Co-insurance Singapore refers to the percentage of a claimable hospital bill that a policyholder still pays after insurance has covered its share. It exists by design because Singapore’s health insurance system requires policyholders to keep some cost responsibility whenever they make a claim.
Many policyholders assume that an Integrated Shield Plan, also known as an IP, means they pay nothing when hospitalised. Even a private hospital IP leaves part of the claimable bill to the policyholder. That share may come from the deductible, co-insurance Singapore, or rider co-payment, depending on the plan structure.
The way policyholders pay changed from 1 April 2026, when the Ministry of Health’s updated rider design requirements took effect. These rules changed what new riders can cover, but they did not remove the basic structure of deductibles, co-insurance, co-payment, riders, and MediSave use.
Key takeaways
- An Integrated Shield Plan does not pay 100% of every hospital bill on its own.
- A rider is a separate cash-paid add-on that can reduce the policyholder’s out-of-pocket share.
- Hospital bills are usually settled in this sequence: deductible first, then co-insurance or rider co-payment.
- The co-insurance or co-payment percentage applies after the deductible, not to the full claimable bill.
- The annual co-payment cap usually depends on using a panel doctor or obtaining pre-authorisation.
- MediSave can help pay the deductible and co-payment, subject to CPF withdrawal limits.
- Employer insurance, personal accident insurance, critical illness insurance, and disability income insurance may further reduce the financial impact.
MediShield Life coverage, Integrated Shield Plan, and rider
MediShield Life, Integrated Shield Plans, and riders form three separate layers of health insurance protection in Singapore. These layers determine which part of a hospital bill insurance pays and which part remains the policyholder’s responsibility.
MediShield Life is the compulsory national health insurance scheme for Singapore Citizens and Permanent Residents. MediShield Life coverage applies to subsidised treatment in public hospital B2 and C wards and includes its own deductible and co-insurance Singapore.
An Integrated Shield Plan is an optional private insurance upgrade that sits on top of MediShield Life. It increases claim limits and extends coverage to higher public hospital wards, such as B1 or A wards, or to private hospitals, depending on the plan tier. An Integrated Shield Plan does not reimburse 100% of the bill on its own. The policyholder still pays the deductible and co-insurance.
A rider is a separate add-on attached to an Integrated Shield Plan. Policyholders usually pay rider insurance premiums in cash. A rider historically reduced out-of-pocket costs close to zero by absorbing the deductible and lowering the policyholder’s co-payment. When policyholders say their Shield Plan “covered everything”, they usually mean the rider reduced most of the remaining bill.
This distinction matters because the 2026 Integrated Shield Plan changes apply mainly to what riders can cover. The core structure remains the same: MediShield Life coverage provides the national base layer, the Integrated Shield Plan upgrades coverage, and the rider reduces the policyholder’s remaining share. Anyone doing an integrated shield plans comparison should start with these three layers before looking at premiums.
Deductible, co-insurance, and co-payment
Deductible, co-insurance, and co-payment describe three different parts of a hospital bill. Insurers apply them in a specific order, so policyholders need to understand the relationship between the fixed deductible and the percentage-based payment.
| Term | What it is | Typical figure |
| Deductible | The first fixed slice of the bill that the policyholder pays each policy year before the insurer pays | S$1,500 to S$3,500, varying by ward class |
| Co-insurance under MediShield Life | A percentage of the claimable amount after the deductible, on the MediShield Life-covered portion | 3% to 10%, decreasing as the bill grows |
| Co-insurance under an IP | The percentage the policyholder pays on the IP-covered portion when there is no rider | 10% under the standard IP structure |
| Co-payment | The policyholder’s residual share once a rider applies | Minimum 5% for post-2026 IP riders |
The deductible is not one universal amount. MOH sets minimum deductible amounts for Integrated Shield Plans, and the deductible depends on both the plan tier and the ward class used.
The deductible resets each policy year. This means the policyholder usually clears the deductible once per policy year rather than once per admission.
Co-insurance and co-payment are related but not the same. The applicable rate depends on which insurance layer pays the claim. Under MediShield Life, co-insurance Singapore ranges from 3% to 10% and decreases as the bill grows. On the portion covered by the Integrated Shield Plan itself, co-insurance is a flat 10% when the policyholder has no rider.
