Co-Payment (Health Insurance): The Percentage You Still Pay After Your Deductible
Co-payment, also called co-insurance, is the percentage of a hospital bill — typically 3% to 10% under MediShield Life — that a policyholder must pay after the annual deductible has been met, with Integrated Shield Plan riders able to reduce but no longer eliminate this cost from 1 April 2026.
Not financial advice. All figures for educational reference only. Data as at July 2026.
Key Takeaways
- MediShield Life co-insurance is tiered, generally ranging from about 3% on larger claims to around 10% on smaller claims, so bigger bills carry proportionally less risk once the deductible is cleared.
- Before the November 2025 reforms, many “as-charged” Integrated Shield Plan riders covered 100% of co-insurance and the deductible, resulting in effectively zero out-of-pocket cost for policyholders.
- From 1 April 2026, MOH requires all Integrated Shield Plan riders to impose a minimum co-payment of at least S$6,000 per policy year, up from the S$3,000 minimum first introduced in 2021.
- The reform targets what regulators call moral hazard — the tendency for fully-covered patients and their doctors to choose longer stays or costlier treatment when there’s no cost consequence to the patient.
- Co-payment applies on top of, not instead of, the deductible — you pay the deductible first, then the co-payment percentage on whatever remains of the bill.
What Is Co-Payment in Health Insurance?
Once a policyholder’s deductible has been paid, most Singapore hospitalisation insurance — both MediShield Life and private Integrated Shield Plans (IPs) — doesn’t switch to paying 100% of the remaining bill. Instead, the insurer and the policyholder split the remaining cost according to a fixed percentage, called co-insurance or co-payment.
The mechanism exists deliberately, not as an oversight. Insurance regulators worldwide use co-payment to keep policyholders “in the game” financially, so that hospitalisation decisions — choice of ward, length of stay, elective add-ons — still carry some cost consequence for the patient, rather than being made purely by the treating doctor with no budget constraint.
MOH first introduced a minimum co-payment requirement for IP riders in 2021, after finding that riders offering complete first-dollar coverage were associated with measurably higher claim frequency and higher average claim size than plans requiring some co-payment. A second, larger tightening took effect from 1 April 2026.
How Does Co-Payment Work in Singapore?
| Component | Pre-2021 Rules | 2021–March 2026 | From 1 April 2026 |
|---|---|---|---|
| As-charged rider coverage | Up to 100% (no minimum) | Minimum S$3,000/year co-payment | Minimum S$6,000/year co-payment |
| Deductible coverage by rider | Could be covered in full | Could be covered in full | Cannot be covered by rider — policyholder pays first |
| MediShield Life base co-insurance | Unchanged, ~3%–10% | Unchanged, ~3%–10% | Unchanged, ~3%–10% |
Source: Ministry of Health rider reform announcements, 2021 and 2026.
Co-Payment Example
Mdm Lee is warded in a private hospital and runs up a S$30,000 bill for a planned procedure.
- Deductible (paid first): S$3,000
- Remaining bill: S$27,000
- Co-insurance at an illustrative 10%: S$2,700 payable by Mdm Lee, S$24,300 payable by insurance
- Total exposure before rider: S$5,700
If Mdm Lee holds an as-charged rider bought after 1 April 2026, her rider can bring the co-insurance portion down, but her total minimum out-of-pocket across the policy year — deductible plus any remaining co-payment — cannot go below S$6,000, even though her actual exposure in this example (S$5,700) happens to sit just under that new floor.
Advantages of the Co-Payment Structure
- Keeps premiums lower for everyone. By discouraging unnecessary claims, co-payment helps moderate the premium increases that would otherwise hit the entire insured pool.
- Percentage-based, not fixed. Because co-insurance is a percentage, it scales with the size of the bill rather than being a flat shock regardless of claim size.
- Riders still meaningfully reduce cost. Even with the 2026 minimum, a good rider still typically cuts a five-figure bill’s out-of-pocket portion down to a low four-figure sum.
- Encourages informed treatment choices. Some cost-sharing nudges patients to discuss ward class and treatment options with their doctor rather than defaulting to the most expensive option.
Risks and Limitations
- Higher minimum floor from 2026. The jump from S$3,000 to S$6,000 doubles the guaranteed minimum annual out-of-pocket cost for rider holders.
- Multiple hospitalisations compound cost. Co-insurance applies to every claim after the deductible, so a chronic condition with repeated admissions can accumulate meaningful out-of-pocket cost across a year.
- Older riders may need review. Riders bought before the reform may have different terms — policyholders should check with their insurer whether their specific rider is grandfathered or subject to the new minimum.
- Confusing terminology. “Co-payment” and “co-insurance” are often used interchangeably in Singapore, which can cause confusion when comparing plan brochures from different insurers.
Co-Payment vs Deductible
| Feature | Co-Payment (Co-Insurance) | Deductible |
|---|---|---|
| Structure | Percentage of the bill | Fixed dollar amount |
| Applies | After the deductible is met | Before any insurer payout |
| Frequency | Every claim after deductible | Once per policy year |
| 2026 rider minimum | Combines into S$6,000/yr floor | Cannot be covered by rider at all |
| Scales with bill size | Yes | No — always the same fixed amount |
The Bottom Line
For Singapore policyholders, co-payment is the percentage-based half of hospitalisation cost-sharing that survives even the most comprehensive Integrated Shield Plan rider — and the 2026 increase to a S$6,000 minimum means every policyholder should re-check their actual out-of-pocket exposure rather than assuming their rider means a fully covered hospital stay.
Frequently Asked Questions
What is co-payment in Singapore health insurance?
Co-payment (or co-insurance) is the percentage of a hospital bill, typically 3% to 10%, that a policyholder pays after their deductible has been met, with the remainder covered by MediShield Life and any Integrated Shield Plan.
What is the new co-payment minimum from April 2026?
MOH requires all Integrated Shield Plan riders to impose a minimum co-payment of at least S$6,000 per policy year, up from S$3,000 previously, and riders can no longer cover the base deductible at all.
Is co-payment the same as a deductible?
No. The deductible is a fixed dollar amount paid first, once per policy year. Co-payment is a percentage of the bill that applies on every claim after the deductible has been cleared.
Can my Integrated Shield Plan rider still reduce my co-payment?
Yes, riders can still reduce your co-insurance percentage significantly, but from 1 April 2026 your combined minimum out-of-pocket cost across a policy year cannot fall below S$6,000, even with a rider.
Why did Singapore introduce a minimum co-payment for riders?
MOH found that riders offering 100% first-dollar coverage were linked to higher claim frequency and larger average claims, a pattern regulators describe as moral hazard, which was pushing up premiums for all policyholders in the insurance pool.
Does co-payment apply to MediShield Life alone, without an Integrated Shield Plan?
Yes. MediShield Life’s own co-insurance tiers apply to every Singaporean and Permanent Resident, whether or not they hold a private Integrated Shield Plan on top.