Before You Start
- Basic understanding of ETF investing (asset classes, risk tolerance, portfolio allocation)
- Active accounts with at least one European broker (e.g., Trade Republic, DEGIRO)
- Access to your ETF portfolio dashboard and transaction history
- Spreadsheet or portfolio tracking app (optional but helpful)
Time needed: 30–60 minutes per rebalance session
What you'll need: Smartphone/computer, broker login, calculator or spreadsheet
Rebalancing is the secret sauce for keeping your ETF portfolio healthy and aligned with your goals. Whether you’re following a lazy portfolio or a more hands-on approach, knowing how (and when) to rebalance ensures you’re not taking on too much risk—or missing out on growth.
Why Rebalancing Your ETF Portfolio Matters
When you first set your target allocation (say, 70% global equities, 30% eurozone bonds), you pick a risk level that matches your goals. But over time, markets move. If stocks soar, your 70% could creep up to 80%—meaning you’re now riskier than intended. Rebalancing brings your portfolio back to your chosen mix.
- Reduces risk: Keeps your exposure in check, especially after big market swings
- Disciplined investing: Forces you to "sell high, buy low" by trimming winners and topping up laggards
- Simplifies decisions: No guesswork—just stick to your plan
Risks of Not Rebalancing
- Drifted allocation: Your portfolio might become too aggressive (or too conservative) for your risk profile
- Missed targets: You may not achieve the long-term returns you expect
- Emotional investing: Without a system, you’re more likely to buy high and sell low
Common Rebalancing Methods for European Investors
There’s no one-size-fits-all approach, but these three methods work well with European brokers and ETFs:
- Calendar-based: Rebalance at regular intervals (e.g., every 6 or 12 months)
- Threshold-based: Rebalance only when an asset class drifts by a set percentage (e.g., 5%) from its target
- Hybrid: Check at set intervals, but only act if thresholds are breached
Let’s break down exactly how to execute a professional, cost-efficient rebalance—step by step.
Step 1: Review Your Target Allocation
What to do: Confirm your ideal mix of asset classes. For example:
- 60% MSCI World ETF (e.g., iShares Core MSCI World UCITS ETF, ISIN: IE00B4L5Y983)
- 20% MSCI Emerging Markets ETF (e.g., Xtrackers MSCI Emerging Markets UCITS ETF, ISIN: IE00BTJRMP35)
- 20% Eurozone Government Bond ETF (e.g., iShares Core € Govt Bond UCITS ETF, ISIN: IE00B4WXJJ64)
Why it matters: Your targets are your compass. If your goals or risk tolerance have changed, update these numbers before rebalancing.
What can go wrong: Using outdated targets can lead you to rebalance in the wrong direction, increasing risk or missing opportunities.
Pro Tip
Write your allocation targets in a spreadsheet and keep them visible in your portfolio dashboard to avoid confusion during future rebalances.
Step 2: Calculate Your Current Allocation
What to do: Find the current value of each ETF in your portfolio. Add up all ETF values to get the total, then calculate each ETF’s percentage.
- Example: Your portfolio is worth €10,000.
- MSCI World ETF: €6,800
- Emerging Markets ETF: €1,300
- Bonds ETF: €1,900
Calculation:
- MSCI World: (€6,800/€10,000) × 100 = 68%
- Emerging Markets: (€1,300/€10,000) × 100 = 13%
- Bonds: (€1,900/€10,000) × 100 = 19%
Why it matters: This shows exactly how far you’ve drifted from your targets.
What can go wrong: Forgetting to include cash balances or new deposits can skew your percentages.
Pro Tip
Many brokers, like DEGIRO, show the value of each holding on your portfolio page. You can also use free tools like Portfolio Performance or MyStocks to automate tracking.
Step 3: Choose Your Rebalancing Method
What to do: Decide if you’ll rebalance by calendar (e.g., every January), threshold (e.g., if any asset drifts by 5%+), or hybrid (e.g., check quarterly, rebalance if drift >5%).
Why it matters: The method affects how often you trade—and how much you pay in fees and taxes.
- Calendar: Simple, predictable. Good for hands-off investors.
- Threshold: More responsive, but may trigger trades after big swings.
- Hybrid: Best of both: check regularly, but only act if needed.
What can go wrong: Over-frequent rebalancing can rack up unnecessary costs. Too infrequent, and your portfolio drifts too far.
Step 4: Minimize Costs and Taxes
What to do: Before trading, check your broker’s fees and consider tax implications. For example:
- Trade Republic: €1 flat fee per trade (as of 2026)
- DEGIRO: €2–€3 per ETF trade, some ETFs commission-free on the Free ETF list
Plan to use new contributions (“cash flows”) to rebalance when possible, avoiding unnecessary sales.
Why it matters: Every fee and tax eats into your returns. Using cash to rebalance is the most efficient method.
What can go wrong: Selling ETFs may trigger capital gains tax. Small, frequent trades can add up in fees.
Pro Tip
If you use DEGIRO, check if your ETF is on the Free ETF list—you may be able to rebalance at zero cost once per month.
Step 5: Place Your Rebalancing Trades
What to do: Use your broker’s app or website to buy or sell ETFs to return to your target allocation. Here’s how it looks on two major platforms:
- Trade Republic:
- Open the app, tap Portfolio
- Tap each ETF, then Buy or Sell as needed
- Enter amount in EUR (e.g., buy €700 of Emerging Markets ETF, sell €800 of MSCI World ETF)
- Review the summary, confirm the trade
- You should now see updated ETF values and allocation percentages
- DEGIRO:
- Log in at degiro.ie
- Select Portfolio, then the ETF you want to adjust
- Click Buy or Sell, enter the amount in EUR
- Check order details, confirm the transaction
- Portfolio overview will update with new balances
Why it matters: Executing accurately ensures you hit your targets and avoid accidental over-trading.
What can go wrong: Mis-entering trade amounts, trading outside market hours, or forgetting to account for transaction fees.
Pro Tip
Double-check minimum trade sizes (e.g., some brokers have €10 minimum per ETF) and be mindful of fractional shares, especially if investing small amounts.
Step 6: Automate Where Possible
What to do: Set up automatic savings plans to reduce manual effort. Both Trade Republic and DEGIRO offer recurring ETF purchases.
- Trade Republic: Go to Portfolio → Savings Plan → Select ETF, set amount and frequency
- DEGIRO: Use the AutoInvest feature to schedule regular ETF buys
Adjust your savings plan periodically to steer new contributions toward underweight assets—this is called “cash flow rebalancing.”
Why it matters: Automation keeps your portfolio close to target with less effort and emotion.
What can go wrong: If you never review your plan, allocation drift may still occur over time. Schedule a check-in at least once a year.
Pro Tip
Combine automation with a calendar-based review (e.g., every January) to catch and correct any persistent drifts.
Common Mistakes When Rebalancing ETF Portfolios in Europe
- Rebalancing too often: Leads to unnecessary fees and taxes
- Ignoring fees: Small costs add up—use commission-free options when possible
- Forgetting about taxes: Selling ETFs may create taxable gains; check your country’s rules
- Letting emotions drive trades: Stick to your method, not market headlines
- Not updating targets: Review your allocation if your life situation or goals change
Next Steps
- Set a calendar reminder for your next rebalance check
- Track your allocation and trades using a spreadsheet or app
- Read more about building a 3-fund ETF portfolio in Europe for hands-off investing
- If you’re new to global ETFs, see our guide on investing in the MSCI World Index from Europe
Disclaimer: This article is for educational purposes only and does not constitute financial advice. Always do your own research and consider consulting a qualified financial advisor before making investment decisions.