SMS Advertising for Local Businesses: A Practical Guide

SMS advertising is a commercial message sent to a customer who gave prior consent, governed in France by the postal and electronic communications code. For a local business it is the most direct channel there is: the message lands in the customer's pocket, takes seconds to read, and needs no app or account. It is also the most regulated, and the only one billed per message. Used well, it fills a quiet Tuesday. Used badly, it empties your customer list.

What SMS advertising means for a local business

Advertising SMS versus transactional SMS

The distinction is not cosmetic: it decides which rules apply. A text is advertising as soon as it tries to trigger a purchase, a visit or a booking. It is transactional when it supports something the customer already started.

A hybrid message stays advertising. Slipping a promotion into an appointment reminder moves the whole message into the commercial regime, with every obligation that comes with it.

Why SMS still works locally

Personal texting is shrinking while business texting grows: that is the paradox of the channel. The French regulator ARCEP measured average usage down to around 70 texts per month per SIM card in 2025, a 27% drop over the year (electronic communications market observatory). Private conversations moved to instant messaging apps, which clears the inbox.

Over the same period, businesses sent 15.26 billion push messages in France in 2025, 7.51% more than in 2024, including 6.2 billion promotional messages (af2m SMS marketing barometer). Retail alone accounts for 31% of that volume, ahead of banking and insurance. In other words, a French customer's text inbox now holds mostly business messages, with less and less personal noise to bury them.

For a local business, three concrete advantages: no spam filter to clear, no algorithm standing between you and the customer as on social platforms, and a phone number that changes far less often than an email address.

The legal framework for advertising SMS in France

Consent and opt-in

Article L34-5 of the postal and electronic communications code bans direct marketing by text to anyone who has not given prior consent. The CNIL, the French data protection authority, requires consent that is free, specific, informed and unambiguous, expressed by a positive action: a dedicated checkbox that is not pre-ticked, never a line buried in terms and conditions.

The existing-customer exception is narrower than most people assume. It applies only if the number was collected during a sale or a service, and if the marketing concerns similar products or services. A number captured in a prize draw or at simple account creation does not qualify.

In practice, for a shop or a restaurant: a checkbox at booking or at the till, explicit wording such as "I agree to receive offers by text from [business name]", and a record of the date and the source of that consent. This is exactly what a properly kept customer base is for: without a record of consent, you cannot prove it exists.

Required wording and the right to opt out

Every message must let the recipient identify the sender and object to further messages easily. Two practical consequences.

1. 1
   Name the sender in the first word

   The sender field is limited to 11 alphanumeric characters and must clearly identify the brand. Repeat the business name at the start of the message: an anonymous text reads as a scam attempt and gets deleted before it is read.

2. 2
   Offer a free, immediate exit

   A STOP keyword, an opt-out link or an action button must appear in the message. The request is handled without charge and without a complicated procedure.

3. 3
   Respect the sending window

   Promotional messages are allowed between 8 am and 9.30 pm, recommended Monday to Saturday, tolerated but discouraged on Sundays and public holidays.

These operator rules come from the af2m Business Messaging charter, in force since 1 March 2026 (charter overview). Your sending platform is supposed to enforce them automatically: check before you sign.

Penalties for non-compliance

Breaching article L34-5 exposes a sender to a fine of up to 75,000 euros for an individual and 375,000 euros for a company (text on Legifrance). Add the possible consequences of a CNIL inspection on the data protection side and, more immediately, reports to the French 33700 spam service, which damages your sender reputation with the carriers.

What an advertising SMS campaign costs

Average price per message

Text messages are billed per unit, usually as prepaid credits with no commitment. Spot-Hit's public price list shows 0.059 euro excluding tax per message from 100 to 10,000 messages, 0.054 euro up to 100,000, then 0.039 euro above one million per month (Spot-Hit SMS pricing). Other French providers sit in the same 0.04 to 0.06 euro range at independent-business volumes.