This distinction matters because it determines how much of the claimable bill remains payable after the deductible. The IP’s flat 10% co-insurance is not subject to the tiered reduction that applies under MediShield Life.
The 5% co-payment applies to Integrated Shield Plan riders. MOH introduced this minimum rider co-payment so that riders cannot reduce the policyholder’s share to zero. If a policyholder has an IP without a rider, the policyholder remains exposed to the IP’s co-insurance structure. If a policyholder has a rider, the rider reduces the share to the required co-payment floor.
Read more: What Singapore’s 2026 IP Rider Means for Policyholders
How co-insurance and co-payment stack in a worked example
Co-payment applies after the deductible has been removed from the claimable bill. The order matters because the percentage does not apply to the full bill.
Consider Mr. A, a 60-year-old Singaporean with a private hospital IP and a new rider that meets MOH’s post-2026 design requirements. Three years after switching to the new rider, Mr. A undergoes knee joint replacement surgery at a private hospital. He incurs a claimable bill of $56,900, with a $3,500 deductible and a 5% rider co-payment floor.
- The deductible applies first. The policyholder pays the first $3,500.
- The remaining claimable bill is $53,400, calculated as $56,900 minus $3,500.
- The rider co-payment applies to the remaining $53,400. A 5% co-payment equals $2,670.
- Mr. A’s total share is $6,170, calculated as $3,500 plus $2,670. According to MOH’s illustration, this amount is entirely covered by MediSave, subject to applicable withdrawal limits.
| Bill breakdown if Mr. A undergoes knee joint replacement surgery at a private hospital* | IP + existing rider | IP + new rider |
| Hospital bill | $56,900 | |
| Base IP payout1 | $48,060 | |
| Rider payout | $6,000 | $2,670 |
| Paid by Mr. A2 | ||
| IP deductible3 | $0 | $3,500 |
| Co-payment | $2,840 | $2,670 |
| MediSave | $2,840 | $6,170 |
| Out-of-pocket cost (after MediSave) | $0 | $0 |
Source: MOH
*Figures may not add up due to rounding.
1This includes the MediShield Life payout, as an IP comprises MediShield Life coverage, which is sized for subsidised treatment at B2 and C wards in public hospitals, and additional private insurance coverage for private hospitals and higher-class wards in public hospitals, depending on the plan.
2Payable by MediSave up to applicable withdrawal limits.
3The IP deductible is a fixed amount payable each policy year before insurance starts to pay out. This example assumes that it is the patient’s first claim in his policy year.
Over time, Mr. A may receive rider premium savings, with annual savings likely to increase as premiums rise with age. This matters because rider premium savings may accumulate across many years, while hospitalisation or day surgery may occur only occasionally for an average 60-year-old.
The insurer covers the remaining $48,060 as the base IP payout, which includes the MediShield Life component, per MOH’s illustration. This example shows why the deductible and co-payment should not be treated as one figure. The deductible applies first, and the percentage applies only to what remains.
How rider insurance changes what you pay
An Integrated Shield Plan rider changes the policyholder’s out-of-pocket share by reducing the percentage payable and, where conditions are met, limiting the total co-payment for the year. This rider insurance function is separate from the base IP benefit.
Without a rider, the policyholder may need to pay the full deductible plus the IP’s co-insurance, which is a flat 10% of the covered bill with no upper limit. With a rider, the policyholder’s share may fall to the minimum 5% co-payment floor.
The rider also provides protection against very large bills through an annual co-payment cap. This cap prevents the percentage-based co-payment from increasing without limit, provided the policyholder meets the insurer’s conditions.
The 2026 Integrated Shield Plan changes affect how much a new rider can absorb. New riders sold from 1 April 2026 cannot cover the minimum deductible, and the annual co-payment cap increased from S$3,000 to S$6,000. The core function remains the same: a rider changes the policyholder’s exposure from uncapped co-insurance Singapore to a lower co-payment structure that may be capped when the policyholder follows the insurer’s rules.
Panel doctors, pre-authorisation, and the co-payment cap
The Integrated Shield Plan co-payment cap is usually conditional. Policyholders need to understand this condition because it can significantly change the final amount they pay for a large hospital bill.
