What Costs Should You Include When Comparing Jobs?
Commute, benefits gaps, taxes-as-estimated, and other costs that change the real value of an offer.
Salary is the headline, not the ledger
When comparing jobs, the number on the offer letter is only one row in a longer table. Costs and benefits on either side of that row can shift thousands of dollars per year without changing the job title. Building a complete list keeps “more money” from meaning “less left over.”
Everything below should be estimated with your real quotes and pay stubs where possible. WorthCheck job comparisons organize these inputs for learning: they are not payroll forecasts or tax returns.
Taxes and payroll deductions
Gross salary does not equal spendable cash. Include:
- Federal income tax withholding (depends on filing status and W-4)
- State and local income tax: rates vary; moving states can swing net pay significantly
- FICA (Social Security and Medicare)
- Pre-tax deductions: health, dental, vision, FSA/HSA, commuter benefits, retirement contributions
A $10,000 raise in a high-tax state with expensive health coverage may net far less than the same raise elsewhere. Use last year’s effective tax rate as a rough guide until you refine.
Health care and related benefits
Compare plans at the tier you would actually choose (not the cheapest on paper if it has a deductible you would avoid using). Model:
- Employee premium per pay period
- Deductible and out-of-pocket maximum
- Expected usage if you have ongoing prescriptions or planned care
- HSA employer contributions or FSA tax savings
Family coverage differences between employers can exceed $5,000 per year in premium share alone in many markets: illustrative magnitude, not a universal constant.
Retirement and stock
401(k) or 403(b) match formulas matter only if you contribute enough to capture the match and stay long enough to vest. Sign-on equity or RSUs carry vesting schedules, tax at vest, and market risk: many planners treat unvested equity as uncertain when comparing guaranteed base pay.
Commute and mobility costs
Count the full commute burden for each worksite:
- Fuel, maintenance, and depreciation from extra miles (AAA-style per-mile estimates can help benchmark)
- Tolls, parking, transit passes
- Time cost if reduced hours affect paid child care or side income
- Remote/hybrid reduction: estimate office days × daily commute cost
A 30-mile round trip five days per week adds fuel and wear quickly compared to a walkable role or remote schedule.
Relocation and cost-of-living change
If a job requires moving, compare:
- Rent or mortgage for equivalent housing
- Utilities, insurance, and state/local tax differences
- Travel back to family or support network
- Spouse or partner income impact if the move affects their employment
Bureau of Labor Statistics regional price parities and consumer expenditure data provide broad context on how far a dollar stretches: pair public data with local listing sites for your neighborhood target.
One-time and irregular items
- Signing bonus (taxed) vs. relocation reimbursement (may be taxable; read policy)
- Equipment stipends or required home office setup
- Professional licensing, union dues, or continuing education the role expects you to pay
- Clothing or tools if industry norms differ
Opportunity costs
Leaving a job may mean forfeiting unvested retirement match, unused PTO payout (policy-dependent), or deferred compensation. Starting fresh can reset seniority-based benefits. These are not monthly bills but they belong in a fair comparison.
Sample comparison snippet (USD, estimated monthly)
| Line | Current job | New offer |
|---|---|---|
| Gross base (monthly) | $6,667 | $7,500 |
| Estimated take-home | $4,850 | $5,200 |
| Employee health premium | $180 | $320 |
| Commute (fuel, parking) | $120 | $310 |
| Estimated spendable after health & commute | $4,550 | $4,570 |
Higher gross, nearly flat spendable: a pattern worth catching before accepting.
Checklist before you decide
- List every recurring deduction on your current pay stub.
- Request benefit summaries and premium tables from both employers.
- Map commute or housing change with realistic monthly dollars.
- Separate guaranteed pay from bonus and equity.
- Run WorthCheck or a spreadsheet with conservative assumptions.
Including costs when comparing jobs is not pessimism: it is how you choose an offer that still works after the first paycheck, not just on signing day.
Related tool
- Comparing a job offer: Compare take-home pay, benefits, and work costs, not base salary alone.