Last updated: Monday 21 September 2026 (Europe/London).
Next update: when BT reprints the Full Fibre 900 deals / affiliate-offers tile or the invitation-only leaving-fees Switch Credit terms change on bt.com help.
By: Switch Editorial Team, Switch Squid Ltd
Sources re-verified today: Deal Research retailer-verified Full Fibre 900 on bt.com/broadband/deals (£31.99/mo 24m; £41.99 month 1; £35.99 from Mar 2027; £39.99 from Mar 2028); BT Switching Credit help (invitation-only for any BT Broadband package — broadband-only ETF cap £200; claim via bt-switchteam@bt.com within 4 months); Nest product 470881 = AFF-FF-900-PC → bt.com/broadband/affiliate-offers (a=911601, m=3041). No alternate Nest pclick is assigned to this guide — do not invent one.
As of 21 September 2026, BT Full Fibre 900 prices at £31.99 a month on a 24-month residential contract after a £41.99 first month, then rises to £35.99 from March 2027 and £39.99 from March 2028, plus an invitation-only “up to £200 leaving fees” bill credit if you qualify and claim correctly. There is no retailer end date on the Deal Research verification for this tile — SwitchSquid will not invent a cliff. Soft context on the broadband hub is fine; Get deal buttons use Nest 470881 only (Awin merchant 3041, affiliate 911601).
Affiliate honesty / P0 correction: Nest 470881 is package AFF-FF-900-PC (Full Fibre 900) — not a different speed tier. This guide was previously mislabelled; it is corrected to FF900 with retailer-verified pricing. Uses 470881 only — never Nest 470909 or any invented BT pclicks. Leaving-fee language is invitation-only; do not treat the £200 as a guaranteed cashback for every postcode.
£200 leaving-fees claim (kept): Re-checked BT Switching Credit help on 21 Sep 2026 — the offer is invitation-only for new customers signing up to any BT Broadband or Broadband and TV package, not locked to a different speed tier. Broadband-only → Broadband-only is capped at £200 on the eligibility table. A deals-page hero may have featured “up to £200” on a different speed-tier card; the help T&Cs still cover FF900 when your journey shows Switch Credit. If your invitation does not include Switch Credit, model cash without the £200.
Check BT Full Fibre 900 on the affiliate offers path (Nest 470881) →
Deal maths at a glance (verified 21 Sep 2026)
| Item | What Deal Research / retailer copy shows | SwitchSquid note |
|---|---|---|
| Plan | BT Full Fibre 900 (Openreach FTTP ~900 Mbps class) | Confirm average/guaranteed speeds on your order summary |
| Monthly (ongoing) | £31.99/mo on 24 months | After month 1; not “£31.99 flat forever” |
| Month 1 | £41.99 | Include in Year-1 cash |
| March 2027 | £35.99/mo | In-contract step-up |
| March 2028 | £39.99/mo | In-contract step-up |
| Setup | Confirm on live order summary | Do not invent £0 or £10 — trust the journey |
| Leaving fees credit | Up to £200 bill credit (broadband-only row) | Invitation-only; any BT Broadband per help T&Cs — claim rules below |
| Claim channel | bt-switchteam@bt.com within 4 months of BT activation | Paid final bill + BT order number; ETF only |
| Retailer end date | None published on the verified tile | Do not invent a cliff; re-check affiliate-offers before you resign another ISP |
| Nest CTA | 470881 only (AFF-FF-900-PC) | a=911601, m=3041 — never invent another BT Nest CTA |
Year-1 cash ballpark before leaving-fee credit (illustrative, activation before March 2027 rise): £41.99 (month 1) + (11 × £31.99) = £393.88, then add any live setup fee shown on the order summary and adjust if a March 2027 step falls inside your first twelve months. Do not market “£31.99 flat for 24 months” — month-1 pricing and March rises are part of the published path. Subtract any validated Switch Credit only after BT posts it to your bill (up to £200 for broadband-only ETF patterns on the help table).
Invitation-only leaving fees — read this before you celebrate £200
BT’s Switching Credit help page is explicit: the Switch Offer is invitation only for new BT Broadband customers signing up to any BT Broadband or Broadband and TV package — that includes Full Fibre 900. The headline “up to £200” for broadband-only early termination charges is a maximum bill credit, not a voucher that arrives in your bank. If your invitation does not include Switch Credit, assume £0 leaving-fee help until BT’s order journey or welcome pack says otherwise.
