Near the JB CIQ, a studio and a dual-key unit earn similar yields when bought at a similar price per square foot. In our worked example, a hypothetical RM400,000 studio gives about 5.1% gross and 2.6% net, and a hypothetical RM650,000 dual-key let as two keys gives about 5.0% gross and 2.5% net. The studio is cheaper to enter and easier to manage. The dual-key’s real advantage is flexibility: you can live in one key and let the other, let both, or let the whole unit later.
“Should I buy a studio or a dual-key?” is one of the first questions investors ask when they shortlist a condo near the Causeway. Both layouts target the same tenant: the cross-border commuter who wants a short walk to the CIQ and, from February 2027 (target), the RTS Link. Brochures often suggest the dual-key automatically earns more. The numbers below show a more useful answer: the dual-key vs studio investment decision depends less on headline yield and more on how much cash you want to commit, how much management you will take on, and whether you might live in the unit yourself one day.
This guide compares the two side by side using rents from our own JB RTS and CIQ Rent Index (Q4 2026), clearly labelled hypothetical prices, and the running costs Malaysian landlords actually pay. Both formats exist at Causewayz Square, so we use its layouts as a reference point.
Dual-key vs studio: what is the difference for an investor?
A studio is one open-plan room with one bathroom and one tenancy. A dual-key is one unit with two lockable sections and two entrances, so it can be let as two separate spaces or as one whole home, while remaining one title, one SPA and one loan.
At Causewayz Square, the Type A studio in Axis is about 366 sq ft (some portals list 336 sq ft, so treat the SPA figure as final), and the Type B dual-key in the same tower is 592 sq ft with two rooms, two bathrooms and one parking bay. Brixton and Dover also offer 850 sq ft Types F1/F2 dual-keys with three bedrooms and two parking bays. Our Causewayz Square dual-key guide covers how the two keys are laid out; this article focuses only on the investment comparison.
| Feature | Studio | Dual-key |
|---|---|---|
| Reference size (Causewayz Square) | About 366 sq ft (Type A) | 592 sq ft (Type B); 850 sq ft (F1/F2) |
| Tenancies | One | One or two, your choice |
| Ticket size | Lowest in the project | Higher, roughly in line with its larger size |
| Own-stay option | Whole unit only | Live in one key, let the other |
| Furnishing | One set | Two sets if let separately |
| Typical tenant | Single commuter | Two singles, a couple, or a small family (whole unit) |
What rent can each layout earn near the CIQ?
Smaller spaces earn more per square foot, which is the whole logic behind compact layouts. In our Q4 2026 rent index, studios and 1-bedrooms in the RTS/CIQ core had a median asking rent of RM4.31 psf a month, and the best-performing project (R&F Princess Cove) reached about RM4.82 psf. Two-bedroom units had a median of RM3.53 psf.
Applying those index figures to the reference sizes gives these illustrative monthly rents. Causewayz Square itself is under construction (target completion around 2030), so these are not forecasts for any project, just today’s neighbourhood rates applied to similar sizes.
- Studio, about 370 sq ft: RM4.31–4.82 psf gives RM1,600–1,780. We use RM1,700.
- Dual-key, 590 sq ft, let as two keys: the main key (about 370 sq ft, with the kitchenette) priced like a studio at RM1,700; the smaller suite (about 220 sq ft, own bathroom, no full kitchen) priced below the studio band at RM1,000. Total RM2,700, or about RM4.58 psf.
- Dual-key let whole: priced as a two-room home at the 2-bedroom rate of RM3.53 psf, about RM2,100.
What this means for you: splitting the dual-key adds about RM600 a month compared with letting it whole. That premium is the reward for running two tenancies instead of one.
