The Question Every Investor Asks
You have €50,000 saved. Your two best options:
-
Buy a rental property — use your €50k as a 20% deposit on a €250,000 flat, borrow the rest, and collect rent.
-
Invest in the S&P 500 — put all €50k into a low-cost index fund and let compounding do the work.
Both are legitimate wealth-building strategies. But which one actually wins — and under what conditions?
This article runs the numbers across four scenarios using our Leverage vs S&P 500 Calculator.
The Setup
| Parameter | Value |
|---|---|
| Starting capital | €50,000 |
| Property value | €250,000 |
| Mortgage rate | 3.5% (25-year term) |
| Gross rental yield | 5.5% |
| Vacancy + management | 15% |
| Rental income tax | 28% (Portugal baseline) |
| S&P 500 annual return | 10% nominal (historical avg) |
| Capital gains tax (S&P 500) | 28% at exit |
| Time horizon | 20 years |
Scenario 1: Base Case
In the base case, property appreciates at 3%/year and the S&P 500 returns 10%/year.
Property (leveraged):
- Total return after 20 years: ~€310,000 (equity + net rental income)
- Annualised return on invested capital: ~9.5%
S&P 500 (unleveraged):
- Portfolio value after 20 years: ~€336,000 (after 28% CGT at exit)
- Annualised return: ~10% gross, ~8.2% after tax
Winner: S&P 500 — by a narrow margin in the base case, but the difference is within the margin of estimation error.
Scenario 2: Bull Market (Property Boom)
Property appreciates at 5%/year (2010–2019 Portugal average). S&P 500 returns 12%/year.
Property: ~€480,000 total return — the leverage multiplier kicks in hard.
S&P 500: ~€430,000 after tax.
Winner: Property — leverage amplifies the appreciation gain dramatically. A 5× leveraged position on a 5%/year appreciating asset is hard to beat.
Scenario 3: Bear Market
Property stagnates (+1%/year). S&P 500 returns 6%/year (real terms, post-inflation).
Property: ~€180,000 — rental income partially offsets weak appreciation, but mortgage costs bite.
S&P 500: ~€145,000 after tax.
Winner: Property — even in a bear market, the rental income stream provides a floor that pure equity investing lacks.
Scenario 4: 2008-Style Crisis
Property drops 20% in year 1, then recovers at 2%/year. S&P 500 drops 38% in year 1, then returns 10%/year.
Property: ~€220,000 — the drop is painful, but rental income continues. No forced selling.
S&P 500: ~€290,000 — the market recovers faster than property and compounds strongly.
Winner: S&P 500 — liquidity and faster recovery give the index edge in crisis scenarios.
The Leverage Effect: Why It Changes Everything
The key insight is that property investing is not a comparison of €50k vs €50k. It is a comparison of €50k controlling €250k vs €50k controlling €50k.
This 5× leverage means:
- A 3% property appreciation = 15% return on your invested capital (before costs)
- A 10% S&P 500 return = 10% return on your invested capital
Leverage is the reason property can compete with — and often beat — a market that historically returns 10%/year.
What the Calculator Doesn't Capture
- Time cost of managing a rental property (maintenance, tenants, admin)
- Liquidity risk — you cannot sell 10% of a flat
- Concentration risk — one property in one city vs 500 companies
- Currency and country risk for international investors
- Mortgage refinancing opportunities (can reduce cost over time)
The Honest Conclusion
There is no universal winner. The result depends on:
| Factor | Favours Property | Favours S&P 500 |
|---|---|---|
| Property appreciation | High (>3%) | Low (<2%) |
| Rental yield | High (>5%) | Low (<4%) |
| Mortgage rate | Low (<3%) | High (>5%) |
| Tax on rental income | Low | High |
| Investor's time | Available | Scarce |
| Liquidity needs | Low | High |
The smartest investors don't choose one or the other — they use both. A leveraged property provides income and inflation protection; an S&P 500 index fund provides liquidity and diversification.
Try it yourself: Use the Leverage vs S&P 500 Calculator to model your specific scenario, or the FIRE Calculator to see how a mixed portfolio accelerates your path to financial independence.
The Mathematics of Leverage
€100,000 invested: S&P 500 at 10% = €10,000 year 1. Property 80% LTV (5% appreciation + 3% net yield) = €40,000 year 1 return on equity. Over 10 years: S&P 500 grows to €259,374; leveraged property equity grows to €645,902.
When Leverage Destroys Wealth
Ireland 2008-2012: 50-60% price falls meant 250-300% equity losses. Leverage only works if you can hold through downturns — requires cash reserves, stable rental income, fixed rates, and conservative LTV (70% or below).
Optimal Allocation by Life Stage
Age 25-35: 60-80% property (leveraged), 20-40% stocks. Age 35-50: 40-60% each, reducing leverage. Age 50-65: 20-40% property (minimal leverage), 60-80% stocks/bonds. Age 65+: property for income, stocks for liquidity.
Use our Leverage vs Stocks Calculator to model your specific scenario.