Cancer’s out-of-pocket costs open the door to several tax breaks for cancer patients that most filers never touch. The biggest is the itemized deduction for unreimbursed medical expenses above 7.5% of your adjusted gross income. Beyond that, Health Savings Accounts, tax-free access to life insurance, penalty-free retirement withdrawals, disability-related credits, and careful handling of crowdfunding and settlements can each shrink what you owe in a treatment year.
The Medical Expense Deduction Is the Main Lever
Unreimbursed medical costs are deductible on Schedule A of Form 1040, but only if you itemize and only for the portion that exceeds 7.5% of your AGI.1Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses2Internal Revenue Service. Topic No. 502, Medical and Dental Expenses Itemizing means giving up the standard deduction, so the trade only pays if your itemized total clears it. For 2026, the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
The 7.5% floor is a real hurdle. On a $100,000 AGI, the first $7,500 of medical spending produces nothing. Spend $40,000 on treatment and $32,500 becomes deductible. At a $120,000 AGI with $25,000 in qualifying costs, the deduction is $16,000. Run the numbers both ways before filing.
What Counts
Qualifying expenses cover the diagnosis, treatment, or prevention of disease when no one reimbursed you. For cancer that means chemotherapy, radiation, surgery, hospital stays, prescription drugs, lab work, imaging, and specialized medical equipment. A few less obvious items count too. Wigs bought on a doctor’s advice for a patient who lost hair to treatment qualify. Home modifications like ramps or widened doorways qualify to the extent their cost exceeds any increase in the home’s value: a $10,000 ramp that adds $4,000 of value produces a $6,000 deduction.4Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses – Section: Capital Expenses Nursing services and stays at therapeutic care facilities also qualify.
Anything paid by insurance, an FSA, or an HSA cannot be deducted again. Only true out-of-pocket dollars count.
Travel, Lodging, and Mileage
Getting to treatment counts. You can deduct actual gas and oil or use the 2026 standard medical mileage rate of 20.5 cents per mile, and tolls and parking are deductible on top.5Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents Lodging away from home for treatment is deductible up to $50 per night per person, and that cap covers both the patient and one necessary companion, so a parent traveling with a child can claim up to $100 a night. Meals during travel don’t qualify, but meals provided during an inpatient hospital stay do.6Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses – Section: Meals
Timing Matters
Because of the 7.5% floor, bunching discretionary medical spending into a heavy treatment year gets more of your total across the line. Dental work, larger prescription fills, new eyeglasses, and elective procedures done in the same calendar year as cancer treatment all add to the deductible amount above the floor. Split across two years, neither may clear it by much.
Health Savings Accounts
If you’re enrolled in a high-deductible health plan, an HSA is one of the most tax-efficient ways to pay for treatment. Contributions are deductible (or pre-tax through payroll), balances grow tax-free, and withdrawals for qualifying medical expenses are never taxed. The 2026 contribution limits are $4,400 for self-only coverage and $8,750 for family coverage, plus a $1,000 catch-up at age 55.7Internal Revenue Service. IRS Notice 26-05, HSA Inflation Adjustments for 2026
Each dollar of expense gets one tax benefit or the other, not both. Costs paid with HSA funds cannot be deducted on Schedule A. For expenses that fall below the 7.5% floor anyway (where a deduction would be worth nothing), paying from the HSA is usually the smarter route. One eligibility note: once you enroll in Medicare or drop your high-deductible plan, you can no longer contribute, though existing balances still come out tax-free for medical use.
Life Insurance You Can Access While Alive
A terminal cancer diagnosis unlocks the death benefit early, and the payments are generally tax-free. Federal law treats amounts received from a life insurance policy on the life of a terminally ill individual the same as death benefits for tax purposes.8Office of the Law Revision Counsel. 26 USC 101 – Certain Death Benefits The IRS defines “terminally ill” as a physician’s certification that the illness can reasonably be expected to result in death within 24 months.
Selling the policy to a licensed viatical settlement provider works the same way: the proceeds are excluded from gross income if you meet the terminal illness definition and the provider is properly licensed in your state (or meets the NAIC model act where the state doesn’t require licensing).9Office of the Law Revision Counsel. 26 U.S. Code 101 – Certain Death Benefits Chronically ill (not terminally ill) individuals can also qualify, but only for payments covering actual long-term care costs not otherwise reimbursed.
Penalty-Free Retirement Withdrawals
Pulling from a 401(k) or IRA before 59½ normally adds a 10% penalty on top of income tax. The IRS waives that penalty for the portion of a withdrawal used to pay unreimbursed medical expenses above 7.5% of AGI.10Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions With a $9,000 floor and $15,000 in qualifying expenses, $6,000 of the withdrawal escapes the penalty. The withdrawn amount is still taxed as ordinary income; the exception saves the 10%, not the income tax.
