How to Rebalance Your ETF Portfolio: A 2026 Step-by-Step Guide

Rebalancing your ETF portfolio is essential for keeping your investments aligned with your risk tolerance and long-term goals. In this step-by-step guide, you’ll learn exactly how to rebalance an ETF portfolio as a European investor in 2026, using accessible platforms like DEGIRO and Trade Republic. We’ll cover frequency, thresholds, tax implications, tools, and common pitfalls, all illustrated with a practical EUR-based example.

Step 1: Review Your Target Allocation

What to do: Define or revisit your ideal asset allocation. For example, you might target 70% global equities and 30% eurozone bonds. Write down your target percentages for each ETF or asset class.

• Example: 70% iShares Core MSCI World UCITS ETF (EUNL), 30% Xtrackers II Eurozone Government Bond UCITS ETF (DBXZ)

Why it matters: Your allocation reflects your risk tolerance and investment horizon. Markets shift over time, causing your actual allocation to drift away from your target.

What can go wrong: If you skip this step, you may rebalance towards an outdated or unsuitable mix, increasing your risk or missing growth opportunities.

Step 2: Check Your Current Portfolio Allocation

What to do: Log into your broker and note the current value of each ETF. Calculate the percentage each holding represents of your total portfolio.

• In DEGIRO: Go to Portfolio → Positions to see market value per ETF.
• In Trade Republic: Tap Portfolio on the main screen to see each ETF’s value.

Example: Your portfolio is worth €10,000 — €7,800 in EUNL (78%) and €2,200 in DBXZ (22%).

Why it matters: This step reveals how far you’ve drifted from your target.

What can go wrong: Failing to use up-to-date values can lead to inaccurate calculations and unnecessary trades.

Step 3: Decide If Rebalancing Is Needed

What to do: Compare your current percentages to your targets. Set a threshold for action—commonly 5 percentage points or more.

• If your equity allocation target is 70% but is now 78%, and your bond allocation is 22% vs. a 30% target, you’ve crossed the 5% threshold.

Why it matters: Rebalancing too often can generate unnecessary costs and taxes; too rarely, and your risk profile may drift.

What can go wrong: Overreacting to minor fluctuations can erode returns through fees and taxes. Ignoring large drifts exposes you to unintended risks.

Step 4: Calculate the Trades Needed

What to do: Work out how much of each ETF to buy or sell to return to your target allocation.

• Total portfolio: €10,000
• Target for EUNL: 70% × €10,000 = €7,000
• Current EUNL: €7,800 (overweight by €800)
• Target for DBXZ: 30% × €10,000 = €3,000
• Current DBXZ: €2,200 (underweight by €800)

You need to sell €800 of EUNL and buy €800 of DBXZ.

Why it matters: Accurate calculations prevent overtrading and ensure you meet your goals with minimal cost.

What can go wrong: Rounding errors, forgetting cash or new deposits, or ignoring minimum trade sizes can throw off your results.

Step 5: Execute the Trades on Your Broker

What to do:

• In DEGIRO:
  1. Go to Portfolio → select EUNL → click Sell → enter the amount or number of shares to sell (e.g., €800 worth).
  2. Confirm the trade. Repeat for DBXZ, but use Buy and enter €800.
• In Trade Republic:
  1. Tap Portfolio → select EUNL → tap Sell → input the amount or shares → confirm.
  2. For DBXZ, tap Buy → enter €800 → confirm.

Expected outcome: After settlement (usually 1–2 days), your portfolio should reflect the new target allocation.

Why it matters: Executing trades efficiently minimises market risk and potential slippage.

What can go wrong: Market volatility can move prices between calculation and execution. Double-check order types (market vs. limit).

Step 6: Consider Tax Consequences

What to do: Check if selling ETFs will trigger capital gains tax in your country (e.g., Germany, France, the Netherlands).

• Keep records of purchase and sale prices (your broker provides statements).
• Be aware of annual exemptions (e.g., €1,000 in Germany as of 2026).

Why it matters: Taxes can erode your returns if not managed carefully.

What can go wrong: Selling appreciated ETFs without considering taxes could result in an unexpected bill. Each country’s rules differ—always check the latest regulations.

For more detail on minimising taxes, see How to Minimise ETF Fees and Taxes as a European Investor.

Step 7: Record and Review

What to do: Log every rebalance in a spreadsheet or portfolio tracker. Note the date, trades, and new allocation.

• Review your portfolio again in 6–12 months, or if markets are especially volatile.

Why it matters: Tracking your actions helps you avoid overtrading and keeps your strategy consistent.

What can go wrong: Failing to keep records can make tax reporting difficult and lead to emotional, inconsistent decisions.

Common Mistakes When Rebalancing an ETF Portfolio

• Rebalancing too often: This increases fees and potential taxes. Stick to your schedule or threshold.
• Ignoring transaction fees: Even low-cost brokers like DEGIRO and Trade Republic may charge for some trades. Check their fee schedule and pricing.
• Not considering tax effects: Selling winners can trigger capital gains. Always check your country’s rules.
• Using only percentages, not EUR values: Always calculate the exact euro amount for trades.
• Letting emotions drive decisions: Stick to your plan, not headlines or fear.
• Forgetting about new deposits or withdrawals: Factor in any cash flows since your last rebalance.

Next Steps

• Set a reminder to review your portfolio allocation every 6 or 12 months.
• Consider automating rebalancing via savings plans if your broker supports it (e.g., Trade Republic’s ETF Savings Plan).
• Read more about buying US stocks from Europe and monthly dividend ETFs to diversify your strategy.
• Stay updated on tax and fee changes in your country.

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.