Scarlet fibre: what is Proximus's low-cost fibre worth in Belgium?

Scarlet makes a simple case: Proximus's fibre network, but cheaper. From €34/month for 100 Mbps, the low-cost brand of the Proximus group targets households that want a solid connection without paying for options they never use. Behind that price is a useful fact: it's the same network as Proximus, with the same coverage, and a simplified line-up. Here is our review, with July 2026 figures.

What is Scarlet and which network does its fibre use?

Scarlet is Proximus's low-cost brand. In practice, it's the same group and above all the same infrastructure: Scarlet fibre runs on the Proximus FTTH network, exactly like a Proximus subscription. What changes isn't the quality of the pipe, but the commercial packaging. Scarlet sells stripped-down deals — fewer options, a simpler TV line-up, mostly online service — in exchange for a lower rate. For the user, that means a connection technically identical to Proximus, but cheaper as long as you don't need the parent company's premium services.

How much does Scarlet fibre cost in 2026?

Scarlet fibre starts at €34/month for 100 Mbps (recorded July 2026). For more speed, the Fiber Boost option raises the connection to 300 Mbps for €10/month more, about €44/month. Good to know: Scarlet has in the past increased these speeds without touching the price — unlimited internet went from 70 to 100 Mbps, and Fiber Boost from 200 to 300 Mbps, at the same rate. On promotions, installation and activation are free for online orders until 2 August 2026, which lightens the upfront bill. As always, check the displayed price when you subscribe: rates and promos shift from month to month.

What speed does Scarlet fibre offer — 100 or 300 Mbps?

Two tiers: 100 Mbps as standard, or 300 Mbps with the Fiber Boost option. For the vast majority of households, 100 Mbps is more than enough: 4K streaming on several screens, video calls, remote work and online gaming all run smoothly, even with several people connected at once. Moving to 300 Mbps only makes real sense if you run many active devices simultaneously or often download and upload large files. One thing to watch in the small print: the upload speed of entry deals stays more modest than the download — check the exact figure if you do a lot of video calls or cloud backup. To place these speeds against other providers, our ranking of the best fibre internet deals in Belgium gives each player's speed-to-price ratio.

Is Scarlet fibre available at your address?

Its fibre coverage is identical to Proximus's, since it's the same FTTH network. That's good news: Proximus's fibre network is one of the most extensive in Belgium and keeps growing. But eligibility remains an exact-address matter: two neighbouring streets can have different status. So before comparing prices, test your eligibility at your address, on Scarlet's site or on Proximus's (the result is the same). If fibre isn't laid at your place yet, Scarlet also offers VDSL — slower but more widely available, and not to be confused with true fibre.

Should you choose internet-only or a Trio bundle?

It depends on how you use television. Internet-only, Scarlet fibre is hard to beat for a household that mostly streams (Netflix, Disney+, online channels) and doesn't need a set-top box. But it's on the Trio bundles (internet + TV + phone) that Scarlet hits hardest: from €42/month, they rank among the cheapest bundles in Belgium combining unlimited internet, digital TV via a box and a landline, with a Trio Mobile version around €50/month. According to price comparisons, a household can save several hundred euros a year versus the big providers. The trade-off: a more limited TV line-up and options than Proximus. If you want every premium channel and top-tier service, the Scarlet bundle will quickly show its limits.

Is there a contract and any hidden price hikes?

Scarlet highlights no-commitment plans, which avoids being stuck paying for a service you no longer use. That's a real advantage over 12- or 24-month contract deals. On price hikes, the brand has a fairly good reputation — it raised speeds without touching rates — but no Belgian telecom deal is fully safe from an annual indexation. The right approach: read the terms line by line when you subscribe, note the exact price, duration and any fees, and compare the total cost over two years rather than the entry rate alone.

Who is Scarlet fibre really for?

Scarlet is spot-on for a specific profile: a household covered by Proximus fibre that wants the essentials at a fair price and can skip premium options. Want reliable fibre, 100 or 300 Mbps, without paying the Proximus price? It's exactly for you. Looking for the cheapest possible internet + TV + phone bundle? Scarlet's Trio deals are hard to beat. Conversely, if you want the fullest TV line-up, premium customer service or multi-gigabit, look at Proximus directly (see our full Proximus fibre review) or compare the whole market. To see which deal covers your area and at what real price, our ranking of the best fibre internet deals in Belgium sorts it out.

Conclusion

Scarlet keeps its promise: Proximus's fibre network, same coverage, for less. Its strengths are internet-only from €34/month and, above all, Trio bundles among the most affordable in the country. Its limits — fewer options and a smaller TV line-up — only bother households that are demanding on TV and service. The right method stays the same: test your eligibility for Proximus fibre at your address first, then compare the total cost over two years, bundle or internet-only, against the other deals in your area.