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Three contracts, one front door.
A UK Home Purchase Plan is not a mortgage with Arabic in the recital. It is a partnership, a lease, and a series of sales stacked onto English land. If any layer is fake, the name is decoration.
The Mizan desk · 7 September 2026 · 12 min
Diminishing musharakah, the workhorse of British Islamic home finance, is three legal events wearing one monthly debit.
First: you and the bank buy the house together. Your deposit is your initial share. The bank’s share is everything else. That purchase must be real. Title, or a beneficial interest English land law will recognise, has to move. A ‘facility’ that never takes the brick is a loan.
If ‘rent’ is only interest on outstanding principal and you never co-own, you have bought a loan that learned to say musharakah.
The lease on their share
Second: you live in the whole house, including the part you do not yet own. For that usage you pay rent on the bank’s share. Rent is for usufruct of an asset the lessor still owns. If the rent formula is indistinguishable from a SONIA-plus margin on a declining principal, the scholar’s job is to ask whether the lease is still a lease or a coupon.
AAOIFI and the UK boards permit a rent that is benchmarked to a conventional rate so long as the underlying is still occupancy of an owned share. Benchmarking is not the sin. Owning nothing is.
Buying the rest
Third: on a schedule, you buy extra units of the bank’s share. Each unit is a sale at a disclosed price. Over 25 years the bank’s share falls to zero. Early settlement is a purchase of remaining units, not a redemption of a loan — the price of those units is where a lot of ‘Islamic’ products quietly rebuild an early-repayment charge.
Miss this and you will sign a document that amortises like a mortgage, defaults like a mortgage, and is explained at the kitchen table as ‘just like a mortgage but halal’. The kitchen-table version is how the sameness charge on X gets its 2,000 views. The documents are how you answer it.
What to open, in order
The facility letter. The co-ownership or declaration of trust. The lease or occupational licence. The unit-purchase mechanism. The late-payment clause. The insurance clause. The default and sale clause. The early-settlement schedule. If your solicitor cannot put those eight on one page, you do not have a Home Purchase Plan. You have a mortgage that learned marketing.