Can You Refinance a Conventional Mortgage Into a UK Islamic Mortgage? Selling Your Own House to the Bank and the 'Inah Question: A Sharia Analysis for Muslim Investors (2026)

Verdict: On a Gatehouse refinance you sell a share of your own house to the bank, rent it back and buy it back in stages. AAOIFI permits an asset to be bought from a party and leased back to that party. Where the lease ends in a sale back, AAOIFI requires a reasonable period to pass first. No source read says whether that applies to monthly buy-backs, so the question is open. Refinancing by murabahah, a sale at cost plus profit, on a house you already own is barred.

Gatehouse Bank's home purchase plan FAQ says the product can be used "just like a conventional mortgage to buy or refinance your home". Its product guide, effective 4 September 2026, lists a refinance range with no application fee and no product fee.

Al Rayan Bank offers a different structure. Its Premier Home Finance page lists an "Option to refinance from a conventional mortgage or another Islamic finance provider". The structure is "Commodity Murabaha (Tawarruq)", a credit sale followed by a cash sale, and the product is open to applicants from five Gulf states.

Whether home purchase plans are halal at all is the subject of the analysis of UK home purchase plans. Charges for leaving an Islamic plan early are covered in the analysis of early settlement. This article asks a narrower question: what changes in Shari'ah when the house the bank buys already belongs to you?

What Refinancing Actually Is

Refinancing means replacing one home loan with another on the same house. Here the new finance is a home purchase plan, the UK name for an Islamic mortgage alternative. Gatehouse uses diminishing musharakah, a partnership in which one partner buys out the other in stages.

The Gatehouse solicitors' handbook states that "legal title to the property is transferred to the Bank (from either the seller or the Client)". On a refinance, the client is the seller. Then "The Bank will simultaneously grant a lease to the Client". The customer pays rent for the bank's share and makes monthly acquisition payments, which buy back units of it.

The bank's money goes to the conventional lender. The redemption figure is the sum that clears the old loan on the day. On a refinance, the Gatehouse criteria state, "the applicant's contribution is the equity in the property". Equity is the value of the house less the debt on it.

A worked example

Take a house valued at £400,000, with a conventional redemption figure of £240,000. Gatehouse pays £240,000 for its share. FTV, or finance to value, is the bank's contribution as a share of value. Here it is £240,000 divided by £400,000, which is 60 percent.

The customer's contribution is £400,000 minus £240,000, which is £160,000, or 40 percent. It comes in as equity, not cash.

At 60 percent, the plan sits inside Gatehouse's 65 percent band. The five year refinance fix in that band is 5.63 percent. In the 80 percent band it is 5.76 percent. The ceiling of the 65 percent band is 0.65 times £400,000, which is £260,000. A redemption figure above £260,000 would move the plan into the higher band.

The handbook calls each acquisition payment "a payment towards the Purchase Cost (being the Bank's Contribution)". So the customer buys the bank's share back for £240,000 in total. The bank paid £240,000 and receives £240,000, a difference of £0. The bank's return comes as rent, not as a higher price.

Stamp duty land tax (SDLT) is the tax on buying land in England and Northern Ireland. The Finance Act 2003, section 71A(2)(a), exempts the bank's purchase where the seller is the customer. The Gatehouse handbook confirms: "On a refinance, all three stages (i) to (iii) are exempt from SDLT". The SDLT in the example is £0.

The Property Question

Does the bank buy anything real? The handbook says the bank "becomes the registered proprietor of the Property". Beneficially, the property "will be held in shares by both the Bank and the Client". A beneficial share is a right to part of the value. What that title means if a customer dies is covered in the analysis of death and joint ownership.

The customer sells an undivided share, a fraction of the whole house without a dividing line. Mufti Taqi Usmani, in An Introduction to Islamic Finance (1998, p. 60), writes: "If the undivided share relates to both land and building, the sale of both is allowed according to all the Islamic schools." He reports a difference of opinion only where a share of the building alone is sold to a third party. His context is the client buying the financier's units. Applying it to the customer's sale is this article's inference.

The customer's side differs too. In a purchase, the customer pays a cash deposit. In a refinance, the customer contributes a share of a house already owned.

AAOIFI Shari'ah Standard No. 12 on Sharikah (issued 16 May 2002), clause 5/4, allows this. Its second sentence opens: "The contribution may be in the form of cash or tangible assets that can be translated into a monetary value". The clause continues with examples and a rule on losses. Clause 3/1/2/1 requires "the agreement of all partners" and a value "expressed in currency". The bank's valuation does that job.

AAOIFI's appendix calls this "the view of the Maliki and the Hanbali scholars". Usmani (p. 25) records that "Imam Abu Hanifah and Imam Ahmad are of the view that no contribution in kind is acceptable in a musharakah." He concludes (p. 27) that Imam Malik's view "can be acted upon."

Usmani (p. 59) also frames the house plan as shirkat al-milk, co-ownership without a business contract. On that reading, co-ownership begins when the bank buys its share, and capital rules may not apply. This too is this article's inference.

