Quick answer
Royal Mail Advertising Mail is Royal Mail's discounted postage service for marketing mail. Royal Mail defines it as mailings with 'a largely uniform message to all addresses, with the purpose of promoting the sale or use of products or services, or to encourage contribution to, or support of a cause'. Every item in the posting must be advertising, in letter or large letter format, and a sample must go to Royal Mail's Advertising Mail team. Unsorted options start at 1,000 letters or 250 large letters, and sorted options at 4,000 letters or 1,000 large letters. On the April 2026 rate card, a 2nd Class letter costs 74.0p with Standard Unsorted Advertising Mail, against 91.0p for Business Mail. With Economy Low Sort Mailmark it costs as little as 29.0p. Statements, bills, renewal notices and other mail people are expecting do not qualify.
Key takeaways
- Advertising Mail is for promotional mail with a largely uniform message. Personalisation is fine, but the main purpose must be to sell, promote or raise support for a cause.
- The whole posting must be advertising. A statement or bill with a leaflet inside does not qualify, because the statement is the main item.
- Minimum volumes are 1,000 letters (250 large letters) for unsorted and 4,000 letters (1,000 large letters) for sorted mail, per class, per posting.
- On the April 2026 rate card, an Economy Low Sort Mailmark letter costs 29.0p–30.4p as Advertising Mail, against 66.4p–69.5p for the same option as Business Mail.
- You must suppress against the Mailing Preference Service (where data is not consent-based) and your own opt-out list within 30 days of posting, and Royal Mail can audit and back-charge non-compliant mailings.
What is Royal Mail Advertising Mail?
Royal Mail sells two main families of bulk letter postage for businesses. Business Mail is for general correspondence such as statements, invoices and service letters. Advertising Mail is for marketing, and it is priced well below Business Mail because Royal Mail wants to encourage mail as an advertising channel. In return, the mail has to meet Royal Mail's definition of advertising, and the sender has to follow its data and sampling rules.
Royal Mail's user guide defines Advertising Mail as 'mailings that comprise a largely uniform message to all addresses, with the purpose of promoting the sale or use of products or services, or to encourage contribution to, or support of a cause'. So a charity appeal, a retail offer, a new-customer mailing or a catalogue can all qualify. A letter can carry the recipient's name, address and tailored details such as loyalty points, as long as the message is basically the same for everyone and its main job is to promote.
| Entry criteria (Royal Mail user guide, April 2026) | What it means in practice |
|---|---|
| 100% advertising items | Every item in the posting must qualify. Do not mix service letters into an Advertising Mail posting. |
| Letter or large letter format | Packets and parcels cannot be sent as Advertising Mail letters. See our envelope sizes guide for the format limits. |
| Sorted mail presented to Low Sort rules | Sorted postings must be correctly sorted (into 86 segregations for Low Sort) and presented in trays, bags or bundles. |
| Data requirements | Suppress against the Mailing Preference Service (MPS), including MPS deceased, where data is not consent-based, and against your own opt-out file, within 30 days of posting. |
| Samples | Send a sample or seed item to Royal Mail's Advertising Mail Content Control Team for each posting. |
What qualifies, and what doesn't
Royal Mail publishes a content guidance list of example mailings. It is indicative only, and Royal Mail judges each mailing on its merits, but it shows the line clearly: the item must be sent to promote, not because the recipient is owed or expecting it.
| Mailing | Qualifies? | Why (Royal Mail guidance) |
|---|---|---|
| Seasonal catalogue or brochure to customers or prospects | Yes | Promotes the sale of products or services |
| Unsolicited discount codes, vouchers or event invitations | Yes | Promotional, and there is no obligation to send them |
| Charity appeal, or a reminder to renew a supporter subscription | Yes | Encourages donation to a cause |
| Loyalty mailer with offers, showing the customer's points balance | Yes | Promotes the sale of products or services |
| Insurance quotes or a new credit card offer | Yes | Promotes products or services |
| Unsolicited customer magazine or branded calendar | Yes | Part of a customer communication programme, not paid for by the recipient |
| Customer survey to improve a product or service | Yes | Promotes use or improvement of the product or service |
| Bank statement or utility bill with an advertising leaflet | No | The statement or bill is the main item; the advert is secondary |
| Insurance policy or other personalised documents | No | Content is unique to each person, so not uniform |
| Membership or subscription magazine | No | The recipient is expecting it |
| Price increase notice, AGM notice or annual report | No | The purpose is information, not promotion |
| Political party mailings aimed at influencing voting | No | Excluded by Royal Mail |
Getting it wrong is expensive
Royal Mail audits Advertising Mail. If a posting does not comply, it can charge the difference between the Advertising Mail price and the equivalent Business Mail price, plus its audit costs, and can suspend your access to Advertising Mail.
