You typed "how much does an overnight caregiver cost" because the nights have stopped working. Here is the plain answer for a family in west St. Louis County: there is no single number, and anyone who gives you one before they know Mom's night is guessing. What you pay for overnight help is set by a short list of things you can learn yourself, tonight, before you make a single call. The biggest one is how many times Mom gets out of bed, and what she needs on each trip from the bed to the toilet.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
So this piece does not quote a figure. It shows you what drives the cost, how to size the shift to your mother's actual night, and what to ask so the quote you get matches the help she needs.
What it costs: The Missouri median for non-medical in-home care is $33 an hour, per the CareScout (Genworth) Cost of Care Survey 2025 state data tables, released March 2026. New Plan Care's standard rate is $34 an hour with a four-hour minimum, so a visit starts at $136 (newplancare.com/services).
The four things that set the price
Awake or asleep. Agencies usually price an overnight shift one of two ways. An awake shift means the caregiver stays up all night, alert, ready at the bedside the moment Mom stirs. A sleeping shift means the caregiver may rest in the home and gets up when called. A sleeping arrangement only fits a night where Mom wakes rarely and the caregiver can still reach her before she stands. If Mom is up three or four times and falls mostly on the walk to the bathroom, ask whether the agency would even offer a sleeping shift, and why.
Length of the shift. Many agencies set a minimum number of hours per visit. Ask what that minimum is, and whether the hours you actually need, say from the time Mom goes to bed until she is up for breakfast, fit inside one shift or spill into a second.
How many nights. A few nights a week costs differently than every night. Ask whether the rate changes with the number of nights, and whether weekends or holidays are billed differently.
What the job includes. Walking beside Mom to the toilet, helping her stand, helping with clothing, changing a wet nightgown, giving a medication reminder, settling her back into bed. These are non-medical tasks, and some agencies match the caregiver level to them. Ask which tasks are included and whether any of them change the rate.
Size the shift before you ask for a quote
Take two or three nights and keep a plain log on the nightstand. You do not need anything fancy. For each time Mom gets up, write:
The time she woke. Whether she called out or just started to move. How long it took her to sit up and stand. Which of the six stops on the route was hardest: the edge of the bed, the first step, the doorway, the hall, the bathroom door, the toilet itself. Whether she needed a hand, a steadying arm, or just someone watching. How long until she was back in bed.
That log is what turns a vague price question into a real one. If Mom wakes once and walks the route steadily, you are pricing something very different from a night where she is up every two hours and catches the doorframe each time. Bring the log to the call. Read it out. Let the agency size the shift to it rather than to a general idea of "overnight."
What to ask on the call
Write these down and ask every agency the same questions, so you can compare them side by side:
Do you offer awake overnight shifts, sleeping shifts, or both, and which would you recommend for the night I just described? What is the minimum shift length? Is the rate different for awake versus sleeping? Does it change for weekends or holidays? Will the same caregiver come each night, or will it rotate? What happens if the caregiver cannot come, and how much notice will I get? Is there a charge for the first assessment visit? What is the cancellation rule if I need to stop or change the schedule? Are your caregivers employees of the agency, and who covers their insurance?
The answers to the last few questions matter as much as the rate. A lower price that leaves you without coverage on the night the caregiver calls off is not lower.
What the help looks like at 3am
A non-medical overnight caregiver is there for exactly the walk you are worried about. When Mom stirs, the caregiver is beside the bed before she stands. They make sure the light is on, the walker is in reach, and her feet are in the right footwear. They walk the route with her, stop by stop, and wait outside or help inside the bathroom as she prefers. They help her back into bed and note the time. If Mom has a fall or something seems wrong, they call you and, when needed, emergency services. They can give a medication reminder at the right hour, but the medicine itself stays with you, her doctor and her pharmacist.
In the morning you get what you have been trying to collect yourself: a written note of how many times she got up and how each trip went. Bring those notes to her physician. Questions about why she wakes so often belong there.
How to get it started
Keep the log for two or three nights. Call two or three agencies that serve your part of the county and ask the same questions of each. Ask for an in-home assessment, and walk the assessor along the full route from bed to toilet at the time of night it matters. Start with a trial of a few nights before you commit to a schedule.
The local help page lists where to start in St. Louis, and if a fall has just happened, go back to the first ten minutes first. What to write down tonight: the time of every trip, the hardest stop, and the question you most need answered on the first call.