Type in a price, a deposit, a rate and a term, and a mortgage calculator gives you a monthly payment. Most people take that number, compare it with their salary, and decide what they can afford.
That is the least useful thing a calculator can tell you. The payment it shows is the best case — the price holds, the valuation agrees, the introductory rate lasts forever, and owning a flat in Dubai costs nothing beyond the loan. None of those are true for long.
Used properly, a calculator is a way to test a purchase before you commit to it. That means running it several times with different inputs, each one answering a specific question. Here is how to do that, worked through on a real-world example: a AED 1.8 million, 1,150 sq ft apartment in Dubai Marina, bought by a resident expat with a 20% deposit at 3.99% over 25 years.
Your payment goes down, but the cash you need to complete goes up by AED 72,000, and it has to be found before transfer. Run the calculator at 95% of the price and check you could cover the difference. If you could not, either negotiate a valuation clause into the Form F or keep a buffer. What happens when a valuation disappoints, and how to challenge one, is covered in property valuation for a Dubai mortgage.
Use reversion plus two. On this loan, that is AED 10,991 a month, and that is close to the number your bank will measure you against. If your total debts including that figure would exceed half your salary, the application will struggle regardless of how comfortable the introductory payment looks. The eligibility calculator runs this test for you, and how the debt burden ratio works explains what counts towards the 50%.
Each extra 5% of deposit takes roughly AED 475 off the starting payment and AED 570 off the reversion payment. Whether that beats keeping the cash depends on what else the money would do, and on how much of an emergency fund you have left after completion. Putting every dirham into the deposit and leaving nothing for a job change or a rate rise is a common and avoidable mistake. The limits for each buyer type are in UAE mortgage LTV rules for expats and nationals, and why the fees can no longer be borrowed is in the DLD fee financing ban.
A 50-year-old buying the same flat pays 40% more each month. If you are over 40, set the term to 65 minus your age before you run any of the other scenarios.
That is 41% more than the payment the calculator shows. After the fixed period ends and the payment resets, the same total is about AED 12,144 a month.
Service charges make an enormous difference to this picture, which is why two homes at the same price can cost very differently to own. A 3,200 sq ft villa in Dubai Hills at AED 3.50 per sq ft carries about AED 11,200 a year in service charges — less than the 1,150 sq ft Marina apartment at AED 18,515, despite being nearly three times the size. Always ask for the latest service charge for the specific unit before you make an offer, not the community average.
The one-off costs at purchase — around 7% of the price on top of your deposit — are a separate calculation, set out in the cost of buying property in Dubai.
Even with a 40% deposit, the flat roughly breaks even on the introductory rate and costs you AED 1,275 a month after it resets — before any vacant months or agent fees. The net yield on the price, after service charges and maintenance, is about 3.98%. That does not make it a bad investment; capital growth may well justify it. But it means the purchase is a bet on prices, not an income, and the calculator needs to tell you that before you sign. Areas with higher gross yields — Dubai Sports City and Al Furjan were above 7% in the same data — change the numbers considerably.
At the introductory rate, AED 10,000 a month looks like it supports a AED 1.9 million loan. At the stressed rate the bank will use, it supports about AED 1.3 million. That difference — nearly AED 600,000 — is how buyers end up house-hunting at the wrong price.
Run 1: the base case
Start with the numbers you have actually been quoted, not the ones on a developer brochure.- Price: the agreed price, not the asking price
- Deposit: at least the regulatory minimum — 20% for a resident expat’s first home under AED 5 million
- Rate: the rate in your pre-approval or a real offer
- Term: the longest your age allows, up to 25 years
Run 2: the valuation run
Before a bank lends, it sends its own valuer, and it lends against the lower of the price and the valuation. If the valuation comes in 5% below what you agreed to pay, the bank’s 80% is 80% of AED 1,710,000, not of AED 1,800,000.| Valuation matches price | Valuation 5% low | |
| Bank’s valuation | AED 1,800,000 | AED 1,710,000 |
| Maximum loan at 80% | AED 1,440,000 | AED 1,368,000 |
| Extra cash you need | — | AED 72,000 |
Run 3: the reversion run
This is the run most people skip, and it is the one that matters most over time. 3.99% is an introductory rate fixed for, typically, three years. After that the loan moves to EIBOR plus a margin set in your contract. With three-month EIBOR at 4.3704% on 9 October 2026 and a typical 1.50% margin, the reversion rate today is about 5.87%. Three years in, your balance will be around AED 1,332,920 with 22 years left. At 5.87%, the payment resets to AED 9,003 a month — AED 1,410 more than you started with. So enter the reversion rate into the calculator as a second scenario. If you can afford AED 7,593 but not AED 9,003, you can afford the first three years of this mortgage, not the mortgage. Why the margin you are offered matters more than the headline rate is worked through in what your interest rate actually costs.Run 4: the stress run