Unsorted vs sorted, and choosing a delivery speed
| Unsorted | Sorted (Low Sort) | |
|---|---|---|
| Minimum volume | 1,000 letters or 250 large letters, per class, per day, per site | 4,000 letters or 1,000 large letters |
| Delivery speeds | 1st Class or 2nd Class | 1st Class, 2nd Class, Economy or Economy deferred |
| Machine-readable options | Mailmark, Advanced (licence barcode) or Account | Low Sort Mailmark or Manual Low Sort |
| Typical user | Smaller mailings, often franked or printed with a barcode | Mailing houses sorting larger volumes to the lowest prices |
| Delivery speed | Royal Mail's aim |
|---|---|
| 1st Class | Next working day after posting |
| 2nd Class | Within three working days after posting |
| Economy | Within six working days after posting (sorted only) |
| Economy deferred | Within six working days after a date you choose, up to 28 days after posting (sorted only) |
For most marketing campaigns, Economy is the sensible choice: the saving over 2nd Class is significant and a few extra days rarely matters. Economy deferred is useful when you want a mailing to land around a launch or event date. Build the delivery window into your campaign plan so calls to action and offer dates line up.
Advertising Mail prices in 2026
| Letter, up to 100g (April 2026) | Advertising Mail | Business Mail |
|---|---|---|
| 2nd Class Standard Unsorted | 74.0p | 91.0p |
| 2nd Class Mailmark Unsorted (10,000+) | 42.9p | 69.5p |
| 2nd Class Low Sort Mailmark | 39.0p to 37.2p | 82.6p to 78.9p |
| Economy Low Sort Mailmark | 30.4p to 29.0p | 69.5p to 66.4p |
| Economy Manual Low Sort | 40.6p | 82.7p |
| 1st Class Low Sort Mailmark | 168.0p to 160.4p | 168.0p to 160.4p |
29.0p
Lowest Advertising Mail letter price: Economy Low Sort Mailmark, 80,000+ items per day
Source: Royal Mail, April 2026
56%
Saving of Advertising Mail over Business Mail on an Economy Low Sort Mailmark letter at 4,000–19,999 items (30.4p vs 69.5p)
Source: Calculated from Royal Mail April 2026 prices
Large letters cost more. An Economy Low Sort Mailmark large letter up to 100g was 44.7p–46.8p on the same rate card. Keeping a pack within letter size (for example a C5 or DL envelope) is one of the biggest postage savings available. See how much direct mail costs for print, data and enclosing costs on top of postage.
Mailmark sortation, handled in-house
As a Royal Mail Approved Mailing House with Mailmark accreditation, we sort, barcode and hand over your Advertising Mail at the best rate it qualifies for.
Explore the serviceWhere Mailmark fits in
Mailmark is Royal Mail's barcode for machine-readable mail. Each item carries a unique 2D or 4-state barcode holding information such as the sender, the recipient's postcode and the item's characteristics. Mailmark gives the lowest Advertising Mail prices, with fewer design constraints than older machine-readable options and reporting on each batch. Manual Low Sort is still available, but it costs more: 40.6p against 30.4p for an Economy letter at the lowest volume band. Our Mailmark guide explains how it works.
The data rules you must follow
- If your data is not consent-based, have a documented procedure for suppressing it against the Mailing Preference Service, including MPS deceased.
- Keep an internal suppression file of everyone who has asked not to receive your mailings.
- Check your mailing file against both within 30 days of posting.
- Make sure your mailing has a lawful basis under UK GDPR and PECR. Royal Mail's rules sit on top of data protection law, not instead of it.
- Keep records so you can show Royal Mail what was done if a posting is audited.
Our data processing team handles PAF validation, de-duplication, MPS and gone-away suppression as part of every mailing. For charities, our charity sector page explains how we support appeal and supporter mailings.
Royal Mail incentives
Royal Mail also runs incentives that give postage credit on qualifying Advertising Mail. Royal Mail Marketreach lists a First Time User Incentive for brands that have not used mail advertising in the past 24 months, with qualifying volumes of 4,000 Advertising Mail items or 10,000 partially addressed items, plus Test and Innovate and Advertising Growth incentives. Royal Mail renewed its incentives for 2026–27, with postage credit rates updated from 30 March 2026. It is not publishing a full incentive calendar for the year, so terms and windows change. Ask us to check what is open when you plan your campaign.
Sources
- Royal Mail – User Guide for Royal Mail Advertising Mail, April 2026 (archived copy)
- Royal Mail – Advertising Mail DM Message Content Guidance List, v21 (November 2023)
- Royal Mail – Retail Letters Price Guide, prices effective 7 April 2026 (archived copy)
- Royal Mail Wholesale – Renewing our incentives for 2026–27
- Royal Mail Marketreach – Mail incentives
