Is it worth adding a 4th work day when childcare costs apply?

It depends on your income, CCS rate, and childcare fees. Adding a 4th day earns extra income (taxed at your marginal rate) but costs a 4th day of childcare (after CCS). The key number is: after-tax pay from the extra day minus the net childcare cost for that day. If positive, the extra day pays off financially.

How does CCS change when you add a 4th day of work?

Working a 4th day typically increases your annual income, which can reduce your CCS percentage (the rate tapers at 1% per $5,000 above $85,279 in 2025-26). At the same time, the extra work day may also shift your activity test hours, potentially increasing your subsidised hours entitlement if you were previously below the 100-hour threshold.

What is the effective cost of a 4th day of childcare?

Effective cost = childcare daily fee × (1 - CCS rate). For example, if your daily fee is $140 and your CCS rate is 75%, the effective cost is $140 × 25% = $35/day. Compare this to your after-tax earnings from the extra day of work to determine if the day is financially worth it.

Is it Worth Working a 4th Day? CCS Cost Analysis

5 min read Updated 2 March 2026

costsincomeCCS Explainedhoursreturn to work

I've asked myself this question more than once.

Is it actually worth going back to 4 days a week?

On paper it sounds simple. More hours. More income.

But once you factor in tax, childcare fees and how Child Care Subsidy (CCS) changes when your income goes up… it isn't always straightforward.

Quick Answer: Is It Worth Working 4 Days a Week After Childcare?

For many families, a 4th day of work leaves them $40 to $150 better off per week after tax and childcare.

But it depends on:

Your combined family income
Your CCS percentage
Your childcare fees
Whether your CCS rate drops as income increases

The 3-Day Guarantee Changes the Equation (2026 Update)

From January 2026, the CCS 3-Day Guarantee means families with lower activity hours automatically receive a minimum of 72 subsidised hours per fortnight (roughly 3 x 12-hour days per week). This matters for the 4th-day question: if you currently receive the 3-day minimum and add a 4th work day, you may cross into the 72-hour entitlement tier — potentially increasing subsidised hours significantly. This can make the 4th day MORE financially viable than older calculations suggested.

Small income changes can slightly reduce your CCS rate — which affects all your childcare days, not just the extra one.

That's why it's important to run the numbers properly.

What Actually Changes When You Add a 4th Day?

When you increase from 3 to 4 days of work, four things usually change:

Your gross income increases
Your income tax increases
Your childcare fees increase
Your CCS percentage may reduce

Most families only look at the first one.

The real question is:

How much do we actually keep after everything?

How CCS Changes When You Earn More (2025-26 / 2026 Rules)

Under current rules:

The maximum CCS rate is 90%
Your subsidy percentage reduces gradually as income increases
The reduction is roughly 1% for every $5,000 of additional income above the lower threshold
CCS tapers down to 0% at higher income levels

The system doesn't usually create sudden "cliffs" where you lose everything at once. It mostly tapers.

But even a 1% drop applies across all your childcare hours.

If you use multiple days of care, that small percentage shift can make a noticeable difference.

A Simple Example

Let's say:

Your 4th day earns $320 before tax
After tax, you take home around $220
Your out-of-pocket childcare cost for that extra day is $150

That leaves about $70 for the week.

Now imagine your higher income reduces your CCS rate by 1%.

If that adds another $20 per week to your overall childcare cost, your real gain might be closer to $50.

Some families are comfortable with that.

Others decide it isn't worth the juggle right now.

See the real weekly difference for your family

Premium's "+1 day per week" calculator models your exact income, CCS rate and childcare fees — then shows what you'd actually keep if you (or your partner) worked one extra day. No guessing, no spreadsheets.

Model your extra day

Check Your Activity Hours First

Before deciding, confirm whether you're entitled to:

72 hours per fortnight (3-Day Guarantee), or
100 hours per fortnight

If you already receive 100 subsidised hours, adding a 4th work day doesn't increase your CCS hours. It simply increases usage.

That detail changes the maths significantly.

What If You're Close to a CCS Threshold?

If your income is near the next taper band, working more could:

Slightly reduce your CCS percentage
Increase out-of-pocket costs across all childcare days
Affect reconciliation at tax time

It doesn't mean you shouldn't work more.

It just means assumptions can be wrong if you don't test the scenario.

The Part That Isn't Just Financial

For many working parents, the 4th day is also about:

Career momentum
Superannuation
Staying visible at work
Long-term earning power

And sometimes it's about:

Mental load
Energy
Logistics
Whether the marginal gain feels worth the trade-offs

The numbers matter.

But clarity matters more.

So… Does It Pay to Work an Extra Day With CCS?

Sometimes yes.

Sometimes the real gain is smaller than expected.

The only reliable way to know is to compare:

Current situation (3 days) vs Scenario with 4 days

Model your actual income, childcare fees and CCS rate under the 2025-26 / 2026 rules.

Once you see the true weekly difference after tax and childcare, the decision usually becomes much clearer.

It's not about whether 4 days is "right."

It's about knowing your real outcome before you decide.

Compare 3 days vs 4 days — side by side

Premium's Scenario Comparison lets you set up two complete scenarios (different days, fees, income) and compare the after-tax, after-childcare result. You'll see the exact weekly and annual difference — so the decision makes itself.

Unlock Scenario Comparison

This is general guidance only. Report all changes (income, relationship, care arrangements) promptly via myGov. For personalised advice, contact Services Australia at 136 150 or visit servicesaustralia.gov.au/child-care-subsidy.

From 5 January 2026, the 3 Day Guarantee provides at least 72 subsidised hours per fortnight for all eligible families. Activity below 48 hours does not reduce you below this minimum. Always confirm your approved hours in myGov.