Before You Start
- All account holders must be at least 18 years old and legally resident in an EEA country where your chosen broker operates.
- Each participant must have a valid EU/EEA ID (passport or national ID) and proof of address (utility bill, bank statement, or government letter).
- You’ll need a basic understanding of investment products (ETFs, stocks, funds) and tax implications in your country of residence.
- All parties should agree in writing on how the account will be managed and what happens in case of death or dispute.
Time needed: 45–90 minutes for online setup; up to 2 weeks for full verification and account funding.
What you'll need: Personal identification, tax identification numbers, proof of address for each account holder, internet access, and a compatible device.
Opening a joint investment account in Europe can streamline wealth building for couples, families, and business partners. But it also introduces legal, tax, and operational complexities that solo investors never face. This guide walks you through every step—eligibility, KYC, tax treatment, survivorship rights, and choosing the best brokers (like Trade Republic and DEGIRO). We highlight what can go wrong, so you protect your money and relationships.
As we covered in our complete 2026 guide to money management for European investors, joint accounts are a powerful tool—but only if set up correctly. Here, we go deep on the practical and legal details you need to know.
Step 1: Decide Who Should (and Shouldn’t) Open a Joint Investment Account
What to do: Clarify with your potential co-investors (partner, spouse, family member, or business associate) why you want a joint account. Discuss your investment goals, risk tolerance, and what happens if someone wants to withdraw funds or passes away.
- Couples: Joint accounts are common for long-term partners married or cohabiting. They simplify wealth management, but can complicate things if you break up.
- Families: Parents and adult children sometimes invest together for estate planning, but this can create tax and legal issues if not clearly documented.
- Business Partners: Joint accounts can be efficient for shared investments, but disagreements or dissolution can lead to costly disputes.
Why it matters: Joint accounts give all parties equal legal rights to the assets, regardless of who contributed the money. This can be a blessing or a curse. For example, if one party racks up debts, creditors may be able to claim joint assets.
What can go wrong: Disputes over withdrawals, divorce, or death can freeze funds or trigger legal proceedings. Some brokers only allow joint accounts for couples, not business partners or families—check eligibility before proceeding.
Pro Tip
Put your joint account agreement in writing before opening the account. Specify who manages investments, how profits/losses are split, and what happens if someone dies or wants to exit.
Step 2: Choose a European Broker That Supports Joint Accounts
What to do: Pick a reputable, EU-regulated broker that allows joint accounts for your situation. In Europe, the main options are:
- Trade Republic (Germany-based; works in most eurozone countries): Official joint account info
- DEGIRO (Netherlands-based; pan-European coverage): Joint account FAQ
| Broker | Supports Joint Accounts? | Min. Deposit | EUR Fees (2026) | Notes |
|---|---|---|---|---|
| Trade Republic | Yes (for couples, some countries) | €0 | €1/trade or free savings plans | Simple mobile setup, limited to 2 holders |
| DEGIRO | Yes (for family/couples/business partners) | €0 | €2–4/trade, free ETF core selection | Web-based, more flexible, up to 3 holders |
Why it matters: Not all brokers offer joint accounts, and some restrict who can open them. Trade Republic is easy for couples but not for business partners. DEGIRO is more flexible but has slightly higher trading fees.
What can go wrong: If you choose a broker that doesn’t support your joint structure, your application will be rejected, or you may be forced to transfer assets later (triggering taxes or fees).
Step 3: Gather KYC Documents and Complete the Application
What to do: Collect for each account holder:
- Valid EU/EEA passport or national ID
- Proof of address (utility bill, bank statement, or government letter, dated within last 3 months)
- Tax identification number (TIN) from your country of residence
Then, start the application:
- Trade Republic: Open the app, tap "Profile" → "Open Joint Account," and follow prompts to invite your co-applicant. Both must complete video verification and upload documents.
- DEGIRO: Register online, select "Joint Account," and enter details for all applicants. Each person receives a verification email and must upload ID and proof of address. Some countries require a postal verification code.
Why it matters: EU anti-money laundering rules require brokers to verify all account holders' identities and tax status (KYC/AML). Incomplete or mismatched documents are the #1 cause of rejected applications.
What can go wrong: If any document is blurry, expired, or mismatched (e.g., address doesn’t match registration), your application will be delayed or denied. If one party fails video verification, you’ll need to start over.
