What growth rate should I use?

7% nominal matches long-run S&P 500 returns. 6% is conservative if you're heavy in bonds or have a mix. 8% is plausible but optimistic looking forward. Avoid using above 8%; last decade's tech-heavy returns aren't a safe baseline. The growth rate is the most sensitive input in the compound — a 1% difference over 25 years moves the output by 25-30%.

Does the tool account for lost employer 401(k) match?

Not directly — it models only the salary-derived savings gap. If the new employer offers a worse match (or a waiting period), add the annual match loss to the savings loss. For example: losing a 4% match on $115k = $4,600/yr lost, which adds roughly another $340k of retirement-year deficit over 27 years at 7%.

How do I handle equity compensation in the new role?

Run the tool twice. First, assume equity = $0 (pessimistic). Second, assume a specific equity outcome (e.g., $60k/yr over 4 years for a growth-stage startup) and add it to new-role salary. The honest answer lives between the two. For high-variance equity, use the RSU vs. Salary calculator to model upside and downside scenarios.

What if the new role has a promotion path the current one doesn't?

Model a scenario where you project a larger comp jump in year 2-3 at the new company than your linear current path. If you expect a $30k comp bump in year 3 at new co, that's 22 years of $30k × savings-rate compounding ahead, which usually more than offsets the early-year pay cut.

How accurate is the compound math?

The math is exact for constant contributions, constant returns, and constant tax treatment. Real returns are not constant; the tool gives you a reasonable central estimate but any single future could vary by 20-40% from the projection. Use it as a decision frame, not a promise.

Should I delay the career change until later?

Maybe. A pay-cut career pivot at 38 has 27 years to recover; at 55 it has 10. The breakeven case that pencils at 38 often does not pencil at 55. If you're within 10-15 years of retirement, the savings-compounding deficit matters more and you need a much higher-probability upside case to justify the move.

Yes. The calculator runs entirely in your browser. Salary and savings numbers are never sent to a server. Export the PDF if you want a record to share with a financial advisor or partner; otherwise closing the tab wipes everything.

Retirement Switch Calculator

A 20% pay cut now is worth much more than 20% at retirement

The most expensive career mistake I see in coaching conversations isn't taking a pay cut — it's failing to price the pay cut correctly. A $15,000 annual pay cut at age 35 with a 15% savings rate and 25 years of 7% growth costs you roughly $142,000 at retirement, not the $375,000 of cumulative lost salary you'd calculate from straight multiplication. The compounding cuts both ways: less compensation means less savings, and less savings compounds into much-less retirement.

But the inverse is equally true — a $15k pay cut that leads to a $40k raise within three years (because the new role has real growth trajectory) nets positive to retirement, and by a wide margin. The calculator isn't telling you whether to switch; it's telling you what the switch costs you at retirement if everything else stays constant. If the new role has faster comp growth, the math flips.

Run the tool with your real numbers. Then run it a second time assuming the new role pays you $10-20k more than your current trajectory within 3-4 years. That's the honest decision frame: is the pay cut a temporary trough on the way to a better long-term comp curve, or is it a permanent downshift?

How to use the tool

Enter your current salary and the new salary being offered. The savings-rate input is the percentage of gross you currently save — most comfortable savers hit 10-15%, FIRE-track savers push 25-50%. If the pay cut would force you to cut your savings rate entirely (not just proportionally), the math is worse than the tool shows; enter the combined effect as a lower savings-rate input.

Years to retirement is the compounding horizon. A 35-year-old looking at 30 years is in a very different spot than a 55-year-old with 10. Growth rate defaults to 7% (roughly the long-run S&P nominal return); 6% is conservative, 8% is optimistic. I'd avoid modeling above 8% for planning purposes — the last decade's returns were unusually strong.

The output shows the annual savings you'd lose and the compounded cost at retirement. The chart shows year-by-year accumulation of the gap. A $15k cut × 15% savings rate = $2,250/year of missed savings. Compounded for 25 years at 7%, that stack is worth ~$142,000.

When taking the pay cut still makes sense

Most pay-cut moves I've coached fall into one of four categories. The first two usually net positive over the horizon; the second two are traps.

Career pivot toward a higher-ceiling track. Going from marketing ops at $120k to a product management IC role at $105k. Short-term: down $15k. Long-term: PM roles typically cap $50-80k higher than ops roles. Net positive by year 4-5.
Startup equity bet with real upside. Leaving a $130k corporate job for a $105k role at a Series B with real equity. Long-term: equity pays out or doesn't. Base-case bet is a wash; upside case is a 3-5x on the pay cut.
Lateral to a better manager / better team. Taking $10k less to work for a manager who'll actually promote you. This one is trickier — if the promo comes within 18 months, net positive. If it doesn't, you've paid $10k/yr for 3 years and you still need to job-hunt again.
Burnout escape to "anything less stressful." The danger category. You feel miserable now, you take a softer role with a 20% pay cut, and six months later the new role is also stressful and you've lost $20k of retirement compounding. Address the burnout first; the job might not be the problem.

