Babysitting an infant is not harder than babysitting an older child — but it is different in ways that matter. An infant can't tell you what's wrong. They can't follow instructions or wait a few minutes. Their safety during sleep depends entirely on how you set up the crib. And most of the things that go wrong are not emergencies — they're just situations nobody talked through before the parents left.
This guide covers what every sitter needs to know before the parents walk out the door: safe sleep, feeding, handling a crying baby, diapering, and when to make the call. It also covers what parents should prepare — because a sitter working from clear, written instructions is safer than one trying to remember a rushed verbal rundown.
Why infants are different from older children
With a toddler or school-age child, most babysitting friction comes from behavior and routine. With an infant, it comes from communication and safety.
Infants cannot tell you they're hungry, tired, in pain, or too hot. They communicate through crying, and the same cry can mean half a dozen different things. This isn't a problem you can solve with experience alone — it's a problem you solve with good information from the parents before they leave.
The other difference is sleep. Safe sleep guidelines for infants are specific, research-backed, and non-negotiable. An older child sleeping in the wrong position or with a stuffed animal is not a safety concern. For an infant, it can be.
Neither of these makes babysitting an infant something to avoid. They make preparation the most important part of the job.
Before the parents leave: what to confirm
The ten minutes before the parents walk out the door are the most important ten minutes of the job. Use them.
Feeding
Get the exact schedule: how often does the baby eat, how much at each feed, and what are you feeding them? If formula, get the ratio and confirm how the parents warm it. If breast milk, find out where it's stored, how to thaw it if frozen, and how to warm it — breast milk has specific handling rules that differ from formula. Don't assume.
Sleep setup
Confirm where the baby sleeps, and walk to the room together. Check that the sleep surface is firm and flat, and that the crib is clear of anything that shouldn't be there. If the parents have a monitor, make sure you know how it works before they leave.
Emergency contacts
Get both parents' numbers, a local backup (a neighbor, grandparent, or family friend who can be at the house quickly), and the pediatrician's number for non-emergency questions. Write these down or confirm they're already on a babysitter info sheet somewhere visible — not only in your phone. Phones die. Screens lock.
Medical notes
Ask if the baby has any allergies, conditions, or medications. If there's a condition that requires medication or a specific response — reflux, colic, a known allergy — know the protocol before the parents leave, not when the situation is happening. A printable medical consent form for minor in your family's emergency kit is also worth having, so a sitter can authorize care if parents are unreachable.
The baby's current state
When did the baby last eat? When did they last sleep? Are they going through anything — a developmental leap, a cold, unusual fussiness? This context changes your first hour significantly.
Safe sleep rules for infants
These are not preferences. They are the guidelines that significantly reduce the risk of SIDS and sleep-related infant death.
- Always place the baby on their back. Every sleep, every time. Not on their stomach. Not on their side. Back.
- Use a firm, flat surface. A crib or bassinet with a firm mattress and a fitted sheet is the right sleep environment. Not a couch, bouncer, swing, or car seat used as a sleep substitute.
- Keep the sleep space clear. No loose blankets, pillows, bumper pads, or stuffed animals in the crib. If the baby is cold, use a sleep sack — not a blanket.
- Room temperature should be comfortable. Dress the baby as you'd dress yourself for the room, plus one light layer. Overheating is a risk factor.
- If the baby falls asleep somewhere else, transfer them. A baby who falls asleep in your arms, in a bouncer, or in a swing should be moved to the crib. These are not safe sleep surfaces for unsupervised sleep.
If parents give instructions that conflict with these guidelines — asking you to put the baby down on their stomach, for example — it's reasonable and appropriate to explain that you're not comfortable doing that, and to follow safe sleep practice. You are not obligated to do something that puts an infant at risk.
Feeding basics
How you feed an infant depends entirely on what they're being fed and what the parents have told you. Don't improvise.
Formula
Follow the parents' instructions for the ratio exactly. Most formula is mixed at a standard ratio (one scoop per two ounces of water), but some infants are on a different concentration for medical reasons. Use the brand the parents have. Warm it in a bowl of warm water or a bottle warmer — not a microwave, which heats unevenly and can burn the baby's mouth. Test the temperature on your wrist before feeding.
Breast milk
Fresh breast milk stored in the fridge is used first. Frozen milk is thawed by placing the container in warm water — never use a microwave or boiling water. Once thawed, it can't be re-frozen. Leftover breast milk from a feeding should be used within two hours or discarded. Follow whatever the parents have written down; breast milk handling varies more than formula.