The annual co-payment cap does not always apply automatically. Insurers usually require the policyholder to use a panel doctor or obtain pre-authorisation before a planned admission. When the policyholder meets these requirements, the co-payment for the year can remain capped.
If the policyholder uses a non-panel doctor without pre-authorisation, the insurer may remove the cap. The 5% co-payment rate may still apply, but the total co-payment can continue to accumulate without a ceiling.
This rule creates a direct relationship between provider choice and financial exposure. On a large hospital bill, a capped co-payment may limit the policyholder’s share to a few thousand dollars. An uncapped co-payment can create a much larger cash outlay. The 2026 rule changes adjusted the cap amount for new riders, but they did not remove the importance of panel doctors and pre-authorisation.
Paying your share with MediSave and other insurance
MediSave and other insurance policies can reduce the cash amount a policyholder pays for an Integrated Shield Plan deductible or co-payment. These sources do not remove the payment responsibility, but they can help fund it.
MediSave can pay both the deductible and the co-payment, subject to CPF withdrawal limits. These limits depend on the type of treatment and the applicable withdrawal category. Inpatient admissions and day surgeries may use different daily limits, while surgical limits depend on the procedure.
MediSave withdrawal limits cap how much can be used per admission. They do not guarantee that MediSave will cover the full deductible and co-payment. For smaller bills, MediSave may absorb most of the policyholder’s share. For larger bills, the policyholder may still need to pay a cash balance after MediSave is applied.
In Singapore, employer hospitalisation insurance, Personal Accident insurance, Critical Illness insurance, and Disability Income insurance can support Integrated Shield Plan policyholders by reducing the cash impact of deductibles and co-payments.
- Employer or group hospitalisation insurance may reimburse the deductible and co-payment left by the IP and rider.
- Personal Accident insurance may cover hospitalisation costs that arise from accidents.
- Critical Illness insurance provides a lump sum payout on diagnosis, which the policyholder can use for hospital bills, recovery costs, or income replacement.
- Disability Income insurance replaces part of the policyholder’s income if illness or injury prevents the policyholder from working.
The headline co-payment amount is not always the final cash amount. MediSave, employer benefits, and other insurance policies can reduce the amount the policyholder pays directly.
Read more: 3 Real Hospitalisation Bills in Singapore and How MediSave and Insurance Reduce Costs
The bottom line
Co-insurance Singapore is the policyholder’s percentage share of a claimable hospital bill after insurance benefits apply. It is not a penalty or a loophole. It is part of Singapore’s health insurance structure.
Policyholders should understand three relationships. First, the deductible applies before any percentage-based payment. Second, co-insurance Singapore applies when the policyholder does not have a rider, while rider co-payment applies when the rider reduces the remaining share. Third, the co-payment cap usually depends on using a panel doctor or obtaining pre-authorisation.
MediSave and other insurance policies can reduce the actual cash outlay, but they do not remove the need to understand the bill structure. Policyholders who know how deductibles, co-insurance, riders, caps, and MediSave interact can make clearer decisions before hospitalisation and avoid unexpected costs.
Read more: How To Choose the Right Hospitalisation Plan in Singapore
Frequently asked questions
What is the difference between deductible, co-insurance, and co-payment?
The deductible is the fixed first slice of the bill that the policyholder pays each policy year. Co-insurance is the percentage of the claimable bill that remains payable after the deductible, such as the 3% to 10% co-insurance under MediShield Life. Co-payment is the residual percentage share that applies when a rider reduces the policyholder’s payment, subject to the minimum 5% rider co-payment floor.
Is the co-payment cap on top of the deductible?
Yes. The co-payment cap applies to co-payment only. It does not include the minimum deductible. The policyholder’s total exposure is the deductible plus the capped co-payment, and the cap holds only when the policyholder uses a panel doctor or obtains pre-authorisation.
Can MediSave cover Integrated Shield Plan co-payment?
Yes. MediSave can pay both the deductible and co-payment, subject to CPF withdrawal limits. These limits may not cover the full amount on a large bill, so the policyholder may still need to pay part of the bill in cash.
Does using a non-panel doctor change my share?
Yes, it can. The annual co-payment cap usually depends on using a panel doctor or obtaining pre-authorisation. If the policyholder uses a non-panel doctor without pre-authorisation, the insurer may remove the cap, and the co-payment can continue to accumulate without a ceiling.
