Section 80DDB and Tax Relief on Immunotherapy Costs — What You Can Actually Claim

A resident individual, for themselves or a dependant — spouse, children, parents, brothers or sisters mainly dependent on them. A Hindu undivided family can claim for a member. The person claiming must be the person who actually paid. Non-residents cannot claim Section 80DDB at all, whatever they remit.

Section 80DDB of the Income Tax Act, 1961 is not a cancer scheme and it is not an immunotherapy scheme. It is a deduction for money actually paid to treat a disease listed in Rule 11DD of the Income-tax Rules, 1962, and malignant cancers are on that list. That is why immunotherapy given as part of cancer treatment qualifies: the deduction attaches to the disease, not to the drug.

Two tests decide the claim, and families routinely fail the second one without realising it. First, the person claiming must be resident in India for that year. Second, they must have actually paid the money, for themselves or for a dependant. A generous relative who transfers funds is not automatically the person who paid, and the bill alone does not settle the question — the bank trail does.

For families where one earner lives abroad, this ordering matters more than the amount. Decide who pays before the bills are settled, not afterwards. Our companion guide, Paying for a Parent’s Immunotherapy From Abroad, walks through how remittances, hospital accounts and the paper trail usually get arranged.

The lower of what you actually paid and the ceiling. That ceiling is ₹40,000, or ₹1,00,000 if the patient is 60 or above. The limit follows the patient’s age, not yours. It reduces taxable income, so the cash value is the deduction multiplied by your slab rate.

This is where the page has to be blunt. A course of immunotherapy runs into lakhs. The deduction is capped in the tens of thousands. It will not decide whether treatment is affordable, and any page that suggests otherwise is selling something. What it does is return real tax on money the family has already spent — and for a household stretched to its limit, a few thousand rupees recovered is not nothing.

Three details change the number in practice. The ceiling is set by the patient’s age, so a 40-year-old taxpayer paying for a 68-year-old mother uses the ₹1,00,000 ceiling, not the ₹40,000 one. Anything an insurer settles or an employer reimburses comes off first, because the section only recognises what your family finally bore. And the deduction is against income, not against tax, so the same claim is worth about two and a half times more at the 30 per cent slab than at 20 per cent.

A note on scheme cover, for completeness. Where a government scheme such as Aarogyasri pays for a package up to a scheme-defined ceiling, that portion was never your expenditure, so it cannot also be your deduction. Scheme ceilings cap what the scheme pays, not what the treatment costs. Confirm the current package position with the treating hospital’s scheme desk; nothing here is a coverage guarantee.

A prescription from a specialist, not a form. Form 10-I was withdrawn in 2015. For malignant cancers, Rule 11DD requires a prescription from an oncologist holding a DM in Oncology or an equivalent recognised degree, carrying the patient’s name and age, the disease, and the specialist’s registration number and qualification.

This is the part of Section 80DDB that quietly defeats most families, and it is the reason this page exists. Until 2015, the claim needed Form 10-I, and that form had to come from a specialist working in a government hospital. Both requirements are gone. A specialist in a private hospital can issue the prescription today, and there is no numbered form to chase. But the change was never explained to patients, so families either give up or arrive at their accountant with a discharge summary and a stack of bills, which is not what the rule asks for.

Ask for it early. A medical oncologist — the specialist who prescribes and supervises immunotherapy — ordinarily holds the DM in Oncology the rule names, so the document is usually a request, not a hurdle. CION’s medical oncologists hold DM qualifications in medical oncology, and immunotherapy here is administered as day care, so the treating team sees the patient every cycle and can issue the prescription during a routine review rather than months later.

One practical warning. The prescription is dated, and it is tied to a patient and a disease — not to a financial year’s worth of bills. Get it while the patient is under active treatment. Reconstructing it a year later, from a different hospital, is where families lose the claim entirely.

Only the old regime. The new regime under Section 115BAC has been the default since assessment year 2024-25, and it does not allow Section 80DDB. A family that files without actively choosing the old regime loses the deduction by default, not by decision. Run both computations before you file.

This single fact undoes more 80DDB claims than any paperwork problem. Section 80DDB sits in Chapter VI-A of the Income Tax Act, and the new regime removes almost all Chapter VI-A deductions in exchange for lower slab rates. Because the new regime is now the default, doing nothing is itself a choice — and it is the choice that throws the deduction away.