Dual-key vs studio rental yield: a worked example
When both units are bought at a similar price per square foot, the studio and the split dual-key land at almost the same net yield, around 2.5–2.6%. The prices below are hypothetical round numbers chosen only to show the arithmetic: RM400,000 for the studio and RM650,000 for the dual-key (both about RM1,080–1,100 psf). They are not the price of any unit at Causewayz Square or anywhere else. WhatsApp us for the latest SPA price list.
| Per year (hypothetical) | Studio, RM400,000, 370 sq ft | Dual-key let as 2 keys, RM650,000, 590 sq ft | Dual-key let whole |
|---|---|---|---|
| Monthly rent | RM1,700 | RM2,700 | RM2,100 |
| Gross annual rent | RM20,400 | RM32,400 | RM25,200 |
| Gross yield | 5.10% | 4.98% | 3.88% |
| Maintenance (RM0.50 psf) + 10% sinking fund | RM2,442 | RM3,894 | RM3,894 |
| Assessment, quit rent, insurance (assumed) | RM830 | RM1,120 | RM1,120 |
| Management (5% of rent) | RM1,020 | RM1,620 | RM1,260 |
| Vacancy (1 month per key) | RM1,700 | RM2,700 | RM2,100 |
| Letting fees (0.5 month per key per year) | RM850 | RM1,350 | RM1,050 |
| Repairs (assumed) | RM500 | RM900 | RM700 |
| Furnishing over 7 years | RM2,857 (RM20,000) | RM4,571 (RM32,000) | RM3,714 (RM26,000) |
| Total running costs | RM10,199 | RM16,155 | RM13,838 |
| Net yield | 2.55% | 2.50% | 1.75% |
Three takeaways. First, the dual-key does not automatically out-yield the studio; its extra rent is largely offset by the higher price, a second set of furniture and a second vacancy and letting cycle. Second, letting the dual-key whole is the weakest pure-yield option, so the dual-key only shines as an investment if you are prepared to split it. Third, the result swings with entry price: if the dual-key costs less per square foot than the studio, it pulls ahead; if it costs more, the studio wins. That is why the price per square foot of the specific units you are offered matters more than the layout label. The cost assumptions follow our JB rental yield guide.
But what about monthly cash flow with a loan?
With a 90% loan at an assumed 4.0% over 35 years, the studio’s instalment is about RM1,594 and the dual-key’s about RM2,590. After running costs (excluding the furnishing you paid upfront), the studio needs a top-up of roughly RM500 a month and the split dual-key roughly RM860. The studio’s smaller ticket means a smaller gap to fund, which matters if your buffer is limited. Bank Negara held the Overnight Policy Rate at 2.75% at its final 2026 meeting on 5 November, so 4.0% is a reasonable working assumption, but use your own bank quote.
The live-in-one, rent-the-other scenario
The dual-key’s strongest case is not as a pure investment but as a home that helps pay for itself. A studio cannot do this; a dual-key can.
Illustration: you live in the main key of the hypothetical RM650,000 dual-key and let the suite at RM1,000 a month. After a share of management, vacancy and letting costs, the suite might net about RM800 a month. Against an instalment of about RM2,590, that covers roughly 30% of your loan repayment while you live a short walk from the CIQ. If you later move to Singapore or upgrade, you can let both keys and switch to the investment model above, or combine the keys for a couple or small family.
For a commuter deciding between owning and renting, our buy-to-let vs own-stay guide works through that decision in more detail.
Management effort: what running each layout really involves
A studio is the simplest unit to own from a distance; a dual-key let as two keys roughly doubles the admin. Before you choose, be honest about how much time you, or a paid manager, will spend.
| Task | Studio | Dual-key (2 keys) |
|---|---|---|
| Tenancy agreements and deposits | 1 | 2 |
| Tenant turnovers (two-year leases) | About 1 every 2 years | About 2 every 2 years |
| Furnishing and replacement | One set | Two sets, one with a pantry corner |
| Utilities | Tenant pays | Check separate meters; if shared, agree a split or include it in rent |
| Neighbour issues | Rare | Two tenants share a connecting door, so set house rules |
| Parking | One bay, one tenant | One bay (Type B) for two tenants, so allocate it clearly |
Many owners who live in Singapore or elsewhere appoint a manager for either layout. The Board of Valuers scale puts management at 5% of gross rent on the first RM30,000, which we already included in the yield table. See our guide to property management in JB for what a manager typically handles.
Resale pool: who will buy each unit from you later?
