GST for hospitals: when to issue a Tax Invoice vs a Bill of Supply
Healthcare services are largely GST-exempt, but a single hospital bill often mixes exempt and taxable line items in one visit. Getting the Tax Invoice / Bill of Supply split wrong is one of the most common findings in a GST audit of a hospital.
Most hospital administrators know, in broad terms, that healthcare is exempt from GST. What trips billing teams up is that "exempt" doesn't mean "no GST anywhere on the bill" — it means specific line items are exempt while others, sitting in the same invoice, are fully taxable. A patient admitted for three days might have an exempt consultation, an exempt diagnostic test, a partly-taxable room charge, and a taxable pharmacy purchase, all needing correct treatment on the same bill.
What's actually exempt, and what isn't
Health care services provided by a clinical establishment, an authorised medical practitioner, or paramedics are exempt under the relevant GST exemption notification. In practice, that covers:
- Doctor consultation and nursing care
- Diagnostic tests and imaging performed as part of treatment
- OT charges and procedure fees
- Standard room and ICU charges within the exempt threshold
What is not automatically exempt, even though it appears on the same hospital bill:
- Room rent above the notified per-day threshold (excluding ICU) — taxable following the 2022 GST Council changes.
- Retail pharmacy sales to outpatients not connected to their own treatment — taxed at the applicable drug GST slab, same as any pharmacy.
- Cafeteria and canteen sales to visitors — a straightforward taxable supply, unrelated to patient care.
- Parking and other ancillary services offered to the public rather than as part of a patient's treatment.
Tax Invoice vs Bill of Supply: what CGST Rule 49 actually requires
A Tax Invoice is the document for a taxable supply — it shows the GST charged and is what a GST-registered buyer needs to claim input tax credit. A Bill of Supply, under CGST Rule 49, is issued instead of a Tax Invoice specifically when the supply is wholly exempt, or when the supplier operates under the composition scheme. It carries no GST line at all.
A hospital, in effect, needs to issue both documents depending on the line item — sometimes within the same patient visit. An inpatient bill combining an exempt room charge, an exempt consultation, and a taxable pharmacy purchase from the in-house pharmacy needs the taxable portion split out onto its own Tax Invoice, while the exempt portion goes on a Bill of Supply. Billing software that treats the whole visit as one undifferentiated invoice either overcharges GST on exempt care or fails to charge it on a taxable item — both are audit findings.
Why this becomes a demand-notice risk, not just a paperwork inconvenience
Two failure directions carry different consequences. Charging GST on an exempt service overcharges the patient and creates a refund headache if caught, but is the less serious error from the tax authority's perspective. Failing to charge GST on a taxable item — most commonly, missing the above-threshold room-rent rule — is a genuine short-payment of tax, and GST audits specifically look for exactly this pattern in hospital billing because it's a well-known point of confusion.
Where OneCity fits
OneCity's billing module classifies every line item at the point of billing — exempt healthcare service, taxable room-rent excess, taxable pharmacy sale, taxable ancillary charge — and automatically routes the bill to a Bill of Supply, a Tax Invoice, or both where a single visit needs to be split. HSN/SAC codes are assigned per line item rather than left to manual entry, and for hospitals whose taxable turnover crosses the government's e-invoicing threshold, the relevant taxable invoices generate an IRN through the standard e-invoice flow.
None of this replaces the hospital's own GST practitioner for filing and interpretation — GST treatment of specific edge cases (bundled packages, health camps, corporate tie-ups) genuinely needs professional judgment. What the software should do is make sure the routine, high-volume cases — the ones that generate 95% of a hospital's bills — are classified correctly by default, rather than depending on a billing clerk making the right call under pressure at the counter.
Frequently asked questions
Are hospital services exempt from GST in India?
Health care services provided by a clinical establishment, an authorised medical practitioner, or paramedics are exempt from GST under the relevant exemption notification. That covers consultation, nursing, diagnostic tests done as part of treatment, and OT charges. It does not automatically cover every line item on a hospital bill — retail pharmacy sales, cafeteria charges, and certain room rent are treated differently.
When must a hospital charge GST on room rent?
Following the 2022 GST Council changes, room rent charged by a hospital above a specified per-day threshold (excluding ICU) became taxable, while ICU rooms and rent below the threshold remain exempt as part of the health care service. Because this line sits inside an otherwise-exempt bill, it's the single most common point where hospitals miss a GST obligation they actually have.
What is the difference between a Tax Invoice and a Bill of Supply under GST?
A Tax Invoice is issued for a taxable supply and shows GST charged. A Bill of Supply, under CGST Rule 49, is issued instead of a Tax Invoice when the supply is wholly exempt, or when the supplier is registered under the composition scheme — it does not show any GST amount. A hospital bill that mixes an exempt consultation with a taxable pharmacy sale needs to handle both documents correctly, sometimes on the same visit.
Does a hospital need e-invoicing for its billing?
E-invoicing (IRN generation) applies to taxable B2B supplies once a business crosses the government's notified turnover threshold — it is not generally required for wholly exempt Bill of Supply transactions. A hospital with taxable pharmacy or room-rent revenue above the threshold should confirm with its GST practitioner whether e-invoicing applies to those specific taxable supplies.