Feeding cues vs. schedule
Most parents will give you a rough feeding schedule. Use it as a guide, but also watch for hunger cues: rooting (turning the head and opening the mouth), sucking on hands, fussiness before full crying. A baby showing hunger cues before the scheduled time usually means you feed early. A clock is less reliable than the baby.
Burping
Burp the baby midway through a feed and again at the end. Hold them upright against your shoulder and pat or rub their back gently. Some babies burp quickly; some take a few minutes. If they don't burp after a few minutes, it's fine to move on. An unburped baby who falls asleep may spit up — keep a cloth nearby.
How much is enough
Follow the parents' instructions. General guidance: most newborns take 2–3 oz per feed; by 2–4 months, 4–5 oz. Overfeeding can cause discomfort and excessive spit-up. If the baby pulls away from the bottle or turns their head, they're done — don't push more.
When the baby won't stop crying
A crying infant is not an emergency. It's communication. Work through the most likely causes in order before escalating.
| Try this | What you're checking |
|---|---|
| Offer a feed | Hunger — the most common reason by far |
| Burp them | Gas or discomfort from a recent feed |
| Check the diaper | Wet or soiled — even a mild rash can cause persistent crying |
| Check temperature | Too hot or too cold — feel the back of the neck, not the hands |
| Hold and move | Overtiredness or overstimulation — walking, rocking, or a gentle bounce often helps |
| Reduce stimulation | A quieter, dimmer room can calm an overstimulated baby |
If you've worked through the sequence and the baby has been crying for more than 20–30 minutes without settling, and you can't identify what's wrong, it is appropriate to call the parents. This is not failure. Parents would rather answer a call than come home to a sitter who struggled through two hours of crying alone.
Never shake a baby. Shaking causes severe, permanent brain damage and can be fatal. If you feel yourself getting frustrated or overwhelmed — which is normal — put the baby down safely in the crib and step out of the room for a few minutes. A crying baby in a safe crib is not in danger. Take the break.
Diapering
Newborns typically need a diaper change every 2–3 hours, or after every feed. Older infants go longer between changes but should still be checked regularly.
What you need
Ask the parents where the diapers and wipes are kept, and whether they use a specific diaper cream. Some babies are prone to rash and need cream applied at every change; others don't. Know before you need it.
How to change safely
Never leave an infant unattended on a changing table, even for a moment. Keep one hand on the baby at all times. If you need something out of reach, bring the baby with you or set them down safely on the floor while you retrieve it.
For girls, wipe front to back. For boys, keep a cloth ready — they tend to urinate the moment the diaper comes off. Fold the dirty diaper closed before disposing of it.
When to call the parents
Parents want to enjoy their time away without constant updates, but they also want to know if something is wrong. The threshold for calling is lower with an infant than with an older child.
Call immediately if:
- The baby has a fever (rectal temperature over 100.4°F / 38°C in infants under 3 months is always a reason to call — and potentially a reason to call 911 or go to the emergency room)
- The baby is not breathing normally or has turned blue around the lips or fingertips
- The baby has had a fall or injury to the head
- You've tried everything and the baby has been crying inconsolably for more than 30 minutes
- Something feels wrong and you can't identify what it is
Call when you have a moment if:
- The baby won't eat after repeated attempts
- There's more vomiting than typical spit-up
- The baby seems unusually lethargic or difficult to rouse
- You're unsure about a medication dose, an allergy, or a medical question
If you can't reach the parents and the situation is serious, call 911 or take the baby to the nearest emergency room. Don't wait.
What parents should prepare before leaving
Most of the problems that happen when babysitting an infant trace back to a handoff that was too rushed or too vague. Parents who take ten minutes to write things down before leaving have better evenings — fewer calls, fewer problems, less stress on the sitter.
A complete handoff for an infant sitter includes:
- Feeding instructions — what, how much, how often, and how to prepare it
- Sleep setup confirmation — where the baby sleeps, what's in the crib, and how the monitor works
- Emergency contacts — both parents, a local backup, and the pediatrician's number
- Medical notes — allergies, conditions, medications with dosing instructions
- The baby's current state — last feed, last sleep, anything unusual
- House rules — whether other children are home, any gates or locks, who's allowed to answer the door
A printed babysitter information sheet that covers all of this — specific to an infant — is more reliable than a verbal summary. The sitter can refer back to it during the evening without calling. It also becomes a reusable reference for every job.
For families who want to go further, a family emergency binder keeps all critical household and medical information in one place — including a printable medical consent form for minor children, which allows a caregiver to authorize medical treatment if parents are unreachable. It's a straightforward document that most families never need but are very glad to have when they do.