100Mb Leased Line UK 2026 Guide: Costs, Providers & Benefits Explained Quick answer: What Is a 100Mb Leased Line?
A 100Mb leased line is a dedicated, symmetrical 100Mbps internet connection that delivers guaranteed speeds, 99.9% uptime and ultra-reliable performance, so is great for businesses using cloud platforms, VoIP, or supporting 20-100 employees.
If you are seeking a fast, reliable, and dedicated internet connection, a 100Mb leased line can provide an excellent solution because it offers symmetrical speeds, ensuring both upload and download speeds of 100Mbps, perfect for businesses with high data demands.
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How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: August 2026
Leased Line Cost Calculator UK Estimate your monthly leased line cost, annual spend, total contract value and whether dedicated internet is likely to be worth comparing for your business.
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100Mbps bearer 1Gbps bearer 10Gbps bearer A larger bearer can make future speed upgrades easier.
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Standard office use VoIP, video calls and cloud software Heavy uploads, backups or large files Critical operations / cannot trade offline Enterprise, data-heavy or multi-site Higher usage may increase recommended resilience and speed.
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City / strong network availability Town / mixed availability Rural / limited availability Business park / complex install Leased line pricing is highly postcode-specific.
Contract length
12 months 24 months 36 months 60 months Longer contracts usually reduce the monthly price.
Resilience requirement
No extra resilience 4G/5G or broadband backup Diverse backup circuit Useful if downtime would stop trading.
SLA requirement
Standard business SLA Enhanced SLA / faster fix Critical SLA / maximum uptime focus Higher SLA expectations can affect provider choice.
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Contents
What is a 100Mb Leased Line?
100MB Leased Line Providers
Benefits of 100Mb Leased Lines
Average Costs of 100Mb Leased Lines
Factors Affecting Pricing
Who Should Consider a 100Mb Leased Line?
What is a 100Mb Leased Line? A 100Mb leased line is a dedicated, private internet connection that provides constant speeds of 100Mbps for both uploads and downloads. Unlike traditional broadband, leased lines do not share bandwidth with other users, ensuring consistent performance, high reliability, and minimal downtime.
This makes 100Mb leased lines ideal for businesses that rely on:
✔️ VoIP phone systems
✔️ Cloud-based applications (e.g., Microsoft 365, Google Drive, AWS, Azure)
✔️ Remote working & VPN access
✔️ Video conferencing & streaming
✔️ Large data transfers & backups
100MB Leased Line Providers
Benefits of 100Mb Leased Lines ✔️ Dedicated, Private Connection
Unlike broadband, a leased line is not shared with other users, ensuring stable and uninterrupted connectivity.
✔️ Symmetrical Upload & Download Speeds
A 100Mbps upload & download speed is ideal for businesses running cloud applications, VoIP, and large data transfers.
✔️ Enhanced Security & Reliability
Leased lines offer higher security as they don’t share bandwidth with other users, reducing cybersecurity risks and ensuring a stable, dedicated network.
✔️ Guaranteed Uptime with SLAs
Service Level Agreements (SLAs) typically guarantee 99.9%+ uptime with rapid response times for resolving any issues.
✔️ Scalability for Future Growth
As your business grows, 100Mb leased lines can be easily upgraded to 1Gbps or more, making them a long-term investment.
Average Costs of 100Mb Leased Lines The cost of a 100Mb leased line varies depending on several factors, but generally falls between:
💷 £150 – £600 per month
Location Typical Monthly Cost
London & Major Cities £150 – £300
Urban Areas £200 – £400
Suburban & Rural Areas £400 – £600
Factors Affecting Pricing 📍 1. Your business location
💡 Urban areas (London, Manchester, Birmingham, etc.) typically have lower costs due to better infrastructure.
💡 Rural locations may require additional installation fees for fibre deployment.
📄 2. Contract length
💡 Longer contracts (3-5 years) can offer cheaper monthly rates compared to shorter-term options.
📡 3. Type of connection & provider
💡 Major providers (BT, Virgin Media, Vodafone) offer competitive pricing, but alternative fibre networks (CityFibre, Zen Internet) can sometimes be cheaper.
⚙️ 4. Installation costs
💡 Some providers offer free installation, while others may charge £1,000+ for setup, depending on your premises’ infrastructure.
Who Should Consider a 100Mb Leased Line? We think that 100Mb leased line is ideal for businesses that require fast, reliable, and dedicated internet connectivity for critical operations.
✔️ They are ideal for:
✅ Medium-sized businesses (20-100 employees)
✅ Companies using cloud services & SaaS applications
✅ VoIP & remote working businesses
✅ Industries requiring high-security networks (finance, legal, healthcare, IT)
❌ They are probably not ideal for:
🚫 Small businesses with minimal internet usage (consider FTTP broadband instead)
Key Takeaways
100Mbps leased lines are fast, reliable and fully dedicated.
Costs range from £150–£600 per month depending on location.
Upload and download speeds are identical—perfect for cloud and remote work.
Provides strong security and 99.9%+ uptime SLAs.
Ideal for growth-focused SMEs and mid-market organisations.
FAQs 1. Is a 100Mb leased line fast enough for a business?
Yes. 100Mbps is ideal for most SMEs, supporting VoIP, cloud working and 20–100 employees without slowdowns.
2. How long does installation take?
Most leased line installations take 30–90 days, depending on fibre availability.
3. Is a leased line better than FTTP?
Yes, leased lines provide guaranteed speeds, higher reliability and symmetrical performance, while FTTP is shared and can fluctuate.
4. What contract length should I choose?
3–5 year contracts offer the best monthly rates and often include free installation.
5. Can I upgrade from 100Mb later?
Absolutely. A leased line can be upgraded to 200Mb, 500Mb or 1Gb easily.
6. Does weather affect leased lines?
No. Fibre lines run underground, so weather has virtually no impact.
7. Do leased lines include static IPs?
Yes, most providers include multiple static IP addresses as standard.
Here is a Handy Youtube Video About 100MB Leased Lines
100MB Leased Line – Other useful links about leased lines include: Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
