Finance / CBUAE Rules
Understanding the CBUAE Debt Burden Ratio
Every UAE mortgage application is filtered through one rule first: your total monthly debt service cannot exceed 50% of your net monthly income. Here is exactly what counts.
The rule, in one sentence
DBR = (all monthly debt obligations including the new mortgage) ÷ (net monthly income) ≤ 50%
The Central Bank of the UAE publishes this cap in its Regulations Regarding Mortgage Loans (BIS-aligned, last refreshed mid-2026). It applies to every CBUAE-licensed mortgage lender in the country.
What counts as income
- Base salary — verified by 3-month bank statements + employer salary certificate.
- Housing allowance — counted in full if paid as a monthly cash component (separate line item).
- Transport / utility allowances — included at 100% by most lenders provided they appear on the salary slip.
- Annual bonus / commission — averaged over 2 years and discounted (usually 50% counted); some lenders refuse.
- Rental income — counted at 70-80% (vacancy + maintenance haircut) if Ejari registered and stable for 12+ months.
- Spouse income — included in joint applications; non-mortgaged co-borrower income still contributes if formally co-applied.
What counts as debt
- Existing mortgages — full monthly instalment, including any second-home mortgage.
- Car loans — monthly instalment.
- Personal loans — monthly instalment.
- Credit-card limit — most lenders attribute 5% of the total card limit as monthly debt regardless of actual balance. A AED 100,000 limit = AED 5,000/month against DBR.
- Buy-now-pay-later balances — counted at full monthly instalment value.
- The new mortgage itself — the proposed monthly mortgage payment is added before checking the 50% cap.
Worked scenarios
Each row shows whether the applicant clears the 50% DBR cap.
| Scenario | Net income / mo | Existing debt / mo | New mortgage / mo | DBR | Verdict |
|---|---|---|---|---|---|
| Single income, no debt | AED 25,000 | — | AED 9,500 | 38.0% | Passes DBR |
| Single income, car loan | AED 25,000 | AED 2,500 | AED 9,500 | 48.0% | Passes DBR |
| Dual income, joint mortgage | AED 60,000 | AED 4,000 | AED 22,000 | 43.3% | Passes DBR |
| High earner, credit-card debt | AED 150,000 | AED 8,000 | AED 60,000 | 45.3% | Passes DBR |
| Edge case: DBR exactly at 50% | AED 40,000 | AED 5,000 | AED 15,000 | 50.0% | Passes DBR |
Common pitfalls that fail applications
- Unused credit-card limits. The 5% limit-attribution rule means a high unused limit alone can blow DBR. Cancel or reduce limits before applying.
- Recent BNPL spending. Active instalments from tabby/postpay/spotii reduce affordability for the next 6-12 months.
- Variable income overweighting.Commission-heavy applicants often overstate sustainable income. Lenders use a 24-month conservative average.
- Misclassified salary components.An employer that bundles all allowances into a single "total package" line is harder to underwrite than one with itemised housing/transport rows.
Try your own numbers
Plug your income + obligations into the affordability calculator to see how much loan and property the 50% DBR cap supports.
Open affordability calculator