The Riba Question

Riba is a return charged on a loan, and it is forbidden. The reason to refinance is to stop paying it. Surah Al-Baqarah, verse 278, reads:

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ ٱتَّقُواْ ٱللَّهَ وَذَرُواْ مَا بَقِيَ مِنَ ٱلرِّبَوٰٓاْ إِن كُنتُم مُّؤۡمِنِينَ

"O you who have believed, fear Allāh and give up what remains [due to you] of interest, if you should be believers." (Saheeh International)

The translator's bracket, "[due to you]", reads the verse as addressed to lenders. Sheikh Joe Bradford, in "Is it Forbidden to Pay Riba?" (joebradford.net, 2022), reads it more widely: "this verse includes both creditors and debtors." He quotes a hadith from Sahih Muslim in his own rendering: "Allah has cursed the one who devours Riba, the one who feeds it to him, the one who transcribes it as well as the two who witness it." The borrower is the one who feeds it.

The risk lies in the exit itself. A sale and buy-back between the same two parties can hide a loan. The classical name is bay' al-'inah. Mufti Faraz Adam, in "The Fiqh of Hiyal" (darulfiqh.com, 2024), defines it: "In Bayʿ al-ʿĪnah, the seller sells an asset to a buyer on a deferred basis with a mark-up, and thereafter, the initial seller immediately repurchases the asset from the initial buyer at a lower price that is settled instantly."

Murabahah is closed. Murabahah is a sale at cost plus a disclosed profit. AAOIFI Shari'ah Standard No. 8 (issued 16 May 2002), clause 2/2/3, gives this example: "it is not permitted for a customer to sell an ordered item to the Institution and then repurchase it through a Murabahah transaction." The clause also covers suppliers the customer owns, and voids such a sale "as it is tantamount to 'Inah". Usmani (p. 106) applies the rule to an asset the client already holds: "If it is purchased by the bank from the client himself and is sold to him, it is a buy-back technique which is not allowed in Shari'ah, especially in murabahah."

A lease back is open, with a condition. Ijarah is a lease of an asset's use for rent. AAOIFI Shari'ah Standard No. 9 on Ijarah (issued 16 May 2002), clause 3/2, reads in full:

"An asset may be acquired by a party and then leased to that party. In this case, the Ijarah transaction should not be stipulated as a condition of the purchase contract by which the Institution acquires the asset."

The appendix gives the reason: leasing back "does not involve any 'Inah sale." Clause 8/5 adds a condition where the lease ends in a sale back. Ijarah muntahia bittamleek is a lease that ends in ownership. The clause reads, without its closing cross-reference:

"If the leased asset was purchased from the lessee before it was leased back to the lessee on the basis of Ijarah Muntahia Bittamleek, a (reasonable) period of time, between the lease contract and the time of the sale of the asset to the lessee, must have expired, to avoid the contract of 'Inah. This period must be long enough so that the leased property or its value could have changed. This shall also apply to the case of early ownership of the asset where a sale contract is concluded during the Ijarah."

Gatehouse's acquisition payments are monthly. Whether clause 8/5 reaches this structure at all, and whether one month would meet it, is open.

The £240,000 redemption figure includes whatever the old contract charges to the day, paid from the bank's price. No cited source addresses whether that final payment affects the new plan. On this article's reading, it is the last payment on the old debt, not a term of the new contract.

The Gharar Question

Gharar is excessive uncertainty in a contract's terms. A refinance fixes its main figures at completion: the bank's price, the two shares and the buy-back total. Gatehouse bases the finance on "the purchase price or valuation, whichever is the lower". A refinance has no purchase price, so the valuation sets the shares. The analysis of valuation fees explains what the report covers.

One uncertainty sits in what is published. The handbook says the bank grants the lease "simultaneously" with the transfer. Clause 3/2 bars making the lease a condition of the purchase. Usmani (p. 62) allows "the joint purchase and the contract of lease" to be "joined in one document". Whether the Gatehouse transfer is conditional on the lease is not stated in the public documents. That is a gap in disclosure, not proof of gharar.

The Maysir Question

Maysir is gambling, a gain from chance at another's loss. The refinance contains no wager. Price risk remains, because the house may rise or fall after the bank buys. The analysis of falling prices covers who bears a fall.

Where Scholars Differ

No scholar in scope has published on refinancing a conventional mortgage into a home purchase plan. The texts read for this article support two readings of the 'inah question.

The substance reading. AAOIFI clause 8/5 asks whether "the leased property or its value could have changed" before the sale back. Its appendix explains that such changes "give it the economic characteristics of a different asset." On this reading, a buy-back that starts a month after the sale sits close to the line, because a house barely changes in a month. A board applying 8/5 by analogy might want a longer first gap. But clause 8/5 is written for ijarah muntahia bittamleek. Standard 12 on diminishing musharakah has no such clause.

The form reading. Mufti Faraz Adam's 2024 essay lists when 'inah "will manifest". The conditions include "The transactions are back-to-back and immediate." Another is that one leg is spot and the other "deferred and payable later". He then lists when 'inah "will not manifest", including:

"If the price of the second contract is the same as the first contract. There will no possibility of Ribā as there is no excess."

