Is this calculator the same math as the Diminishing Musharakah Calculator?

Yes — this tool applies the identical diminishing co-ownership schedule to home financing specifically; use the Diminishing Musharakah Calculator for the general-purpose version.

Why do Islamic mortgage payments decline instead of staying level like a conventional mortgage?

Because each payment includes rent only on the bank's remaining ownership share, and that share shrinks every month as the buyout portion transfers ownership to you.

Do Islamic mortgages have a fixed "interest rate" like conventional mortgages?

No — they reference a rental benchmark rate applied to the bank's ownership share rather than an interest rate applied to a debt balance, though the two can look numerically similar when comparing quotes.

Can I refinance an Islamic mortgage?

In practice yes, though the process restructures the co-ownership agreement (or replaces it with a new Murabaha/Ijara/Diminishing Musharakah contract) rather than simply changing a loan's interest rate — ask your bank how their refinance product works.

Is a down payment required for Islamic home financing?

Yes — the down payment is your initial ownership stake; the bank finances the remaining share, which you can enter as the property value minus your down payment in this calculator.

What happens if I sell the home before the term ends?

You and the bank split the sale proceeds according to each party's ownership share at that point in time, since you're both co-owners of the underlying property.

Are Islamic mortgages available for refinancing an existing conventional mortgage?

Some Islamic banks offer this, but it requires unwinding the conventional loan and establishing a fresh co-ownership (or Murabaha/Ijara) contract on the property — availability varies by institution and jurisdiction.

Does this calculator include property taxes, insurance, or HOA fees?

No — it computes only the financing payment (rent plus buyout) itself; add taxes, insurance, or association fees separately for a full monthly housing cost estimate.

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Islamic Tools

Islamic Mortgage Calculator

Home financing via Diminishing Musharakah, the dominant real-world Islamic mortgage structure.

🔒 Runs entirely in your browser — nothing here is ever uploaded

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Last reviewed 2026-09-06

About the Islamic Mortgage Calculator

Home financing modeled as Diminishing Musharakah, the dominant real-world Islamic mortgage structure — see the Diminishing Musharakah Calculator for the full underlying mechanics.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Enter the property value and your down payment.
Enter the annual rental benchmark rate.
Enter the term in years.
Read the first and last month's payment and totals.

Formula

Same as Diminishing Musharakah: monthly rent on the bank's remaining share, plus a constant buyout installment.

Worked example

A $300,000 home, $60,000 down, 5% annual rate, 20-year term: payments start around $1,300/month, declining to roughly $1,017/month.

How the Monthly Payment Behaves Over the Term

How the Monthly Payment Behaves Over the Term
Structure	Month 1 payment	Mid-term payment	Final month payment	Shape
Murabaha (fixed profit)	$638.89	$638.89	$638.89	Flat — total profit is fixed at signing and split evenly across every installment
Diminishing Musharakah (declining co-ownership)	$2,000.00	$1,504.17 (month 120)	$1,004.17	Declining — rent shrinks each month as the bank's ownership share is bought out
Ijara (lease)	$133.33	$133.33	$133.33	Flat — rent on the full asset value, with no ownership buildup

Interpreting your result

Real Islamic banks may structure a home-financing product slightly differently (e.g. a non-linear buyout schedule) — always get your bank's actual amortization table rather than relying solely on this illustrative model.

Recommendations

• This is the same underlying structure as the Diminishing Musharakah Calculator, just framed for home financing specifically.

Frequently asked questions

It's the dominant structure in practice, but Murabaha-based and Ijara-based home financing also exist at some institutions — ask your specific bank which structure their product actually uses.