Cost of living comparison · updated September 2026
Boise, Idaho vs Newcastle, New South Wales: cost of living
The modeled monthly cost is the same in Boise, Idaho and Newcastle, New South Wales for one person with a balanced setting. Use the category view below to see where the two budgets still differ.
Read the result in context
Start with the total, then inspect the categories and household scenarios before you turn the percentage into a salary or relocation decision.
The short answer
The modeled monthly cost is the same.
Both cities land at $2,990 in the balanced one-person model. The category breakdown still shows where the two baskets differ.
No difference in the balanced model.
Illustration for $6,500 take-home pay in Boise, Idaho.
$150 separates the two category estimates.
Direct answer
What does the difference mean each month?
The estimated monthly budget is $2,990 in Boise, Idaho and $2,990 in Newcastle, New South Wales. That is a difference of no modeled difference before personal adjustments.
This comparison keeps the same household and lifestyle on both sides. It answers one narrow question: what happens when the same recurring basket is repriced in another city? It does not decide which neighborhood, salary, tax system or lifestyle will fit you best.
Monthly cost breakdown for Boise, Idaho and Newcastle, New South Wales
| Category | Boise, Idaho | Newcastle, New South Wales | Difference |
|---|---|---|---|
| Housing | $1,600 | $1,450 | −$150 |
| Groceries | $500 | $540 | +$40 |
| Dining out | $170 | $200 | +$30 |
| Transport | $115 | $120 | +$5 |
| Home utilities | $155 | $165 | +$10 |
| Internet & mobile | $60 | $65 | +$5 |
| Insurance & protection | $15 | $20 | +$5 |
| Healthcare | $85 | $100 | +$15 |
| Medicines & pharmacy | $25 | $30 | +$5 |
| Personal care | $20 | $25 | +$5 |
| Clothing & footwear | $30 | $35 | +$5 |
| Household goods | $15 | $20 | +$5 |
| Household services | $25 | $30 | +$5 |
| Fitness & wellness | $70 | $75 | +$5 |
| Entertainment & subscriptions | $45 | $50 | +$5 |
| Leisure | $60 | $65 | +$5 |
| Total | $2,990 | $2,990 | Same |
Where the comparison changes most
Housing is the largest modeled pressure point, but the order matters for your own decision. Check the first four categories below before you spend time optimizing smaller lines.
Housing
Boise, Idaho $1,600 · Newcastle, New South Wales $1,450 · $150 lower in Newcastle, New South Wales
Home size, tenure and neighborhoodGroceries
Boise, Idaho $500 · Newcastle, New South Wales $540 · $40 higher in Newcastle, New South Wales
Household size, diet and routineDining out
Boise, Idaho $170 · Newcastle, New South Wales $200 · $30 higher in Newcastle, New South Wales
Meal frequency and local restaurant pricesHealthcare
Boise, Idaho $85 · Newcastle, New South Wales $100 · $15 higher in Newcastle, New South Wales
Appointments, dental care and out-of-pocket treatmentSalary translation
A cost difference is not automatically a salary offer.
If you take home $6,500 in Boise, Idaho, repricing the same balanced basket in Newcastle, New South Wales implies about $6,500 per month. The difference is $0, but your gross offer can move differently after tax, benefits, pension and employer coverage.
Current take-home$6,500Boise, Idaho
→
Spending-equivalent$6,500Newcastle, New South Wales
Use the salary calculator for your own income, household and lifestyle settings.
Open salary calculatorHousehold scenarios
The gap changes when the household changes.
Housing and food do not scale in exactly the same way for every household. These balanced scenarios show how the recurring comparison moves when the same city pair is used for one person, a couple or a family.
HouseholdBoise, IdahoNewcastle, New South WalesDifference
One person$2,990$2,990Same
Couple$4,630$4,630Same
Family of four$6,580$6,580Same
Use the result correctly
A comparison narrows the decision. It does not make it for you.
Replace broad assumptions with the details that actually determine your move. The closer the headline totals are, the more important those details become.
Price the neighborhoodUse the home size, lease terms and commute you would really choose.
Translate take-home payCompare net income and benefits, not only gross salary.
Check your marginLook at what remains after core costs, savings and recurring obligations.
Keep the date visiblePrices, exchange rates and housing markets change at different speeds.
Comparison FAQ
Questions that change the answer.
Use these checks when the headline percentage looks surprising or when the two cities appear unusually close.
Which city is more expensive, Boise, Idaho or Newcastle, New South Wales?
The modeled balanced basket is the same in both cities at $2,990 per month for one person.
How much salary would I need in Newcastle, New South Wales?
If you currently take home $6,500 per month in Boise, Idaho, the spending-equivalent estimate for Newcastle, New South Wales is $6,500. This is a budget translation, not a market salary prediction or a tax calculation.
What changes the Boise, Idaho and Newcastle, New South Wales comparison most?
Housing has the largest modeled difference at $150 per month. Housing, transport and household size can outweigh smaller category changes, so replace those assumptions first.
Why is the reverse percentage different?
The forward percentage uses Boise, Idaho as the base. Reversing the comparison uses Newcastle, New South Wales as the base, so Boise, Idaho is 0% more expensive in the reverse statement. Both calculations can be correct because the denominator changes.
Do these city estimates include taxes or moving costs?
No. The comparison covers recurring living categories in USD equivalent. Income tax, benefits, savings, debt, childcare, education, deposits, visas and one-time moving costs need to be added for your situation.