You have two job offers on the table. One pays $115,000. The other pays $108,000. The higher base wins, right?
Not always. A $95,000 hospital role with 12% super and $9,010 salary packaging can be worth $6,200 more per year than a $100,000 private-sector role without packaging — and $140,000 more in retirement over a 30-year career.
Base salary alone captures roughly 62% of an offer's real value. The other 38% lives in super contributions, salary packaging tax savings, bonus likelihood, leave, and commute cost. Here is how to compare all six variables — with three worked scenarios that show when the "obvious" higher offer is actually the worse one.
The six variables that move the needle
Every job comparison should cover these six inputs. Miss any one of them and you can be off by thousands per year:
| Variable | Why it matters | Typical impact |
|---|---|---|
| Base salary | Taxed at your marginal rate. The obvious one. | After-tax, $10k more base is $6.3-$7k more cash at $80-135k bracket. |
| Super % | 12% is the legal minimum, but some employers pay 13-15%. | 1% extra at $100k = $94,400 in retirement over 30 years. |
| Bonus | Target × likelihood. Most schemes pay 50-80% of target on average. | $20k bonus at 50% = $10k expected value, taxed at marginal rate. |
| Salary packaging | FBT-exempt employers let you receive salary tax-free up to a cap. | Healthcare cap $11,660 saves $3,300/yr at the 30% bracket. |
| Leave days | 20 is the minimum. Each extra day = your daily rate in value. | 5 extra days at $100k = $1,920/yr. |
| Commute cost | After-tax dollars. $50/week = $2,500/yr in lost take-home. | WFH vs CBD at $50/wk differential = $2,500 swing. |
Enter all six variables for each job. Get a single bottom-line verdict in real dollars — plus the 30-year super gap.
Open Job Offer Comparison CalculatorScenario 1: The super trap
Job A: $100,000 base + 13% super + no bonus. Job B: $105,000 base + 12% super + no bonus.
Job B looks better — $5,000 more base. But:
- Job A super contribution: $13,000/yr. Job B: $12,600/yr. Difference: $400/yr.
- Job B's extra $5,000 base is taxed at 30% (the $45k-$135k bracket), netting $3,500 extra cash.
- Job A's $400/yr extra super over 30 years at 7% real return = $37,784 more in retirement.
In year one, Job B wins on cash by $3,100 ($3,500 extra cash minus $400 less super). Over 30 years, Job A wins by $37,784 in retirement balance. If you're under 40, the super trap probably favours Job A.
Scenario 2: The bonus mirage
Job A: $130,000 flat salary. Job B: $115,000 + $30,000 target bonus at 50% likelihood.
Job B's expected bonus = $30,000 × 50% = $15,000. Total expected gross = $130,000. Looks equal.
But the $15,000 expected bonus sits in the 37% bracket ($135k-$190k range when added to the $115k base), netting $9,450 after tax. Meanwhile Job A's full $130k is certain — no risk discount, no "performance review" dependency.
At equal expected value, certainty wins. Job B needs to offer a higher expected total to compensate for the risk — a concept economists call a risk premium.
Scenario 3: The healthcare packaging edge
Job A: $120,000 at a private company + 12% super. Job B: $108,000 at a public hospital + 12% super + $9,010 general packaging + $2,650 meal entertainment.
Job A looks $12,000 ahead. But Job B's $11,660 of FBT-exempt salary packaging is received tax-free. At the 30% bracket, that saves:
- $11,660 × 30% = $3,498 in annual tax saved
- Plus 2% Medicare levy saved on packaged amount: $233
- Total packaging value: $3,731/yr
After tax, Job A take-home: ~$87,788. Job B take-home: ~$80,748 + $3,731 packaging = ~$84,479. The gap shrinks from $12,000 gross to ~$3,300 after tax. If Job B also offers 25 days leave (vs Job A's 20), the 5 extra days add $2,077 in value — closing the gap to just $1,200.
For nurses, allied health workers, and charity employees, packaging is often the single biggest variable in a job comparison. The job comparison calculator models this automatically — select "Healthcare / hospital" or "Charity / PBI" from the packaging dropdown.
Enter both offers side by side — base, super, bonus, packaging, leave, commute. Single verdict in 60 seconds.
Open Job Offer Comparison CalculatorThe 30-year super gap most comparisons ignore
Every dollar of annual super contribution difference compounds over your remaining career. The future-value-of-annuity formula at 7% real return over 30 years uses a factor of 94.46 — meaning every $1,000/yr in extra super is worth $94,460 at retirement.
At higher incomes the effect is dramatic:
| Annual super gap | Over 20 years | Over 30 years |
|---|---|---|
| $1,000/yr (1% at $100k) | $40,995 | $94,461 |
| $1,500/yr (1% at $150k) | $61,493 | $141,691 |
| $3,000/yr (3% at $100k) | $122,985 | $283,382 |
This is the number that separates a serious job comparison from a napkin calculation. The calculator shows it automatically at the bottom of every comparison.
When to ignore the numbers entirely
If the annual dollar gap between two offers is under $5,000, qualitative factors should dominate the decision: manager quality, team culture, learning trajectory, flexibility, career runway. The financial difference over a 2-3 year job tenure is $10-15k — meaningful but not life-changing.
If the gap is over $15,000/year, it outweighs all but the most extreme qualitative differences. A miserable job that pays $20k more is still a $60k financial advantage over three years — enough to meaningfully accelerate mortgage repayment, super balance, or a career pivot fund.