What Is DSCR?
The Debt Service Coverage Ratio measures whether a property's income is sufficient to cover its debt payments. It's the single most important ratio for rental property investors and the first thing commercial lenders look at.
DSCR = Net Operating Income (NOI) / Annual Debt Service
"Debt service" simply means your total annual mortgage payments (principal + interest).
Interpreting DSCR
| DSCR Value | Meaning |
|---|---|
| Below 1.0 | The property doesn't earn enough to cover the mortgage — negative cash flow |
| 1.0 | Exactly breaks even — income equals debt payments (no margin for error) |
| 1.2 | Income is 20% above debt payments — healthy buffer |
| 1.5+ | Strong — 50% income cushion above debt requirements |
Malaysian Example
You own a shophouse in Klang rented at RM 5,000/month:
- Annual gross rental: RM 60,000
- Operating expenses (maintenance, insurance, management): RM 12,000
- NOI: RM 48,000
- Annual mortgage payment: RM 36,000 (RM 3,000/month)
DSCR = RM 48,000 / RM 36,000 = 1.33
A DSCR of 1.33 means you have a 33% income cushion above your mortgage. If the tenant leaves for 4 months, you can still survive because your annual income buffer (RM 12,000) covers roughly 4 months of vacancy.
When DSCR Goes Wrong
Consider a KL condo: NOI of RM 18,000/year against RM 22,000/year in mortgage payments:
DSCR = RM 18,000 / RM 22,000 = 0.82
This means the rental income covers only 82% of your mortgage. You're subsidizing RM 333/month from your own pocket. This is common in high-price, low-yield urban markets — and it's a warning sign.
US Commercial Lending
In the US, commercial lenders typically require a minimum DSCR of 1.20-1.25 to approve a loan. A $500,000 property generating $45,000 NOI with $36,000 annual debt service has a DSCR of 1.25 — just meeting the threshold.
DSCR vs. Cap Rate
Cap rate tells you the return relative to price. DSCR tells you whether the property can pay for itself. You need both:
- A property can have a good cap rate but poor DSCR if you're highly leveraged
- A property can have a modest cap rate but great DSCR if you put more money down
Always calculate both metrics before making a financing decision.