A studio sells mainly to investors; a dual-key sells to investors and to owner-occupiers who like the live-in-one, rent-one idea. That difference shapes how easy each is to sell in ten years.
- Studio buyers are mostly yield-focused Malaysian investors and first-time buyers stretching to a city-centre address. Because the ticket is small, more buyers can afford it, but they compare it closely with every other studio nearby, and the RTS area already has deep studio stock (SKS Pavillion alone had 50 studio and 1-bedroom rental adverts in our index window). Johor also had 9,946 unsold completed serviced apartments in the first half of 2026, the most of any state according to Finance Ministry figures reported by Malay Mail, so a studio has to stand out on location, condition and building quality.
- Dual-key buyers are a smaller but more motivated pool: commuters who want help with the instalment, parents buying for a working child, and multi-generation families. There are fewer dual-keys on the market, so a well-kept one tends to stand out rather than compete on price alone.
- Foreign buyers: Johor generally treats RM1 million as the foreigner threshold, and units below it need specific state approval and carry a higher minimum levy (see our Johor state levy guide). For units under RM1 million, plan on Malaysian buyers being your main resale market.
Malaysian citizens and PRs pay no real property gains tax from the sixth year of ownership, while foreigners pay 10% from year six (30% before that), per 2026 RPGT tables. Either way, both layouts suit a long hold better than a quick flip.
But what about short-term letting or bank valuations?
Short-term letting changes how volatile your income is more than it changes which layout wins. Before relying on it, check the building’s house rules and local guidelines, test a realistic weekday occupancy rather than a holiday peak, and budget for cleaning and a dedicated operator. Axis at Causewayz Square has a planned hospitality operator (Mana-Mana), which may suit Type A and Type B owners who prefer a managed arrangement, but its terms have not been published. A sound approach is to buy a unit that works on long-term rent first and treat short-stay income as a bonus; our Airbnb near the JB RTS guide covers the practical side.
On financing, both layouts are one unit and one loan, so the process is the same. The differences are size-related: the dual-key needs a larger deposit and instalment, a third housing loan is capped at 70% loan-to-value by Bank Negara, and banks may value dual-keys conservatively because fewer comparable transactions exist. A loan pre-approval before you book makes the choice much clearer.
Which one should you choose?
Choose the studio if you want the lowest entry price, the simplest management and a pure rental investment. Choose the dual-key if flexibility is worth more to you than simplicity, especially if you may live in the unit or want to let it to a small family later.
| Your situation | Usually the better fit | Why |
|---|---|---|
| First investment, limited cash buffer | Studio | Smaller deposit and monthly top-up |
| Owner living overseas, wants low effort | Studio | One tenancy, one turnover cycle |
| Commuter who will live in JB | Dual-key | Live in one key, let the other |
| Long-term holder who wants options | Dual-key | Split, whole or own-stay as the market changes |
| Parents buying for a child working in Singapore | Dual-key | Child lives in one key, the other helps with costs |
| Wants maximum yield at any cost | Neither by default | Compare price per sq ft of the actual units |
But what if you cannot decide? A practical tie-breaker is to run both units through the JB property calculator with the real SPA prices and your own loan quote, then ask which monthly gap you would be comfortable carrying through a vacant month. For the full year-by-year picture, including interest during construction, see our JB condo cash flow model.
Next step: compare the real numbers
The comparison above uses hypothetical prices, so the final answer depends on the actual SPA price of the studio and dual-key units still available, and on which floor and facing you can get. WhatsApp us for the latest SPA price list and the official Type A and Type B floor plans at Causewayz Square, or compare all three EXSIM projects on the project comparison page.
Sources
- exsimciqrts.com: JB RTS & CIQ Rent Index, Q4 2026
- Bank Negara Malaysia: Monetary Policy Statement, 5 November 2026
- StashAway: RPGT Malaysia 2026 rates and exemptions
- Malay Mail: Unsold completed homes, H1 2026
- The Star: Bank Negara keeps OPR steady at 2.75% (Nov 2026)
- LTA newsroom: RTS Link service targeted for February 2027
This guide is general information, not financial advice.