Crafting the perfect promotional SMS
You have 160 characters to make a sale. Every word must earn its place. Here is how to write promotional SMS that your Kenyan customers read and act on.
SMS Character Limits
A standard SMS is 160 characters. If your message goes over 160, it splits into multiple segments (153 characters each for the second segment onward). This means higher costs and a broken reading experience. Keep your message under 160 characters whenever possible.
Quick rule: Write your draft. Count the characters. Cut anything that does not drive action. If you need more space, use abbreviations your customers understand , "Tdy" for today, "U" for you, "K" for OK.
But character count is only half the story. The real skill is understanding how your customers scan messages on their phones. Most Kenyans receive dozens of SMS messages daily , from M-PESA notifications, bank alerts, airtime promotions, and messages from friends and family. Your promotional SMS is competing for attention in a crowded inbox. The subject line equivalent is your first few words. If you open with "Dear Customer" or "We are pleased to inform you," you have already lost. Open with the value proposition immediately.
Offer First, Details Second
Your customer decides whether to read your SMS in under 2 seconds. Lead with the offer.
- Weak: "We are a clothing store located on Moi Avenue. We have new arrivals for men and women. Visit us today."
- Strong: "20% OFF all jackets this weekend only. Visit our Moi Avenue shop. Show this SMS to claim."
Put the value upfront. Details (location, time, terms) come after the offer.
The psychology behind this is simple: people act on self-interest. A customer does not care about your store's history or how long you have been in business. They care about what you can do for them right now. A discount, a limited-time offer, or an exclusive deal triggers an immediate mental calculation: "Is this worth my time?" Make that calculation easy by presenting the benefit in the first 40 characters.
Timing Matters Just as Much as Wording
Sending the right message at the wrong time kills your response rate. For Kenyan businesses, the best send times are:
- Weekday mornings (8 AM - 10 AM): People check their phones after dropping kids at school and before starting work. Ideal for retail promotions and daily deals.
- Lunch hour (12 PM - 2 PM): Customers are browsing their phones while eating. Good for restaurant promotions and flash sales.
- Late afternoon (4 PM - 6 PM): People are wrapping up work and thinking about what they need. Perfect for end-of-day sales and reminders.
- Friday afternoons: The best time for weekend promotions. Kenyans are planning their weekend activities and are most receptive to offers.
Avoid sending SMS very early in the morning, late at night, or on Sunday mornings when many people are in church. Also consider payday cycles , most salaried Kenyans are paid around the 25th of each month. The week following payday is prime time for higher-value offers.
Examples That Work for Kenyan Businesses
Retail clothing shop: "Flash sale , all dresses KES 500 off. Today only at Eastleigh Mall, Shop 12. Show this SMS."
Electronics dealer: "New Bluetooth speakers arrived. KES 1,200 only. Call 0712 XXX XXX to order. Free delivery in Nairobi."
Restaurant: "Buy 1 chapati, get 1 free. Fridays only at Mama's Kitchen, Kencom. Show this SMS."
Salon: "Book a braiding appointment this week and get 10% off. Reply BRAID to 20XXX to book."
Hardware store: "Cement KES 650 per bag this week only. Free delivery for orders above 10 bags. Call 07XX XXX XXX."
Pharmacy: "Blood pressure check free this Saturday. Get 5% off all prescription refills. Visit our Kimathi Street branch."
Car wash: "Full exterior wash KES 300 every Wednesday. Show this SMS. Ndovu Car Wash, next to Shell."
Notice a pattern in all the examples above: each message includes a specific action the customer must take, whether visiting a shop, making a call, or replying with a keyword. A promotional SMS without a clear call to action is just noise. Always tell the customer exactly what to do next.
Building a Quality SMS Subscriber List
The most effective promotional SMS in the world is useless if you are sending it to people who do not want it. Building a permission-based subscriber list is essential. In Kenya, the Data Protection Act 2019 requires businesses to have consent before sending promotional messages to individuals. Beyond compliance, customers who have opted in are far more likely to engage with your messages.
How do you grow your list? Train your counter staff to ask every customer: "Would you like to receive SMS alerts when we have promotions?" Offer a small incentive for signing up , KES 50 off their next purchase or entry into a monthly draw. Add an opt-in checkbox to your SokoWise POS at checkout. You can also collect numbers through your eCommerce store and social media channels.
A list of 200 engaged subscribers who chose to hear from you will outperform a list of 2,000 random numbers every time. Engagement, not size, drives conversions.
Measuring SMS Campaign Success
To know whether your promotional SMS is working, track three metrics:
- Delivery rate , What percentage of messages reached a phone? SokoWise shows you failed deliveries so you can clean your list.
- Response rate , How many customers took the desired action? If you include a unique code or ask customers to "Show this SMS," you can track in-store redemptions.
- Conversion value , What was the total revenue generated from the campaign? Compare this to the cost of sending the SMS batch to calculate your ROI.
A good promotional SMS campaign in Kenya typically sees a 15-25% response rate for well-targeted offers. If your response rate is below 10%, test different offers, timing, or audience segments.
Use Custom Sender ID for Trust
When customers see a random number, they think "spam." When they see your business name , "SokoWise" or "Mama's Kitchen" , they open the message. SokoWise lets you set a custom Sender ID (your business name, up to 11 characters). This builds trust before the message is even read.
Most Kenyan businesses that switch from a generic number to a Sender ID see higher open rates. It costs you nothing extra. Set yours up in the SokoWise dashboard under SMS Settings.
Write your first promotional SMS today , keep it short, lead with the offer, and use your Sender ID. And when you are ready to scale, explore the full bulk SMS toolkit in SokoWise to send targeted campaigns, track deliveries, and watch your sales grow.