Banks do not approve you on the rate you are offered. They test whether you could still pay at a higher one, typically the reversion rate plus two percentage points or more, and that payment has to fit within 50% of your gross monthly income alongside your other debts. You will still see the old advice to “stress-test at 6%”. That made sense when mortgage rates were 3% and EIBOR was near zero. Today the reversion rate alone is close to 6%, so a 6% test tells you almost nothing new:| Rate tested | What it represents | Monthly payment |
| 3.99% | Introductory rate | AED 7,593 |
| 6.00% | The old rule of thumb | AED 9,278 |
| 5.87% | Reversion at today’s EIBOR | AED 9,164 |
| 7.87% | Reversion + 2 points | AED 10,991 |
Run 5: the deposit runs
If you have more cash than the minimum deposit, try a few versions. Bear in mind that since February 2025 none of the purchase fees can be added to the loan, so every option below needs the fees in cash on top:| Deposit | Loan | Payment at 3.99% | Payment at reversion | Total cash needed |
| 20% | AED 1,440,000 | AED 7,593 | AED 9,164 | AED 492,040 |
| 25% | AED 1,350,000 | AED 7,118 | AED 8,591 | AED 581,815 |
| 30% | AED 1,260,000 | AED 6,644 | AED 8,019 | AED 671,590 |
| 40% | AED 1,080,000 | AED 5,695 | AED 6,873 | AED 851,140 |
Run 6: the age run
Most banks want the loan repaid by 65 if you are salaried, so the calculator’s default of 25 years may not be available to you:| Age at application | Maximum term | Monthly payment on AED 1,440,000 |
| 35 | 25 years | AED 7,593 |
| 45 | 20 years | AED 8,719 |
| 50 | 15 years | AED 10,644 |
The costs no calculator shows
A mortgage calculator calculates a mortgage. Owning a home in Dubai costs more than that, and these are the lines people forget. Service charges. Every apartment and most villa communities charge an annual fee per square foot for maintenance, security, cleaning and amenities. The rates are approved under RERA and published in the Dubai Land Department’s service charge index, which you can check for a specific building through Mollak. They vary a lot. Indicative 2026 rates per square foot include around AED 16 in Dubai Marina, AED 15 in Business Bay, AED 14 in JLT — and AED 60 or more in Downtown’s landmark towers. Villa communities are usually far lower: around AED 3.50 in Dubai Hills Estate and AED 3 in Arabian Ranches. The housing fee. Dubai Municipality charges owners 5% of the estimated annual rental value of the property, collected monthly through your DEWA bill. Insurance. Life cover and property insurance are conditions of the mortgage, priced on the loan and the property respectively. Our guide to mortgage life insurance in the UAE covers what they cost and how to bring the premium down. Maintenance. Inside your own walls — air-conditioning servicing, appliances, repairs — is your cost, not the building’s. Budgeting around 0.5% of the property’s value a year is a sensible planning allowance for an apartment. Put them all together on the Marina apartment:| Monthly cost of ownership | Amount |
| Mortgage payment at 3.99% | AED 7,593 |
| Service charge (1,150 sq ft at AED 16.10, AED 18,515 a year) | AED 1,543 |
| Maintenance allowance (0.5% a year) | AED 750 |
| Housing fee (5% of estimated rent) | AED 413 |
| Life cover | AED 246 |
| Property insurance | AED 189 |
| Total monthly cost | AED 10,734 |
If you are buying to let
An investment purchase needs one more run: does the rent cover the costs? As a second property for an expat, the same flat can only be financed at 60%. That means a AED 1,080,000 loan, a payment of AED 5,695 a month, and around AED 851,140 in cash to complete. Dubai Marina apartments were yielding about 5.51% gross in August 2026, according to Property Monitor figures. On AED 1.8 million that is roughly AED 8,265 a month in rent. Take off the service charge, maintenance and insurance and about AED 5,598 is left before the mortgage:| At 3.99% | At reversion | |
| Rent left after running costs | AED 5,598 | AED 5,598 |
| Mortgage payment | AED 5,695 | AED 6,873 |
| Monthly cash flow | −AED 96 | −AED 1,275 |
Working backwards from a budget
You can also run the calculator in reverse: start with the payment you are willing to make and see what it buys. The important thing is to use the right rate.| Monthly budget | Loan it supports at 3.99% | Loan it supports at 7.87% |
| AED 8,000 | AED 1,517,207 | AED 1,048,149 |
| AED 10,000 | AED 1,896,508 | AED 1,310,186 |
The mistakes worth avoiding
- Entering the property price as the loan amount. The loan is the price minus your deposit.
- Using the introductory rate as the long-term rate. Run the reversion rate as well.
- Assuming 25 years. Check what your age allows first.
- Forgetting the cash. The deposit is not the whole bill; fees add around 7% and must be paid in cash.
- Ignoring service charges. On some apartments they are a fifth of the mortgage payment.
- Treating the result as an approval. A calculator tells you what a loan costs, not whether a bank will give it to you.
