New launch condos are exciting: showflat visits, early-bird discounts, brand-new everything. But they come with a financial catch that many buyers overlook. During the 2-3 year construction period, you are paying mortgage interest on progressively drawn-down amounts while earning zero rental income. How much does this "dead money" period actually cost you?
This calculator models the entire new launch timeline — from booking fee to TOP to first rental cheque — so you can compare the true cost of a BUC (Building Under Construction) property against a resale unit that generates income from Day 1.
What This Calculator Does
Buying a new launch condo? Understand progressive payment schedules, interest costs during construction, and your true total outlay before TOP. Model the full timeline from booking fee to rental income, including the hidden cost of paying interest with zero rental income during the 2-3 year build period.
You can find this calculator in the Calculators tab on ShiokNest. It updates results instantly as you adjust inputs — no waiting, no page reloads.
Why This Matters
New launch condos are marketed with beautiful showflats and attractive early-bird pricing, but the financial reality is more complex. The construction period creates a unique cash flow pattern that is fundamentally different from resale purchases. This calculator matters because:
- Interest during construction is "dead money" — you pay it but earn nothing
- Progressive payment schedules mean your monthly outlay varies throughout construction
- Comparing new launch vs resale requires modelling the construction gap
What You Will Discover
After running this calculator with your personal numbers, you will know:
- Progressive payment timeline and amounts at each construction milestone
- Total interest cost during the construction "dead money" period
- When rental income starts and your cash flow turns positive
- Full comparison of new launch vs resale financial outcomes
Key Inputs Explained
Here are the inputs you will configure, along with their default values. Each default is calibrated to a realistic Singapore condo scenario so you can explore results immediately.
| Field | Description | Default Value |
|---|---|---|
| Purchase Price | The total property price before additional costs. | $1,800,000 |
| Down Payment (%) | Your cash/CPF contribution as % of price. | 25.0% |
| Interest Rate (%) | Annual loan interest rate. | 3.5% |
| Loan Tenure (Years) | Duration of the mortgage loan. | 25 years |
| Construction Period (months) | Time from purchase to TOP. | 36 months |
| Monthly Rent | Expected monthly rental income or rent you would pay. | $4,000 |
| Buyer Profile | Your residency status (SC/PR/Foreigner). | SC 1st |
| Annual Appreciation (%) | Expected yearly increase in property value. | 3.0% |
Step-by-Step Guide
- 🏠 Navigate to Calculators — Click the "Calculators" tab in the ShiokNest navigation bar. All 26 calculators are grouped by purpose for easy access.
- 🔍 Select the calculator — Choose "How to Analyse Under Construction Investments" from the calculator list. You will see default values already loaded so you can explore immediately.
- ✏️ Enter your values — Replace the defaults with your own numbers. The key fields are:
- Purchase Price — The total property price before additional costs.
- Down Payment (%) — Your cash/CPF contribution as % of price.
- Interest Rate (%) — Annual loan interest rate.
- Loan Tenure (Years) — Duration of the mortgage loan.
- Construction Period (months) — Time from purchase to TOP.
- Plus 3 more fields for fine-tuning your scenario.
- 📊 Review the results — The calculator updates instantly as you change any input. KPI cards show your down payment, construction timeline, estimated interest during construction, and post-TOP rental income.
- 🔄 Run what-if scenarios — This is where the real power lies. Change one variable at a time to see its impact. For example, try increasing the interest rate by 1% or extending your holding period by 5 years. Note how the results shift.
- 💾 Compare and decide — Run 2-3 different scenarios and note the results. This gives you a range of outcomes to base your decision on, rather than relying on a single projection.
Worked Example
Meet Li Wei, buying a $1,800,000 new launch condo in Tengah with a 36-month construction timeline. Unlike a resale purchase, he will not pay the full price upfront — instead, payments are drawn down progressively as construction milestones are hit.
The hidden cost of new launches: During the 36-month build period, Li Wei pays interest on the progressively drawn-down loan amount but earns zero rental income. This "dead money" period costs approximately $70,875 in interest alone. Many new launch buyers overlook this cost when comparing against resale properties that generate rent from Day 1.
Progressive payment schedule: Typically 20% at booking, then staged payments at foundation (10%), reinforced concrete (10%), brick walls (5%), ceiling/roofing (5%), and so on until TOP. The calculator models this entire timeline and shows your actual cash outflow month by month.
Real-World Scenarios to Try
Here are some realistic scenarios you can plug into the calculator right now. Each one reflects a common situation Singapore property buyers face.
| Scenario | Settings to Try | What You Will Learn |
|---|---|---|
| Standard new launch | $1.8M, 36-month build, Rent: $4K | Typical cost profile for a new launch purchase in the current market |
| Long construction period | $1.8M, 48-month build, Rent: $4K | How a delayed project increases your total interest burden |
| Premium new launch | $2.5M, 30-month build, Rent: $6K | Whether higher-end new launches recover construction costs faster through higher rent |
Expert Tips and Common Pitfalls
💡 Pro Tips
- Use realistic assumptions — Singapore condo appreciation has historically averaged 2-4% per year. Avoid overly optimistic projections. When in doubt, use 3% as a baseline.
- Add 6-12 months buffer — Construction delays are common. Budget for extra months of interest payments with no rental income.
- Compare against resale — A resale condo generates rent from Day 1 and has no construction risk. Use the Side-by-Side calculator to quantify the difference.
- Check defect liability period — After TOP, you typically have 1 year to report defects. Inspect thoroughly before the period expires.
⚠️ Common Pitfalls
- Underestimating construction interest — Interest accrues from day one on drawn-down amounts. Over 36 months, this adds up to tens of thousands.
- Developer price premium — New launches typically sell at 10-20% premium over comparable resale units. Factor this into your appreciation assumptions.
🤔 What-If Scenarios to Explore
Get the most value from this calculator by testing these scenarios:
- What if construction is delayed by 12 months? How much extra interest do you pay?
- What if the property appreciates 15% by TOP — what is your paper gain vs total cost?
- Run at least 3 scenarios — best case, base case, and worst case — to understand the full range of outcomes.
Related Calculators
Your property journey involves many interconnected decisions. These calculators work hand-in-hand with this one:
- How to Use the End-to-End Investment Calculator
- How to Calculate stamp duty (IRAS BSD ratesBSD + ABSD)
- How to Use the mortgage calculator
Ready to Crunch Your Numbers?
Enter the purchase price, construction period, and loan details. See the full timeline of payments and costs, including the often-overlooked interest during the build period.
Official Sources
This how-to guide is auto-generated using ShiokNest's calculator defaults. All worked examples use default values — adjust inputs to match your personal scenario for accurate results.