Top 10 Lenders for £850,000 Buy-to-Let Business Finance in 2026

Overview: Funding in as little as five days helps portfolio landlords secure properties where a slow completion would lose the deal. One Stop Business Finance lends against property security through term loans and bridging facilities. For an £850,000 buy-to-let purchase, the monthly interest structure suits investors planning a refinance or quick exit rather than a long-term hold.

Overview: Monthly rates from 1.05% position Inhale Capital among the more competitively priced bridging lenders for property investors. The facility range reaches £2,000,000, and funding decisions can come within 24 hours. For limited company landlords at the £850,000 level, this gives a fast route to completion when auction deadlines or chain breaks demand urgency.

Overview: An annual interest model starting from 5% makes Brightstar a candidate for investors comparing cost against monthly-rate bridging lenders. The facility range begins at £50,000 and extends comfortably into seven figures. At the £850,000 mark, the annual rate structure can suit landlords planning a longer refinance window rather than a three-month bridge.

Overview: NatWest underwrites commercial mortgages with the rigour of a high-street bank, which means portfolio landlords with clean accounts and strong rental cover can access some of the most stable long-term rates on the market. Its lending range reaches £10,000,000, and limited company buy-to-let applications are standard practice. Expect a full affordability assessment and a longer underwriting timeline than specialist lenders.

Overview: A lending floor of £30,000 and a ceiling of £10,000,000 means Virgin Money can serve portfolio landlords from single-property limited companies through to multi-million-pound portfolios. The commercial mortgage product accepts buy-to-let applications from SPVs and trading limited companies alike. Annual rates start at 4.5%, though risk pricing varies with loan-to-value and rental cover strength.

Overview: Barclays brings its business mortgage product to buy-to-let limited companies, with a lending ceiling of £25,000,000 that dwarfs most portfolio requirements. The annual rate band of 8.5% to 14.9% reflects a risk-priced approach. At £850,000, the product can accommodate borrowers whose profiles do not fit the tightest high-street criteria.

Overview: Offa's buy-to-let product is purpose-built, so underwriting centres on rental income and portfolio performance rather than adapting a general commercial facility. Annual rates run from 5.9% to 7.5%, and an initial decision can arrive within an hour. For limited company landlords at the £850,000 level, the product alignment removes the friction of a lender that treats BTL as a sideline.

Overview: Together Money runs a dedicated buy-to-let mortgage line with one of the widest lending ranges available, from £50,000 to £25,000,000. Monthly rates between 0.55% and 1.5% suit short to medium-term holds. Underwriting leans more on property asset value than conventional income multiples, which helps limited company landlords with uneven personal income profiles at the £850,000 level.

Overview: Annual rates from 5.5% and a funding turnaround as quick as four hours give Admiral leasing a dual appeal for buy-to-let investors who need speed without defaulting to monthly bridging pricing. The commercial mortgage product handles limited company applications as standard. At £850,000, the annual rate structure keeps borrowing costs predictable across the facility term.

Overview: MT Finance structures property-backed facilities with monthly rates from 0.89%, targeting investors who need certainty of funding within 24 hours. The lending range spans £50,000 to £10,000,000. For limited company landlords at the £850,000 mark, underwriting prioritises the property asset and exit plan over exhaustive personal income verification.