A renewal letter is usually two lines long: a new annual rent, and the date the tenancy rolls over. The one worth walking through moves the rent from AED 85,000 to AED 110,000 and says the figure comes from the RERA index. The index part is probably true. The AED 110,000 part is not what the decree allows, and the reason is a piece of arithmetic that almost every renewal argument gets backwards.
This is Dubai’s mechanism. Other emirates regulate tenancies under their own laws, so the five bands below should not be assumed to travel.
What the RERA rent increase calculator is actually measuring
Decree No. (43) of 2013, issued on 18 December 2013 and in force “on the day on which it is issued”, sets the maximum rent increase on renewal in five steps. The steps are keyed to a shortfall, not to a market price. There is no increase where the rent is up to ten per cent less than “the average rental value of similar units”. A shortfall of 11% to 20% permits 5%. A shortfall of 21% to 30% permits 10%. A shortfall of 31% to 40% permits 15%. At the top band the decree allows “twenty percent (20%) of the Rent of the Real Property Unit, where the Rent is more than forty percent (40%) less than the average rental value of similar units.”
The comparison is not against what the neighbour pays or what the same flat is advertised at today. The decree pins it to “the ‘Rent Index of the Emirate of Dubai’ approved by the Real Estate Regulatory Agency”. Since 2 January 2025 that index has been the Smart Rental Index, which grades buildings rather than just areas: Dubai Land Department describes the assessment as covering “technical and structural characteristics, the quality of finishes and maintenance, the building’s strategic location and its spatial value, as well as the level of services and facilities available, such as maintenance, cleanliness, and parking management”. Two towers on the same street can therefore carry two different benchmarks, which is why an argument built on a neighbour’s contract tends to go nowhere.
The cap is a percentage of the rent being paid, not a move to the market average
Back to the letter. Rent AED 85,000, index average for similar units AED 110,000. The shortfall is AED 25,000 against AED 110,000, or 22.7%, which lands in the 21% to 30% band. The permitted increase is 10%, and 10% is taken on the rent in the contract: AED 8,500. The legal ceiling for that renewal is AED 93,500, still AED 16,500 under the index average. The AED 110,000 asked for is a 29.4% rise, outside the decree by a wide margin.
The decree caps the increase as a percentage of the rent already being paid. It never promises the landlord the market average.
That single mechanic is what turns the caps into a glide path rather than a freeze. Take a rent of AED 60,000 against an index average of AED 120,000 and hold the index still:
| Renewal | Rent at start | Shortfall vs index | Band | Rent after |
|---|---|---|---|---|
| 1 | 60,000 | 50.0% | 20% | 72,000 |
| 2 | 72,000 | 40.0% | 15% | 82,800 |
| 3 | 82,800 | 31.0% | 15% | 95,220 |
Three renewals take the rent from AED 60,000 to AED 95,220 and close the gap from 50% to 21%, with smaller steps after that as the shortfall drops into the lower bands. Nothing here is frozen. A tenant sitting on a genuinely cheap contract should budget for several years of legal increases in a row, not one and then quiet.
The 90-day notice decides more renewals than the percentage does
Article 14 of Law No. (26) of 2007, as amended by Law No. (33) of 2008, reads: “Unless otherwise agreed by the parties to a Lease Contract, where either party wishes to amend any of its terms pursuant to Article (13) of this Law, that party must notify the other party of this intent no less than ninety (90) days before the date on which the Lease Contract expires.” Article 13 is the renewal article, and amending “any of its terms” includes the rent.
At the trading company where I work, every supplier price list has a review clause with a notice period attached. When a supplier sends a new price thirty days out and the contract says sixty, nobody in purchasing opens a debate about whether the new price is fair. They look at the date on the letter, file the increase for the following cycle, and keep paying the old price. The order of operations is the whole trick: date first, number second.
Rent works on the same logic and almost nobody reads it in that order. A renewal letter that arrives eighty days before expiry is a letter about next year, whatever percentage it carries. Two dates, one subtraction, done before anyone opens the calculator.
What it costs to argue, and what to set aside if it holds
If the notice is valid and the number is still wrong, the route is the Rental Disputes Center. Its fee schedule prices that route at “3.5% of Annual Rent” for renewal cases, “not less than (AED 500) and not more than (AED 20,000)”, with half the basic fee refunded if conciliation produces a settlement. On an AED 85,000 rent the filing fee is AED 2,975. Against a AED 16,500 overcharge that is arithmetic worth doing; against a AED 2,000 disagreement it is not, and saying so is more useful than pretending every dispute is worth filing. The other answer to an increase is to leave, and that comparison is rarely as close as it looks until the cost of moving flats sits on the same page as the extra rent.
The quieter habit is to stop budgeting rent at today’s number. Run the index gap once a year, take the band it produces, and carry the legal maximum as the planning figure. On AED 85,000 in the 10% band that is AED 8,500, or AED 708 a month, put aside across the year rather than found in a panic on the ninetieth day. Rent belongs with the other sinking funds for exactly that reason: it is the one bill that cannot be trimmed in the month it arrives, and it is the line I keep funded twelve months ahead in Masrofna.
The percentage is the loud part of a renewal. The date on the envelope is the part that decides it.