Medi-Cal Share of Cost, Explained for Families Looking at Assisted Living

The Department of Health Care Services (DHCS), which runs Medi-Cal, defines a share of cost as the amount you must pay or promise to pay to a provider for health or dental care before Medi-Cal starts to pay. The approval notice from the county, called a Notice of Action, says whether a person has one and how much it is.

DHCS describes how it works. The amount resets each month. You pay it only in months when you get care. It is owed to the doctor, pharmacy or other provider, not to Medi-Cal or the state, and a provider may let you pay over time.

California Advocates for Nursing Home Reform (CANHR), a nonprofit that publishes consumer fact sheets, suggests thinking of it as a monthly deductible. Its 2026 fact sheets also use a newer name for the same thing, shared monthly cost, so you may see either term.

A share of cost is about income. Older adults and people with disabilities whose countable income is at or under 138 percent of the federal poverty level get Medi-Cal at no cost. DHCS's 2026 chart puts that at $1,836 a month for one person and $2,490 for a couple. CANHR's fact sheet, updated April 9, 2026, says a person above the limit may owe a share of cost.

The math is simple and the result is often large. CANHR explains that the county subtracts a maintenance need from countable income, and the rest is the share of cost. The maintenance need is $600 a month for one person and $934 for a couple. In CANHR's example, a single person with countable income of $1,900 has a share of cost of $1,300.

Countable income is not the same as gross income, and assets are tested separately. Both are covered in our guide to Medi-Cal asset and income rules. The 2026 figures in this guide are:

Medi-Cal does not pay the monthly bill in an assisted living community or a board and care home, licensed in California as a residential care facility for the elderly (RCFE). The main exception is the Assisted Living Waiver, and it has a strict entry rule. CANHR's waiver fact sheet says participants must be eligible for full-scope Medi-Cal with no share of cost.

That rule matters for anyone whose income is over the limit: a person with a share of cost cannot enroll until it is brought to zero. Our guide to the Medi-Cal Assisted Living Waiver covers the rest of the program, including the waitlist.

A share of cost can also affect how a person gets care. DHCS notes that in some counties a person with a share of cost cannot enroll in a Medi-Cal managed care plan.

There is a deduction made for people who live in licensed care homes. A DHCS letter to counties dated April 28, 2026 reminds them how to apply it. The letter says a resident of a qualifying licensed residential facility who receives personal care services is entitled to the greater of two deductions, so that the share of cost is as low as possible:

• A standard deduction of $315 for personal care services.
• The excess maintenance need: the amount paid for board and care minus the aged and disabled program income standard. In the letter's 2026 example, a resident paying $2,250 a month has $2,250 minus $1,836, or $414, deducted.
• Qualifying homes named in the letter include RCFEs, assisted living facilities, memory care facilities and board and care facilities. The home must be licensed, and the county can check the license on the state's facility search.
• The person must be getting personal care, such as help with hygiene, dressing, eating or mobility. Meals, laundry and cleaning alone do not qualify.
• Proof can be an individualized care plan, a physician's statement, the admission agreement or a billing statement. The letter says a prescription is not required.
• A caution for waiver applicants, from CANHR's fact sheet on this deduction: it depends on what the resident pays the home. Room and board under the Assisted Living Waiver is much lower than a private rate, so a share of cost can come back after enrollment. CANHR's advice is to do the math first, with the county.

CANHR's fact sheet describes several things that can lower a share of cost. Which of them apply is for the county Medi-Cal office to work out, and a benefits counselor or legal aid program can help you ask.

Health insurance premiums are subtracted from countable income. CANHR says the most common route is a supplemental dental, vision or Medicare Part D premium, and that the Health Insurance Counseling and Advocacy Program (HICAP) offers free counseling on what is available. Give the county proof of the premium and ask for a recalculation.

Unpaid medical bills can count. DHCS says you may be able to lower a future month's share of cost if you have unpaid medical bills, and that payments to a provider who does not accept Medi-Cal can be credited if you take the receipts to the county.

Married couples and registered domestic partners may have another option when one spouse needs long-term care. See Medi-Cal spousal protection in California. If the county's figure looks wrong, CANHR notes that you can ask for a supervisor's review or request a fair hearing.

The same share of cost shows up differently in each program. With In-Home Supportive Services, the California Department of Social Services explains that any share of cost you have not already paid toward other medical expenses is subtracted from your caregiver's paycheck, and you pay that amount to the caregiver yourself. Our comparison of IHSS and assisted living has more.

The Program of All-Inclusive Care for the Elderly has its own payment rules for people with and without Medi-Cal. See PACE programs in California.

A nursing home works differently again. CANHR explains that a resident pays most of his or her income to the facility each month and keeps a personal needs allowance of $35, and Medi-Cal covers the remaining cost. The $600 maintenance need does not apply there.

Hamssa Benrekia is a senior living placement specialist in Torrance who works with families in the South Bay and Harbor area of Los Angeles County. She does not calculate a share of cost, decide Medi-Cal eligibility or enroll anyone in a program: that is the county's work. She can talk through your relative's care needs and real monthly budget and which local homes may fit, including a board and care home. To start, contact Hamssa. The full series is in the California Assisted Living Placement Guide.