How to claim (from BT help, re-checked 21 Sep 2026):
- Confirm you are allowed to leave your current provider and that you have an invitation / Switch Credit language on the path you ordered.
- Order and activate BT Broadband via the Nest 470881 affiliate-offers CTA above (AFF-FF-900-PC / Full Fibre 900).
- Email your paid final bill to bt-switchteam@bt.com within 4 months of BT activation. Put your BT order number in the subject. Attach a bill that shows your address (must match the BT account) and a clear breakdown of early termination / one-off charges.
- BT says processing starts 14 days after activation (after cooling-off). Validated credit is added to your BT bill within 28 days of receiving a correct claim. It covers early termination charges only — not excess data, call charges, or mobile broadband ETFs.
Eligibility hard stops (help page): cancel within 14 days of activation; miss the 4-month window; BT Group employee; termination charges from BT / EE / Plusnet / business broadband; TV-only switches that the eligibility table marks not eligible. Broadband-only → Broadband-only is capped at £200. Broadband+TV → Broadband+TV can go to £300 on the help table — this FF900 SEO guide’s Deal Research framing is the up to £200 broadband leaving-fees row, so do not oversell £300 unless your live invitation and package match that row.
Who Full Fibre 900 is for (and who should skip)
Buy FF900 if: your Openreach FTTP address checker shows Full Fibre 900 available; you run heavy multi-device WFH, 4K/8K streams, cloud backups and consoles at once; you want a national Openreach footprint rather than a narrow altnet postcode; your current ISP exit fee is real and you have Switch Credit invitation language; you can absorb month-1 £41.99 plus March 2027/2028 step-ups inside a 24-month plan.
Skip or price a rival if: you only need ~100–500 Mbps for lighter use (lower-speed cash options may win on monthly maths); an altnet (YouFibre / toob / CityFibre ISP) is live at a materially lower fixed promo with free install; you refuse any invitation-gated leaving-fee process; you need a 12-month or rolling exit; your ETF is from BT/EE/Plusnet (not covered).
Soft context only: YouFibre’s September 2026 promo and toob’s CityFibre golden ticket are separate cliff-dated altnet stories on SwitchSquid — they are not Openreach FF900 substitutes for every postcode. Run BT’s address checker via Nest 470881 before you resign Virgin, Sky, TalkTalk or another Openreach ISP.
Cash vs common mid-tier / gigabit patterns (illustrative, 21 Sep 2026)
| Path | Headline pattern | Year-1 cash ballpark* | Catch |
|---|---|---|---|
| BT Full Fibre 900 (this guide) | £41.99 mo1 → £31.99; Mar £35.99 / £39.99 | ~£394 before setup/credit; − up to £200 if invitation validates | Invitation-only credit; no invented end date; Nest = FF900 |
| YouFibre YOU 1000 Sep promo | £25 fixed 24m; free standard install | £300 | Altnet only; ends 30 Sep 2026; Impact/SEO CTAs |
| toob home900 golden ticket | £20→£22→£24; £0 install | activation-month dependent | CityFibre net-new only; ends 30 Sep 2026 23:59 |
| Other Openreach FTTP ~900 | often £30–£40 intro | varies | Watch setup, rises, reward cards |
*Illustrative public-tile maths — always re-open the Nest 470881 affiliate-offers journey and your rival’s checkout the day you order. Altnet cliffs are dated; this BT tile is not.
Switching steps (25-minute path)
- Screenshot your current ISP exit fee estimate (remaining months × monthly, or the provider’s ETF quote).
- Click Nest 470881 / the affiliate-offers CTA; run your postcode for Full Fibre 900 (AFF-FF-900-PC).
- Confirm £41.99 month 1, £31.99 ongoing, and the March 2027 (£35.99) / March 2028 (£39.99) rise dates on the order summary — plus any setup fee shown live.
- Look for Switch Credit / leaving-fees invitation language. If absent, model cash without the £200.
- Complete One Touch Switch details for the losing provider — do not cancel early in a way that creates a double-pay gap.
- After activation, email bt-switchteam@bt.com with order number + paid final bill within 4 months; calendar a 28-day check for the bill credit.
- Calendar month 22 for post-term planning and both March rise months so the step-ups are not a surprise.
Decision tree (print beside the postcode box)
If Full Fibre 900 is not available at your address → stop; price a lower FF tier / FTTC / cable / altnet instead.
If the journey shows FF900 at £41.99 mo1 → £31.99 with March rises and Switch Credit invitation → proceed; screenshot everything.
