Mortgage broker SIC codes usually mean 66190, activities auxiliary to financial intermediation, which has 10,513 active companies. That code is much broader than mortgages. The trap is 64922, activities of mortgage finance companies, as those are lenders and not brokers. The FCA’s register is a far better test.
Results Driven Marketing (RD Marketing) wrote this guide for suppliers who sell to mortgage brokers. We sell B2B data, so we have an interest in the subject. To keep it useful, we link our sources and show where a SIC search falls short. For the basics, read what an SIC code is.
Written by Iain Irvin, Director of RD Marketing. Iain worked in telesales, business development and sales management before starting the business, and has more than 15 years of experience in B2B marketing data and lead generation. Codes, counts and sources checked on 7 November 2026.
Contents
- Mortgage Broker SIC Codes Compared
- Mortgage Broker SIC Codes Against the FCA Register
- Mortgage Broker SIC Codes Under SIC 2026
- Where Mortgage Broker SIC Codes Fall Short
- Using Mortgage Broker SIC Codes to Build a List
- RD Marketing Services That Can Help
- How We Checked This
- Frequently Asked Questions
- Talk to Us
Mortgage Broker SIC Codes Compared
Do not add the counts together, because a company can list up to four codes.
| SIC code | Companies House description | Active companies | SIC 2026 code | What to know |
|---|---|---|---|---|
| 66190 | Activities auxiliary to financial intermediation n.e.c. | 10,513 | 66.19, 66.30 | Brokers and other financial support |
| 64922 | Activities of mortgage finance companies | 5,477 | 64.95/2 | Mortgage lenders, not brokers |
| 66220 | Activities of insurance agents and brokers | 8,542 | 66.22 | Insurance brokers, often the same firms |
| 66300 | Fund management activities | 5,660 | 66.30 | Fund management |
Mortgage Broker SIC Codes Against the FCA Register
The FCA says nearly all financial services activities in the UK must be authorised or registered, and its Financial Services Register lists the firms and individuals involved. Mortgage advice is a regulated activity, so the register shows permissions, which is something a code cannot do. Many advisers also work as appointed representatives of a larger firm, so the person you want may not be the company holding the authorisation.
Mortgage Broker SIC Codes Under SIC 2026
The Office for National Statistics finalised UK SIC 2026 in April 2026. 66.19 stays, but can also map to 66.30, fund management activities. Mortgage finance at 64.92/2 moves to 64.95/2, so saved lender filters need updating. You can read more in our UK SIC 2026 research.
Where Mortgage Broker SIC Codes Fall Short
- Sole traders and networks. Self-employed advisers may trade under a network’s authorisation.
- A broad code. 66190 covers many financial support businesses that never touch mortgages.
- Mixed firms. Many brokers may sell insurance as well.
Using Mortgage Broker SIC Codes to Build a List
- Start with permissions. Use the FCA register to confirm what a firm can do.
- Separate directly authorised firms from representatives. They may buy differently.
- Add size. A sole adviser and a large brokerage have different needs.
- Test a sample. Check 50 records against the register.
See our mortgage brokers data and lead generation for commercial mortgage brokers.
RD Marketing Services That Can Help
Once you know which codes and audiences you need, these pages explain how we can help you reach them.
- B2B data provider: who we are and what we supply.
- B2B database: our main page for buying UK business data.
- Telemarketing lists for sale: phone data for outbound sales teams.
- Buy B2B email database: business email data for your campaigns.
- Direct mail lists: postal data for letters and mailshots.
- LinkedIn automation: managed outreach to decision-makers on LinkedIn.
- Automated email campaigns: email campaigns run and followed up for you.
How We Checked This
Company counts come from Companies House advanced search, using the active status filter and one code at a time, on 7 November 2026. Descriptions come from the Companies House SIC code list. SIC 2026 codes come from the ONS correspondence table, dated 3 August 2026. A correspondence shows where a code could go. It does not tell you how any one company will be recoded. Register details come from the FCA.
Frequently Asked Questions
What is the SIC code for a mortgage broker?
Most use 66190, activities auxiliary to financial intermediation not elsewhere classified. Some also list 66220 if they sell insurance.
What is SIC code 64922?
It covers activities of mortgage finance companies, which means lenders and not brokers.
How can I check a mortgage broker is authorised?
Use the FCA’s Financial Services Register, which lists authorised firms and individuals.
What is the SIC code for a financial adviser?
Many use 66190, and some use 70221. The FCA register is a better way to confirm what they do.
Talk to Us
Need to reach mortgage brokers? Tell us who you want to reach, and we will send you a free audience count and quote within 24 hours, along with a sample.
Contact RD Marketing today to discuss your target market.