Claim the exception on Form 5329 using code 05. A separate exception covers the full withdrawal if you become totally and permanently disabled, whatever the money is spent on.
Disability-Related Credits and Deductions
Cancer that leads to lasting disability opens up a second set of provisions. Credits cut tax dollar-for-dollar, so they’re worth more than a same-size deduction.
Credit for the Elderly or Disabled
Filed on Schedule R, this credit is available to taxpayers under 65 who have retired on permanent and total disability, certified by a physician that you cannot engage in any substantial gainful activity.11Internal Revenue Service. Credit for the Elderly or the Disabled The base amount depends on filing status: $5,000 single or joint with one qualifying spouse, $7,500 when both spouses qualify, and $3,750 for married filing separately.12Internal Revenue Service. 2025 Instructions for Schedule R (Form 1040) Nontaxable Social Security or pension income and AGI above set thresholds reduce that base, and the remainder is multiplied by 15%. It’s nonrefundable, so it can zero out tax due but won’t produce a refund on its own.
Additional Standard Deduction for Blindness
Some cancers and treatments cause permanent vision loss. Filers who are legally blind on the last day of the year get an extra standard deduction: $2,050 for unmarried filers and $1,650 for married filers (each spouse who qualifies) in 2026.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill It stacks with the age-65 additional amount and is available whether you itemize or not.
How Disability Income Gets Taxed
Social Security Disability Insurance is only partially taxable and often not taxable at all. The IRS uses “provisional income” (AGI plus tax-exempt interest plus half your SSDI). Single filers under $25,000 and joint filers under $32,000 pay nothing on benefits. Above those, up to 50% becomes taxable; above $34,000 single or $44,000 joint, up to 85%.13Internal Revenue Service. Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits
Private disability follows a cleaner rule. Employer-paid premiums make the benefits taxable. Premiums you paid yourself with after-tax dollars make the benefits tax-free. Split premiums produce a split result, with only the employer-paid portion taxed.
Claiming the Patient as a Dependent
Family members carrying most of a patient’s costs can sometimes claim the patient under the qualifying relative test, which has three parts.14Internal Revenue Service. Dependents – Section: Qualifying Relative
- Gross income test: the patient’s gross income must be under $5,300 for 2026. Nontaxable amounts like most SSDI benefits or tax-free life insurance proceeds don’t count against the limit.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
- Support test: you provide more than half of the patient’s total support for the year (food, housing, medical, clothing, other necessities).
- Relationship or household test: the patient is a qualifying relative under the code (parent, sibling, child, in-law, others) or lived in your household all year.
Success here brings the Credit for Other Dependents, a nonrefundable credit worth up to $500.15Internal Revenue Service. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information If the patient is physically or mentally unable to care for themselves and lives with you more than half the year, and you pay for care so you can work or look for work, the Child and Dependent Care Credit may also apply. Eligible expenses are capped at $3,000 for one qualifying individual or $6,000 for two or more, with the credit at up to 35% of that.16Internal Revenue Service. Publication 503 (2025), Child and Dependent Care Expenses
Life Insurance Proceeds and Legal Settlements
A death benefit paid to a beneficiary is excluded from the beneficiary’s gross income, so a full policy payout arrives free of federal tax.8Office of the Law Revision Counsel. 26 USC 101 – Certain Death Benefits
Legal settlements are more nuanced. Damages received for physical injuries or physical sickness are excluded from income.17Office of the Law Revision Counsel. 26 USC 104 – Compensation for Injuries or Sickness Amounts allocated to lost wages, to emotional distress not rooted in physical injury, or to punitive damages are fully taxable. Emotional distress damages can be excluded, but only up to the amount actually paid for medical care related to that distress.18eCFR. 26 CFR 1.104-1 – Compensation for Injuries or Sickness The allocation language in the settlement agreement drives the tax result, so it’s worth negotiating that wording carefully before signing.
Crowdfunding and Personal Fundraising
Money from a GoFundMe or similar campaign is often nontaxable, but the treatment isn’t automatic. The IRS has said contributions made out of “detached and disinterested generosity,” where the donor gets nothing in return, may qualify as nontaxable gifts.19Internal Revenue Service. Money Received Through Crowdfunding May Be Taxable; Taxpayers Should Understand Their Obligations and the Benefits of Good Recordkeeping Most personal medical fundraisers meet that standard.
Reporting is where people trip up. Crowdfunding platforms are third-party settlement organizations and must issue a Form 1099-K when payments exceed $20,000 across more than 200 transactions.20Internal Revenue Service. Understanding Your Form 1099-K Getting a 1099-K doesn’t make the money taxable; it means the IRS sees it, and you need records showing gift treatment. Contributions from an employer to or for an employee are generally taxable income even when routed through a campaign. Keep records of each donation’s source and the campaign’s terms so you can back up the gift treatment if the IRS asks.