Pro Tip
Scan or photograph all documents in advance and save them to a secure folder. If using Trade Republic, ensure both parties are present for the video call—missed calls can delay account opening by days.
Step 4: Understand Tax and Legal Implications (Before Funding the Account)
What to do: Research how joint accounts are treated under your country's tax laws and inheritance rules. Key points:
- Taxation: In most EU countries, joint accounts are taxed based on each holder’s share of contributions. If you invest €6,000 and your partner invests €4,000, returns should be split 60/40 in both reporting and tax filings.
- Gift tax: If one party contributes significantly more, local authorities may interpret this as a taxable gift, especially for non-spouses or business partners.
- Survivorship rights: In some countries (e.g., Germany, Netherlands), a joint account may automatically pass to the surviving holder. In others (e.g., France, Spain), inheritance laws may override this and freeze assets until probate.
Why it matters: Failing to report income or incorrectly allocating ownership can trigger audits and fines. Survivorship misunderstandings can leave assets inaccessible for months after a death.
What can go wrong: If you don’t clarify ownership and reporting, you could face double taxation or legal disputes with heirs or ex-partners. Always inform your tax advisor of joint holdings.
Pro Tip
Keep a log of all deposits and withdrawals by each holder. Use a shared Google Sheet or finance app to track who owns what—this is crucial for tax filings and resolving disputes.
Step 5: Fund Your Account and Make Your First Joint Investment
What to do: Once your joint account is approved (typically 2–5 business days after verification), transfer EUR funds from a bank account held jointly or by one of the account holders. Then, place your first investment order:
- Trade Republic: In the app, tap "Portfolio" → "Savings Plan" → "Select ETF" (e.g., iShares Core MSCI World UCITS ETF, ISIN: IE00B4L5Y983). Enter monthly amount (e.g., €200), confirm both account holders, and set up the plan. You should see the scheduled purchase in your dashboard with the next execution date.
- DEGIRO: On the web platform, click "Deposit/Withdraw" to fund the account, then search for your chosen ETF (e.g., Vanguard FTSE All-World UCITS ETF, ISIN: IE00B3RBWM25). Enter order type and amount (e.g., buy €1,000), confirm for both holders, and submit. Trade confirmation appears in "Transactions."
Why it matters: Joint accounts require both parties to approve large transactions and withdrawals. This protects against unauthorized trades, but can slow down urgent actions.
What can go wrong: If your bank transfer comes from a non-registered account, brokers may reject the deposit. Always use a bank account in the name of at least one joint holder.
Pro Tip
Set up a joint EUR savings plan to automate regular contributions. For detailed setup, see our guide on zero-fee EUR savings plans for European investors.
Step 6: Set Rules for Account Management and Exit Scenarios
What to do: Agree on—and document—how you’ll manage the account, including:
- How investment decisions are made (unanimous or majority rule)
- Rules for withdrawals or closing the account
- What happens in case of separation, death, or incapacity
Why it matters: Most European brokers require signatures from all holders for major changes. Without clear rules, disputes can freeze your assets or lead to costly legal battles.
What can go wrong: If one party becomes unreachable or incapacitated, you may lose access to your investments until a court intervenes. This is especially risky for business partners or non-married couples.
Pro Tip
Ask your broker about adding a "power of attorney" or "mandate" for trusted third parties. This can ensure continuity if something happens to one of you.
Common Mistakes When Opening a Joint Investment Account in Europe
- Assuming all brokers allow joint accounts—always check eligibility first.
- Not aligning on investment goals, risk, or exit plans with your co-investors.
- Using incomplete or mismatched KYC documents, causing delays or rejections.
- Ignoring tax implications—especially gift tax and reporting requirements.
- Failing to document who contributed what, which can lead to legal disputes or tax audits.
- Not updating account mandates after life changes (marriage, divorce, death).
Next Steps
- If you’re new to joint investing, revisit your broader financial plan—see our complete 2026 guide to money management for European investors.
- Set clear financial goals together. For practical strategies, read how to set financial goals as a European investor.
- Consider automating your joint savings and investments. Our guide on automating EUR savings and investing can help.
- Review your account annually and update mandates or agreements as your lives and laws change.
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.