In concrete terms, a campaign to 500 customers costs about 30 euros. The payback maths is therefore simple: with a 25 euro average basket, two or three returning customers cover the cost.

What makes the cost vary

Four variables move the bill, and the first one is the most often forgotten.

• Message length. A text is billed per 160-character segment. One character over doubles the cost, and special characters or emoji switch the message to Unicode encoding, which cuts the segment to 70 characters.
• Monthly volume. Price lists are tiered, but the interesting tiers start above 10,000 messages per month, a threshold out of reach for an independent business.
• Send type. A text with delivery receipt or a custom sender name sometimes costs slightly more than a standard send.
• The provider's business model. Some add a monthly subscription to unlock reduced rates, others sell credits only. At low volume, credits without a subscription are almost always cheaper.

How to build an effective SMS campaign

Segment your customer list

Sending to everyone is the fastest way to push opt-outs up. Three segments are enough to start: customers who came in the last three months, those who have not returned for six months, and those who already responded to a previous offer. The first gets new products, the second a reason to come back, the third your best offers.

Segmentation assumes an up-to-date list, with the date of the last visit and a record of consent. That is the prerequisite for any genuinely targeted SMS campaign, and it is also what separates a customer file from a plain list of numbers.

Write a short, clear message

An effective advertising text holds four elements and one segment.

1. The business name, first, so you are identified immediately.
2. The offer in one sentence, with a figure and a date, no superlatives.
3. One action, and only one: come in, book, show the message.
4. The exit, a STOP keyword or an opt-out link.

Avoid running capitals, multiple exclamation marks and unknown shortened links: they trigger the reader's suspicion as much as the carriers' filters. If you include a link, use a recognisable domain.

Pick the right send time

The right moment is when the customer can act within the hour or within the day. For a restaurant, a message sent at 11 am for that day's lunch works better than an announcement three days ahead. For a beauty salon, late afternoon captures next-day bookings. For a retail shop, Thursday and Friday set up the weekend.

One rule always holds: a message that arrives while the business is closed, for an offer expiring that evening, is wasted. Test two slots across two comparable campaigns and keep the one that fills the room.

Advertising SMS examples by industry

Restaurants

[Bistrot Marceau] This Thursday night, mussels and fries for 14 euros while stocks last. Book on 01 23 45 67 89. STOP to 36180

[Le Comptoir] Our new autumn menu lands on Monday. Come and try it this week, aperitif on us when you show this message. STOP to 36180

Beauty and wellness

[Studio Lina] Three slots left on Saturday morning for highlights. Book on 01 23 45 67 89. STOP to 36180

[Institut Nova] Facial at 45 euros instead of 60 until 30 September. Book online. STOP to 36180

General local retail

[Cave Bertin] Wine fair from 3 to 12 October, up to 30% off a selection of 40 labels. STOP to 36180

[Garage Delmas] Free winter check with any service booked in October. 01 23 45 67 89. STOP to 36180

These templates share three traits: the business name up front, a dated offer and a single action. Adapt the STOP number your provider gives you. Note that a promotional text is never mixed with a review request: they are two messages, two purposes and two legal regimes, as our guide on asking for a Google review by SMS explains.

Tools for sending advertising SMS

Dedicated software versus carrier offers

Sending from your personal phone is out of the question: no sender field, no STOP handling, no proof of consent, and a personal number exposed. Bulk offers from telecom carriers suit large volumes but often require a contract and technical setup.

What an integrated tool adds

The value of an integrated tool comes down to one word: traceability. Consent is recorded the moment the customer gives it, STOP requests automatically remove the number from later sends, and segments are built on real visit data rather than a six-month-old spreadsheet export.

Ma Belle Note brings the opt-in customer base and SMS campaigns together in the same app, with texts billed on usage on top of the monthly subscription (details on the pricing page). SMS is one lever among several for bringing customers back: the wider logic is covered in our guide to loyalty for local businesses.

Whichever tool you pick, check three things before paying: automatic STOP handling, blocking of forbidden sending hours, and the ability to export your list if you change your mind.