The right answer is not automatic. For a household with a home loan, insurance premiums and a large medical year, the old regime often wins. For a younger earner with few deductions, the new regime’s lower rates can win even with a cancer bill in the year. The only reliable method is to compute both, for the specific financial year in which the treatment payments fall, and then choose. That is an hour of an accountant’s time against a deduction worth up to about ₹31,200 in tax.

Three, mainly. Section 80D covers health insurance premiums and medical spending on an uninsured senior citizen. The proviso to Section 17(2) keeps an employer’s reimbursement for a prescribed disease out of taxable salary. And any reimbursement received reduces the Section 80DDB claim.

• Section 80D — health insurance premium. Up to ₹25,000 for a policy covering you and your family, and up to ₹50,000 where the person insured is a senior citizen. Old regime only, and premiums must be paid other than in cash.
• Section 80D for an uninsured senior citizen. Where a senior-citizen parent holds no health insurance policy at all, medical expenditure on them can be claimed up to ₹50,000. It is a separate route from 80DDB, and the same rupee cannot be sent down both.
• The proviso to Section 17(2) — employer reimbursement. A sum paid by an employer for treatment of a prescribed disease at an approved hospital is not taxed as a perquisite, provided the hospital certifies the disease and the receipt is produced. Ask your employer’s finance team whether the hospital qualifies.
• Reimbursement reduces the 80DDB claim. Whatever an insurer settles or an employer repays is subtracted first. The deduction recognises only what your family finally bore, which is why the insurer’s settlement letter belongs in the same file as the bills.
• There is no separate immunotherapy deduction. Relief is disease-based, not drug-based. Nothing in the Act treats immunotherapy differently from other cancer treatment, and no page or agent that claims otherwise should be believed.
• Scheme cover is not tax relief. If Aarogyasri or another scheme paid a package up to its ceiling, that money was never your expenditure. Scheme ceilings are confirmed with the treating hospital’s scheme desk, and nothing here guarantees cover.
• The bill must be traceable to the person claiming. Hospital receipts, the payment mode and the bank statement should tell one consistent story. This is the part families cannot rebuild later.

Start on the day treatment starts, not in June. You need the specialist’s prescription under Rule 11DD, itemised dated hospital bills, proof that you personally paid, and the settlement statement from any insurer. Four documents, collected as you go, decide whether the claim survives a query.

1. 1

   Ask for the Rule 11DD prescription at the first or second cycle

   Name and age of the patient, the malignant cancer named as such, and the oncologist’s registration number and DM qualification on the same page. Not at filing time — now.

2. 2

   Ask for itemised, dated bills in one consistent name

   Drug, day-care administration, monitoring bloods and consultations on separate lines. Response-assessment scans are coordinated at partner imaging centres and billed by them, so keep those receipts too.

3. 3

   Pay in a way that leaves a trail

   The section does not prescribe a payment mode, but a bank or UPI record in the claimant’s name is what answers a query two years later. Cash paid at a counter is the hardest thing to prove.

4. 4

   Get the insurer’s settlement letter in writing

   You need the exact amount reimbursed, because it is subtracted before the ceiling is applied. A verbal figure from a desk is not a document.

5. 5

   Decide the regime with both computations in front of you

   Old versus new, for the financial year in which the payments actually fall. The new regime is the default, so this has to be an active decision at filing.

If money is deciding the treatment, say so in the consulting room. A treating team can plan around a stated constraint — it cannot plan around cycles that are quietly delayed. Choosing not to start, or to stop, is a legitimate decision that deserves an honest conversation, not a tax calculation.

The deduction recovers tax on money already spent. It does not change what treatment costs. These pages cover the three things that do move the number — what a full course actually comes to, how centres differ on price, and how a family abroad can fund and coordinate it.

• Immunotherapy Cost in India: What a Full Course Actually Comes To — how a course is built up cycle by cycle, and the lines that sit outside the drug quote.
• Comparing Immunotherapy Costs Between Centres: What to Check — how to compare two estimates fairly, and which differences are real rather than presentational.
• Paying for a Parent’s Immunotherapy From Abroad — remittances, who should hold the hospital account, and why that decision affects the deduction.
• Immunotherapy at CION Cancer Clinics — how eligibility review, day-care treatment, monitoring and cost counselling fit together as one pathway.

Decisions for Healing, Not Billing

We put the whole number in front of you first, in writing and dated, so the decision stays with your family.