| What is being priced | An asset (sale price) or the use of an asset (rent) | The use of money |
| Does the financier own the asset | Yes, at some point in the transaction (fully in Murabaha and Ijara, partially in Musharakah) | No; the lender holds a lien on an asset you own |
| Compounding | Not permitted; the price or rent is fixed for each period and late amounts cannot earn more profit | Interest on unpaid interest is standard |
| Late payment | Late fees are allowed only as a deterrent and must be donated to charity, not kept as income (AAOIFI) | Late interest and fees are lender revenue |
| Can the total cost rise after signing | Fixed-price Murabaha: never. Ijara and Musharakah: rent can reset on scheduled dates, but each period's amount is known before it begins | Fixed-rate loans: no. Adjustable-rate loans: yes, within caps |
| Benchmark used | Often a published index (Treasury, SOFR) is used as a reference to set the rent or mark-up; scholars permit the benchmark as a measuring stick, not as the basis of the contract | Same indexes, as the basis of the interest charge itself |
| Required U.S. disclosure | Providers issue TILA/Regulation Z disclosures with an APR-equivalent and a Loan Estimate and Closing Disclosure under TRID | Same disclosures |
| Tax treatment of payments | Profit or rent portion generally reported on Form 1098 and treated like mortgage interest for the deduction | Deductible as mortgage interest within IRS limits |
| Shariah status | Permissible when the contract is executed properly | Prohibited (riba al-nasiah) |