Retirement Calculator: How Much Do You Need to Retire?

The fundamental retirement question is simple: how much money do you need so that your savings, combined with any pension, cover your expenses for the rest of your life? The answer depends on your spending, expected pension, investment returns, and how long you expect to live.

The retirement formula

Retirement savings needed = (Annual expenses - Annual pension income) x 25

The "x 25" factor comes from the 4% rule: if you withdraw 4% of your portfolio annually (adjusted for inflation), your money historically lasts at least 30 years with a high probability of success.

Example calculation

Marek, age 35, wants to retire at 65:

• Current monthly expenses: 7,000 PLN
• Expected monthly expenses at retirement (today's prices): 6,000 PLN (lower housing costs, no commute, but higher healthcare)
• Annual expenses at retirement: 72,000 PLN
• Expected ZUS pension (projected at 25% of current salary of 12,000 PLN gross): ~3,000 PLN/month net = 36,000 PLN/year
• Annual gap: 72,000 - 36,000 = 36,000 PLN
• Retirement savings needed: 36,000 x 25 = 900,000 PLN (in today's money)

Adjusting for inflation

The 900,000 PLN is in today's purchasing power. At 3.5% annual inflation over 30 years, the nominal amount needed is approximately 2,530,000 PLN. However, if your investments also grow above inflation, the real (inflation-adjusted) target of 900,000 PLN is what matters for planning purposes.

The ZUS pension gap

Projected replacement rates

The replacement rate (pension as % of your last salary) for Poles currently under 50 is projected at:

These projections assume working until the legal retirement age (60 for women, 65 for men) and continuous ZUS contributions. Any gaps in employment reduce the pension further.

The gap is large

If you earn 10,000 PLN gross and your pension replaces 25% of that, you receive approximately 2,500 PLN gross per month. After tax, approximately 2,200 PLN. Most people cannot maintain their lifestyle on 2,200 PLN/month.

The gap between your desired retirement income and your ZUS pension must be filled by personal savings and investments.

How much to save monthly

To accumulate 900,000 PLN (in today's money) by retirement, assuming 5% real return (8% nominal minus 3% inflation):

The exponential increase in required savings per decade of delay is the most powerful argument for starting early. Waiting from 25 to 35 nearly doubles the monthly savings requirement.

Where to save for retirement

Priority 1: IKE (tax-free)

Max contribution: 23,472 PLN/year (1,956 PLN/month). All gains tax-free. This should be your first retirement savings vehicle.

Priority 2: IKZE (tax-deductible)

Max contribution: 9,388.80 PLN/year (782 PLN/month). Tax deduction on contributions, 10% flat tax on withdrawal. Second priority after IKE.

Priority 3: PPK (employer match)

If your employer offers PPK, contribute at least the minimum to capture the employer match (1.5% of salary from employer on top of your 2%). Free money.

Priority 4: Taxable brokerage account

After maxing IKE and IKZE, additional retirement savings go into a regular brokerage account. 19% capital gains tax applies, but there is no contribution limit.

The 4% rule: does it work?

The 4% rule was developed by William Bengen in 1994 based on US stock and bond data. It states that a retiree withdrawing 4% of their initial portfolio value (adjusted annually for inflation) from a 50/50 stock/bond portfolio has historically never run out of money over 30 years.

Caveats for Polish investors:

• The rule was designed for USD-denominated portfolios. PLN-denominated portfolios face additional currency and inflation risk.
• 30 years may not be enough if you retire at 55-60 and live to 90+.
• For greater safety (especially for early retirees), use a 3.5% or 3% withdrawal rate.
• Having flexible spending (ability to reduce withdrawals in bad years) significantly improves success rates.

Beyond the number

Reaching your retirement number is necessary but not sufficient. Also plan for:

• Healthcare costs: Increase significantly with age. Budget for private healthcare and supplemental insurance.
• Long-term care: Nursing home or home care costs in Poland range from 3,000-8,000 PLN/month.
• Inflation surprises: Poland's inflation has been volatile. Build a buffer above your calculated target.
• Sequence of returns risk: A market crash in the first 5 years of retirement is more damaging than one 15 years in. Having 2-3 years of expenses in cash/bonds when entering retirement mitigates this.

Use Freenance to track your progress toward your retirement number. Input your target, current savings, and monthly contributions to see your projected retirement date and whether you are on track.

Related Articles

• IKE vs IKZE Comparison — Maximising tax-advantaged retirement savings
• Asset Allocation by Age — Adjusting your portfolio as retirement approaches
• Bogleheads Three-Fund Portfolio — A simple retirement portfolio

FAQ

How do I calculate my retirement number?

Multiply your expected annual retirement expenses (net of any pension income) by 25. This factor reflects the 4% safe withdrawal rule, where a diversified portfolio has historically supported 30 years of inflation-adjusted withdrawals. Use today's purchasing power for the calculation and let your investments grow in real terms.

Should I use the 4% rule or a lower withdrawal rate?

The 4% rule is a useful starting point but was calibrated for US data and 30-year horizons. If you plan to retire early, expect a long retirement, or want extra safety, a 3% to 3.5% withdrawal rate is more conservative. Flexibility in spending during bad market years also improves long-term outcomes.

How much should I contribute monthly to hit my retirement number?

The required monthly amount depends heavily on your starting age and assumed real return. Starting at 25 might require around 600 PLN per month to reach 900,000 PLN, while starting at 45 can require over 2,000 PLN per month for the same target. The earlier you begin, the more compounding works in your favour.

What if my ZUS pension forecast is lower than I expected?

Treat the official ZUS projection as a baseline, not a guarantee, and assume your replacement rate may be 20 to 40 percent of final salary. Fill the gap with IKE, IKZE, PPK and a taxable brokerage account in that order of tax efficiency. Increasing contributions even slightly each year compounds significantly over decades.

How do I protect my retirement plan from sequence-of-returns risk?

Build a cash and short-duration bond buffer of two to three years of expenses as you approach retirement. This lets you avoid selling equities during market drawdowns in the first years of withdrawals, when portfolios are most vulnerable. Reassess your asset allocation every few years to keep risk aligned with your time horizon.