If the journey shows a different monthly or setup → trust the live summary, not this article’s Deal Research snapshot.
If there is no invitation / Switch Credit language → still fine to buy on monthly maths alone; do not bank the £200.
If your ETF is from BT, EE or Plusnet → leaving-fees credit will not apply per help exclusions.
If an altnet promo is cheaper and live to your address with a dated cliff → compare Year-1 cash honestly before you lock 24 months on Openreach.
How SwitchSquid verified this (E-E-A-T)
Deal Research retailer-verified the FF900 £31.99 / 24m path (£41.99 month 1; £35.99 Mar 2027; £39.99 Mar 2028) on bt.com/broadband/deals and the “up to £200 leaving fees” invitation framing on 21 September 2026 (Europe/London). We re-opened BT’s Switching Credit help page the same day — terms apply to any BT Broadband package (not speed-tier locked), so the £200 broadband-only claim is kept on this FF900 post with the invitation caveat. Nest product 470881 was confirmed status=1 as Full Fibre 900 / AFF-FF-900-PC with deepLink Awin m=3041 a=911601; Deals confirmed conversion healthy to bt.com/broadband/affiliate-offers. No alternate Nest pclick is assigned to this guide. SwitchSquid is operated by Switch Squid Ltd. We deliberately omit Nest 470909 and any other BT Nest IDs on this page.
Audience: UK households on or near Openreach full fibre who need ~900 Mbps class speeds, are mid-contract elsewhere, and need an honest invitation-gated leaving-fee story — not business broadband, not EE mobile-only, not prize-winner competition paths unless competition terms say Switch applies.
Risks and honest caveats
No retailer end date means the tile can change overnight without a public countdown — re-check Nest 470881 before you give notice. Invitation-only Switch Credit fails silently if you assume every new BT order qualifies. Month-1 £41.99 and March rises reduce the “£31.99 forever” marketing illusion. Average 900 Mbps class speeds are not a Wi‑Fi guarantee to every room. One Touch Switch still needs your accurate losing-provider details. Nest 470881 is Full Fibre 900 (AFF-FF-900-PC) — always trust the live order summary for the FF900 SKU you actually select; never invent another Nest CTA.
Affiliate disclosure: Get deal CTAs use Nest 470881 / Awin merchant 3041 for publisher 911601. SwitchSquid may earn a commission if you buy. Leaving-fees credit is paid by BT as a bill credit when your invitation and claim validate — it is not SwitchSquid cash.
FAQ
| Question | Answer (21 Sep 2026) |
|---|---|
| What is the BT Full Fibre 900 price in this guide? | £31.99/mo on a 24-month contract after £41.99 month 1, rising to £35.99 in March 2027 and £39.99 in March 2028 — confirm setup and live path on the order summary. |
| Is this Full Fibre 500? | No. Nest 470881 is AFF-FF-900-PC (Full Fibre 900). This guide is for Full Fibre 900 only. |
| Is there an offer end date? | No retailer end date was published on the Deal Research verification. We will not invent one. Re-check affiliate-offers / Nest 470881 before you resign another ISP. |
| Does the £200 leaving-fees credit apply to FF900? | Yes, when invitation-only Switch Credit is on your path. BT help covers any BT Broadband package; broadband-only ETF cap is £200. Kept after T&Cs re-check — not speed-tier locked. |
| What is the leaving-fees offer? | Invitation-only Switch Credit: up to £200 bill credit toward eligible broadband early termination charges when your invitation and claim validate. |
| How do I claim? | Email bt-switchteam@bt.com within 4 months of BT activation with your BT order number in the subject and a paid final bill showing ETF breakdown and matching address. |
| Is the £200 guaranteed? | No. It is invitation-only, capped, ETF-only, and subject to BT validation. Model cash without it unless your journey shows Switch Credit. |
| Which Nest ID should I use? | 470881 only (AFF-FF-900-PC / Full Fibre 900, a=911601, m=3041). Do not use 470909. Never invent another Nest CTA. |
| Does One Touch Switch still apply? | Yes for UK ISP switches — keep both references until the gaining provider confirms. Do not cancel early. |
| What if my ETF is higher than £200? | You pay the remainder. Credit is the lower of your eligible ETF or the cap on your invitation / help-table row. |
Prices and invitation-only Switch Credit can change without a public cliff date. Primary CTAs = Nest 470881 only (never 470909; never invent another Nest CTA). Always re-check the affiliate-offers order summary and bt.com Switching Credit help before you resign another ISP.
