean and your provider reliable.
• High open rates (90‑95 %) confirm that your messages are being seen; timing and personalization are key.
• Boost CTR (5‑20 %) by using short, trackable URLs and clear calls‑to‑action.
• Track conversion rate (2‑10 %) with unique promo codes or UTM parameters to attribute revenue.
• Keep opt‑out rates < 1 % by respecting frequency and delivering value.

Table of Contents

• Why SMS Metrics Matter
• Core SMS Marketing Metrics
• 1. Delivery Rate
• 2. Open Rate
• 3. Click‑Through Rate (CTR)
• 4. Conversion Rate
• 5. Unsubscribe / Opt‑Out Rate
• 6. Subscriber Growth Rate
• 7. List Size
• 8. Campaign ROI
• Best Practices for SMS Metric Optimization
• Summary Table
• FAQ

Why SMS Metrics Matter

SMS marketing is not just about blasting a coupon code into the ether. Every message you send is an opportunity to nurture a relationship, drive a purchase, or reinforce brand loyalty. Without the right metrics, you’re essentially shooting in the dark. By tracking the right data points, you can:

• Validate the effectiveness of your creative and offers.
• Diagnose delivery or compliance issues before they hurt your reputation.
• Optimize spend by focusing on high‑return segments.
• Align messaging with broader marketing goals.

Core SMS Marketing Metrics

Data sourced from Twilio, Airship, Textedly, and Infobip benchmarks

1. Delivery Rate

What It Measures – Delivery rate tells you the proportion of messages that actually reached the recipient’s phone. It’s a litmus test for the health of your list, the quality of your provider, and the cleanliness of your data.

Formula – (Delivered ÷ Sent) × 100

Typical Benchmark – Aim for **≥95 %**. Anything below signals invalid numbers, spam‑triggering content, or provider hiccups.

Why It Matters

• List Hygiene: Low delivery can indicate stale or incorrect numbers.
• Provider Quality: Consistent drops may hint at carrier issues.
• Compliance: Spam triggers reduce deliverability.

Actionable Tips

2. Open Rate

What It Measures – While SMS is inherently “open”, the open rate serves as a proxy for whether the message was read or dismissed. Carriers that provide “read” receipts help, but a high open rate still signals engagement.

Typical Benchmark – **90–95 %**, far higher than email.

Actionable Tips

• **Timing Matters** – Send during peak hours (10 AM–2 PM).
• **Personalization** – Add name or location.
• **Testing** – A/B test subject lines or emojis.

Sources: Airship, Infobip

3. Click‑Through Rate (CTR)

What It Measures – CTR shows how many recipients clicked a link in your SMS, indicating CTA effectiveness.

Formula – (Unique clicks ÷ Delivered) × 100

Typical Benchmark – **5–20 %** (industry‑dependent).

Actionable Tips

Sources: Twilio, Textedly, Infobip

4. Conversion Rate

What It Measures – Reflects the ultimate business goal: purchases, registrations, or any desired action.

Formula – (Conversions ÷ Delivered) × 100

Typical Benchmark – **2–10 %** (varies by funnel).

Why It Matters – Directly links SMS to revenue; needed for ROI calculations.

Actionable Tips

• Integrate with analytics (UTM, unique promo codes).
• Segment by intent (new vs. repeat customers).
• Track funnel stages to pinpoint drop‑offs.

Sources: Twilio, Textedly, Infobip, Airship

5. Unsubscribe / Opt‑Out Rate

What It Measures – Proportion of recipients who opt‑out after a campaign.

Formula – (Opt‑outs ÷ Total Recipients) × 100

Typical Benchmark – **<1 %**. Higher rates signal frequency or content issues.

Actionable Tips

• Respect frequency limits.
• Ensure each message adds value.
• Segment low‑engagement users and reduce frequency.

Sources: Twilio, Textedly

6. Subscriber Growth Rate

What It Measures – Indicates how well acquisition strategies are working.

Formula – (New Subs – Lost Subs) ÷ List Start × 100

Why It Matters – Positive growth signals brand momentum; negative growth signals churn.

Actionable Tips

• Offer opt‑in incentives (coupons, exclusive content).
• Leverage multiple channels (web, in‑store, social).
• Track weekly/monthly to spot trends.

Source: Textedly

7. List Size

What It Measures – Total number of opted‑in subscribers.

Why It Matters

• Determines maximum reach.
• Enables segmentation for relevance.

Actionable Tips: Segment by demographics (age, location, purchase history) and maintain hygiene by removing inactive numbers.

Source: Textedly

8. Campaign ROI

What It Measures – Profitability of SMS campaigns.

Formula – (Revenue – Cost) ÷ Cost × 100

Why It Matters – Aligns spend with revenue; guides budgeting.

Actionable Tips

• Track revenue with unique promo codes or UTM tags.
• Include all costs (provider fees, creative, labor).
• Re‑evaluate quarterly to adjust strategy.

Sources: Twilio, Airship

Best Practices for SMS Metric Optimization

Summary Table

FAQ

What is a good delivery rate for SMS campaigns?

A delivery rate of **≥95 %** is considered healthy. Below that, you should clean your list and check for provider issues.

How can I improve my SMS click‑through rate?

Use short, custom URLs, add a clear call‑to‑action, and test different emojis or phrasing. Shortening links and using trackable URLs also help.

Why is the SMS open rate so high compared to email?

SMS appears instantly on the phone’s lock screen, making it almost instantly visible. This immediacy drives **90‑95 %** open rates.

What should I track to measure ROI?

Track revenue generated from each SMS using unique promo codes or UTM parameters, then subtract total campaign costs (provider fees, creative, labor) and apply the ROI formula.

How often should I clean my subscriber list?

Perform a hygiene check at least **monthly**. Remove numbers that have bounced, are inactive for 3 + months, or have opted out.