Buy to Let Mortgages vs Bridging Loans

A buy to let mortgage is long-term finance on a lettable property, assessed on rent and repaid over many years; a bridging loan is short-term finance, assessed on value and exit, repaid within months by a sale or refinance.

Buy to let is much cheaper to hold, with an annual rate and long term; bridging is charged monthly at a higher rate with fees each time. Bridging is worthwhile only for short periods where speed or condition justifies it.

Use a bridging loan when the purchase must complete quickly, such as at auction, when the property is unmortgageable because of condition or lease, or when you plan to refurbish and sell rather than hold.

Use a buy to let mortgage when the property is habitable and lettable, you plan to hold it long term, and the rent passes the lender's stress test. It is the cheaper long-term option.

Bridging loans can be used on properties that mortgage lenders decline, such as homes without a kitchen or bathroom, with structural issues or short leases, because bridging lenders assess value and exit rather than immediate lettability.

Bridging can complete in days to a few weeks; a buy to let mortgage usually takes several weeks, depending on valuation, underwriting and legal work. The auction contract sets the deadline; finance must be checked before bidding.

Buying at auction with a buy to let mortgage is risky because the 28-day completion may not be met, so buyers may consider a bridge followed by a buy to let refinance if a term mortgage cannot be arranged in time.

Buy to let lenders assess rental cover at a stressed interest rate. The PRA’s SS13/16 applies to banks and building societies, with group expectations for related lenders; other lenders set their own criteria. In comparison, bridging lenders assess the property's value and the realism of the exit.

Bridging loans usually have no long early repayment charges, though some have minimum interest periods or exit fees. Buy to let fixed rates commonly carry early repayment charges during the fixed period.

Some bridging lenders allow a property to be let during the term, others do not; letting is usually part of preparing for a buy to let refinance. The bridge agreement sets out what is permitted.

Bridging rates are quoted monthly because loans are short and often repaid within months. The monthly rate, fees and term together give the total cost, which is the fair comparison with a buy to let mortgage.

Over a long period, yes; over a short period on the right property, bridging can produce a better outcome by securing a discounted purchase or enabling value-adding works that a buy to let mortgage could not fund.

Bridging loans usually charge an arrangement fee, valuation and legal fees, and sometimes an exit fee. Buy to let mortgages typically charge an arrangement fee and valuation, with legal costs often lower.

Bridge to let is using a bridging loan to buy and improve a property, then refinancing onto a buy to let mortgage once it is lettable. Some lenders offer both as a combined product.

Planning the buy to let exit before buying — identifying a lender, its valuation basis, ownership rules and rental test — is essential, because the bridge is only as good as the refinance behind it.

Some lenders offer bridge-to-let products, providing the bridge and pre-agreeing the buy to let mortgage, which can simplify the exit. Comparing them with separate bridge and buy to let options shows the best overall cost.

Long enough to complete the works, let the property and meet the buy to let lender's ownership rules, often six months or more, but no longer, because bridging interest accrues monthly.

If the buy to let lender's valuation or rental test supports less than the bridge redemption, you need cash to cover the gap, a different lender, an extension, or a sale. Testing both value and rent early reduces this risk.

Portfolio landlords use bridges for quick or unmortgageable purchases, then refinance into their buy to let portfolio, where the lender assesses the whole portfolio under the Prudential Regulation Authority's (PRA) rules.

For a first rental that is ready to let, a buy to let mortgage is usually right. A bridge suits only if the property needs work first, must complete very quickly, or is otherwise unmortgageable.