Here the bank pays £240,000 and receives £240,000. On this reading, the price test is met. The essay does not apply its test to home finance. That application is this article's inference.

Usmani (p. 61) describes bai' bil wafa, a house sale with a promise to resell:

"the Hanafi jurists have opined that if the resale of the house to the original seller is made a condition for the initial sale, it is not allowed. However, if the first sale is effected without any condition, but after effecting the sale, the buyer promises to resell the house whenever the seller offers to him the same price, this promise is acceptable and it creates not only a moral obligation, but also an enforceable right of the original seller."

He cites it to show that a promise can bind. He does not apply it to refinancing. In bai' bil wafa the buyer promises to resell. In a home purchase plan the customer promises to buy.

The disagreement lies in the test. AAOIFI's clause looks at time and economic substance. The conditions Mufti Faraz Adam lists, citing Hanafi jurists, look at price and payment. On a refinance with monthly buy-backs at the original price, the two tests may point different ways. This is open.

Tawarruq. AAOIFI Shari'ah Standard No. 30 (effective 23 November 2006) defines monetisation, its term for tawarruq. It is "the process of purchasing a commodity for a deferred price determined through Musawamah", followed by a cash sale to someone else. The standard defines 'inah as a sale back "to the same party". Its full text is available only to AAOIFI members, so its conditions were not read for this article. Mufti Faraz Adam's 2024 essay lists "Commodity Murabahah" among "contextual Ḥiyal", which he describes as "stratagems". Usmani's 1998 book does not discuss tawarruq by name.

Relying on the board. In a 2016 answer on Al Rayan's home purchase plans, Mufti Faraz Adam accepted that "Some issues may not be understood by all or may be open for debate". He concluded that "you may follow their approval and certification." On that view, a customer may rely on a reputable Shari'ah board where the texts leave a question open.

What Remains Impermissible

The source named with each point bars it:

Refinancing by murabahah on a house you already own. AAOIFI Standard 8, clause 2/2/3, and Usmani (p. 106) both bar it.
A lease made a condition of the bank's purchase. Standard 9, clause 3/2, bars it. Standard 12, clause 5/1, states: "It is not permitted that one contract be entered into as a condition for concluding the other."
An offset mortgage as a substitute for refinancing. A 2023 darulfiqh.com answer approved by Mufti Faraz Adam holds that full offset "is still seen as charging interest, which is of course prohibited."

Practical Guidance

Before you apply. Ask your current lender for a redemption statement. Ask what early repayment charge applies. FCA rule MCOB 12.3.1 requires that charge to be "a reasonable pre-estimate of the costs" of repaying early.

Check your band. Divide the redemption figure by the valuation. Gatehouse refinances up to 80 percent FTV.

Ask the Shari'ah question in writing. Ask how long passes between completion and the first acquisition payment. Ask how the bank's Shari'ah board treats Standard 9, clause 8/5, on a refinance. Ask whether the lease is a condition of the transfer.

Know the new exit charge. The Gatehouse five year refinance fix charges 3 percent in years 1 and 2. It charges 2 percent in years 3 and 4, and 1 percent in year 5. You can pay off 10 percent of the balance each year without charge.

If you also invest. Screen what you hold. Use the stock screener for listed shares. Use the crypto screener for digital assets.

Conclusion

Refinancing out of a conventional mortgage is a move away from riba. The difficulty is that the bank buys from you. AAOIFI closes the murabahah route and opens the lease back route.

On a Gatehouse refinance, the price out equals the price in. On this article's reading, that meets the price test Mufti Faraz Adam states. AAOIFI's time test in clause 8/5 was written for a different contract, and no scholar in scope has said whether it reaches a monthly buy-back. Ask the bank's Shari'ah board.

This article is educational. It is not a fatwa, which is a formal religious ruling, and it is not financial or legal advice.

Frequently Asked Questions

1. Can I move my conventional mortgage to an Islamic bank?

Yes. Gatehouse says it considers applications for refinancing. Al Rayan's Premier route accepts applicants from five Gulf states.

2. Do I pay stamp duty when I refinance?

Not on the Gatehouse structure. Section 71A(2)(a) of the Finance Act 2003 exempts the bank's purchase from you. Gatehouse states that all three stages are exempt.

3. Is selling my house to the bank and renting it back 'inah?

AAOIFI permits a lease back under Standard 9, clause 3/2. For a lease ending in ownership, clause 8/5 requires a gap before the sale back. Whether it reaches monthly buy-backs is open.

4. Can the Islamic bank use murabahah instead?

No. AAOIFI Standard 8 and Usmani bar murabahah on an asset the customer already owns.

5. What if no Islamic bank will take my case?

Mufti Faraz Adam answered a similar question about credit cards. He permits a lower interest loan only "as a last resort and purely to save oneself from more sin". Applying it to a mortgage is an analogy.

6. Does the Islamic bank pay my old interest?

The bank pays a price for its share. You use that money to clear the redemption figure. That figure may include interest to the day. No cited source rules on it.

7. Is an offset mortgage a halal alternative?

No. A 2023 answer approved by Mufti Faraz Adam holds that a full offset is still interest.