The real math — a working example

Jamie is 38, earns $135k at a cybersecurity firm, saves 18% including 401(k) match, has 27 years to retirement, and expects 7% growth on the portfolio. She's offered $115k at a healthcare AI startup with equity she's discounting to $0.

Step 1: annual savings loss. $20k pay cut × 18% = $3,600/yr of missed savings.

Step 2: compound at 7% over 27 years. Future value factor = ((1.07^27) - 1) / 0.07 ≈ 74.48. So $3,600 × 74.48 ≈ $268,000 at retirement.

Step 3: compare to the career-path upside. If the healthcare AI firm promotes her to Director in 30 months with a comp jump to $180k (base + refresh equity), she'd be earning $45k/year more than her linear career path from year 3 onward. Over 24 years post-promotion at 18% savings and 7% compounding: $45k × 18% × (~50.7 FV factor) ≈ $410,000 of incremental retirement.

Net: the upside case nets $142k positive to retirement. The base case (no promo) nets $268k negative. Whether the move makes sense depends entirely on her honest probability estimate of the upside case landing. If she thinks it's 60%+ likely, take the role. If it's 40% or less, stay put or negotiate harder.

The sneakiest cost: interrupted 401(k) match

Pay cuts often come with employer changes, and employer changes often come with 401(k) match loss. If your current employer matches 6% of salary and you've been fully vesting, switching to a new job with a 6-month eligibility waiting period before match kicks in costs you real money — roughly 3% of gross compensation for that year. On a $115k salary, that's $3,450 of forgone match, compounded for 25+ years.

Plus, a chunk of your current match may be unvested. Many plans vest over 2-4 years. If you're leaving in year 2 of a 4-year vesting schedule, you forfeit 50% of employer contributions. Ask for the vesting statement before you make the decision — the typical mid-career worker leaves $8-20k of unvested match on the table when they switch jobs.

Negotiation lever: some employers will waive eligibility waiting periods for senior hires. Ask explicitly. If denied, ask for a sign-on bonus equal to the expected first-year match ($6,900 in the $115k × 6% example). Recruiters can often find that number in sign-on budget when they can't find it in base.

The emotional accounting problem

Most people overvalue the current paycheck versus future savings because the paycheck is immediate and the retirement account is abstract. A $15k pay cut feels like a $15k wound; a $142k retirement deficit 25 years out feels theoretical. That's backwards. The $142k is 9.5x as big, and if you're on a tight retirement glide path, it's the number that matters.

The mental move that helps: translate the pay cut into monthly retirement income. A $268k retirement deficit at a 4% safe withdrawal rate is about $10,700/year of lost retirement income — $890/month for life, starting at 65 and continuing 30+ years. Ask yourself: would I take a job that paid $890/month less forever in order to get this role? If yes, the move is worth it. If no, the present-bias is tricking you.

When the calculator understates the cost

Three scenarios where the real damage is worse than the tool shows.

Savings rate drops proportionally more than salary. Your fixed costs (rent, loans, childcare) don't drop with your salary. A 15% pay cut might force savings to 5% instead of 15% — tripling the damage vs. the linear assumption.
Roth conversion opportunities lost. Lower income years let you convert Traditional 401(k) to Roth at lower tax rates. If the pay cut is very temporary (under 2 years) you'd normally capture this; if it persists, you lose that optionality.
Social Security earnings record hit. SS benefits are calculated on the top 35 years of earnings. If the pay-cut years replace higher-earning years in your top 35, your SS check drops. For most workers this is $50-200/month for life, so $15-60k of present-value damage.

Running the tool during an actual job decision

Do it twice. First run: honest numbers, conservative assumptions, no upside baked in. That gives you the floor — the cost if the new role turns out to be just a different job at lower pay. Second run: optimistic numbers — higher savings rate at the new company (if the work-life balance is better and you can save more), and a projected promotion or raise within 3 years. That gives you the ceiling.

The decision usually lives between the two numbers. If the floor cost ($X of retirement) is survivable and the ceiling (upside-case outcome) is significantly positive, take the role. If the floor is catastrophic and the ceiling is only mildly positive, stay put. Most people in the middle of a comp cut conversation only run the optimistic version, which is how they end up with $200k retirement deficits nobody warned them about.