After helping manage and market property portfolios for two decades, I notice the same handful of mistakes recurring across very different investors, markets, and price points. None of them require special bad luck to make, and all of them are avoidable with a bit of discipline before signing anything.
1. Falling in love with the unit before checking the numbers
It is human to be drawn to a unit because of the view, the layout, or how it felt walking in. The mistake is letting that feeling set the price you are willing to pay, rather than checking comparable transactions and realistic rental yield first. Decide your ceiling before you walk in, not after, and treat any number above it as a decision to walk away, not a target to negotiate down from.
2. Underestimating total holding costs
The purchase price is only the start. Stamp duties, property tax, maintenance and conservancy charges, and the opportunity cost of capital tied up in the property all add up, and they need to be part of the return calculation, not an afterthought discovered after completion. I have seen otherwise sound investments turn mediocre simply because the buyer's return calculation never accounted for these recurring costs in the first place.
3. Over-leveraging because the bank approved it
A bank's maximum loan approval reflects regulatory caps like TDSR and MSR, not your personal comfort with risk or your plans for the next few years. Just because a bank will lend you a certain amount does not mean borrowing right up to that limit is the prudent choice for your situation, particularly if you are also planning a job change, a new business, or a second property in the near future.
4. Relying solely on the seller's agent for advice
A seller's agent is doing their job well when they get their client the best price and terms, which is not the same job as protecting your interests. Independent legal advice and, where the numbers are significant, independent financial advice are not optional extras; they are how you make sure someone in the transaction is actually working for you rather than for the other side of the table.
5. Buying without an exit plan
Every property should have a rough answer to: how long do I plan to hold this, and who is the realistic buyer or tenant when I am ready to exit? Properties bought without this thinking tend to get held far longer than intended, often through a downturn, simply because there was never a clear plan for when and how to sell, and indecision becomes the default strategy.
6. Overlooking CPF and cashflow timing details
For Singapore residential purchases, the interaction between CPF usage, the CPF Withdrawal Limit, and accrued interest that needs to be returned to your CPF account on sale catches many first-time buyers off guard. These details affect how much cash you actually need at each stage and what you walk away with when you eventually sell, and they are worth modelling properly upfront rather than discovering them at completion, when there is no longer any room to adjust.
7. Treating the first property as the final decision
The first property is rarely the last financial decision a serious investor will make about real estate; it is the first step in a longer portfolio strategy. Buyers who treat it as a one-off, rather than as the foundation for what comes next, often structure the purchase, the financing, and even the entity in ways that make the second and third property harder than they needed to be.
None of these seven mistakes are exotic. They are simply the ones discipline and a second pair of eyes can catch before they become expensive. If you are about to make your first property investment, I am happy to look over the numbers with you before you commit.