Most investors think that using multiple brokers means they are diversified. Usually, it just means the same stocks are scattered in different places. That was exactly what my portfolio looked like for years, so I rebuilt the whole thing from scratch. Today I want to walk you through my new 4-broker setup and why each of them has a specific job.
The Problem: Multiple Brokers Is Not Diversification
If you have been investing for a few years, you have probably opened a few different broker accounts along the way. Maybe one for long term ETFs, another one a friend recommended, a third because you tried copy trading. Before the rebuild, I had my S&P 500 ETF sitting in both Interactive Brokers and Trading 212, Amazon and Google across both eToro and Trading 212, and cash in three different currencies spread across all of them.
My portfolio looked less like an investment strategy and more like a supermarket trolley. Whenever something was on sale, I put it into the basket without a real plan or list. Someone actually asked me once why I was holding Amazon in so many different places. I did not have a good answer. It just happened slowly over time as I kept testing different platforms and never went back to consolidate.
The real problem was not the duplication itself, it was that I had no way to measure what was actually working. If your long term ETFs are spread across two brokers and your individual stocks sit across two more, you cannot honestly answer the question: which strategy is outperforming? The numbers blend together and hide the truth.
My New Framework: One Job Per Broker
The rebuild rule is simple. Each broker gets one specific job, one clear purpose, no overlap. Here is the setup I landed on, and what each broker is responsible for.
If you prefer the full video walkthrough of this setup, with screen shares inside each broker app and the reasoning behind every choice, you can watch it below.
Do You Actually Need 4 Brokers?
Honestly, no. For most people, one is absolutely plenty. Before dismissing any of the sections below, let me be clear about who each tier is actually for, because this is the section I wish someone had shown me when I was just starting out.
Forget all of this for now. Pick one broker, build the habit of investing, and add more brokers later only when each new one has a clear job to do. Complexity without purpose is just friction.
Broker 1: Interactive Brokers, the ETF Vault
Interactive Brokers is the workhorse of my setup. The app is not the most exciting or beautifully designed, but I would rather have a slightly clunky platform with low fees than a beautiful one that quietly eats my returns. When you care about keeping costs down over 20 or 30 years of compounding, this is the broker I trust with the bulk of my money.
Here is the thing about ETF costs that most beginners miss. Commission is just one part of the story. A lot of brokers advertise zero commission, which sounds great, but then the spread on the ETF is wider or the FX conversion fee takes a bigger chunk every time you buy. The real number that matters is the total cost of ownership: commission plus spread plus FX fee. On top of that, IBKR is a publicly listed company with one of the longest track records in the industry, which matters for trust. You want a broker that will still be around decades from now.
If you are interested in setting up a joint or second account, I wrote about the exact process in how to open a second Interactive Brokers account, which is what I did to split my own portfolio from my son's.
Broker 2: eToro, the Public Copy Portfolio
If Interactive Brokers is the workhorse, eToro is the social one. It is easy to use, the platform is fun, and the copy trading concept is a legitimately useful idea. Anyone can follow another investor on eToro and automatically copy their trades. When they buy, you buy. When they sell, you sell.
I have my own copy portfolio on eToro. That means whenever I buy or sell on eToro, my copy traders mirror it. Which is exactly why my eToro portfolio has to be the responsible one: no wild bets, no speculative nonsense, balanced, mostly US tech quality, the kind of portfolio I am comfortable showing anyone.
There is also a club tier system. The higher you go, up to Diamond, the more perks you unlock, including things like access to Formula One races where they sponsor the Alpine team.
If you want to mirror my trades automatically, my eToro copy portfolio is available here. You see every position transparently and any trade I open or close on eToro is reflected in your account.
Broker 3: Trading 212, the Strategy Lab
Trading 212 is where things get fun. It is commission-free on stocks and ETFs, offers fractional shares from as little as one euro or pound, and has a feature called pies. A pie is basically a mini portfolio inside your main account. You pick the theme, you pick the stocks, you pick the target weights, and you can track the basket performance completely separately from everything else.
This is perfect for experimenting. Want to test a dividend portfolio? Build a pie. Want to test an AI strategy? Build another one. Each pie has its own performance chart against the S&P 500, so you actually find out whether your theme is beating the market or not. No more blending experiments into your core portfolio and kidding yourself about the returns.
I am planning to document a few specific pies in future videos: different themes, different strategies, each one tracked over time. I am not going all in on any of them, but I want to share the process. For a step by step walkthrough of the platform itself, see my Trading 212 investing guide. If you are opening a new account, you can also grab my current Trading 212 promo code for a free fractional share.
Broker 4: Lightyear, the European Account
If I had to describe Lightyear in one sentence, I would say it is the cleanest, nicest looking investment app I have ever used. Every time I open it, it just feels nice. That sounds like a small thing, but when you check an app regularly, design matters.
The real reason Lightyear is back in my setup, though, is currency. I keep my Lightyear account Euro native. I deposit euros, I invest in euros, and I do not pay any FX fees when I buy European stocks. On most other brokers, if you deposit dollars or another currency and you want to buy a German stock, you pay an FX fee to convert to euros first, and another one when you sell and convert back. Over years, that adds up more than people realise.
With Lightyear I can buy ASML, SAP, LVMH and other popular European names, and the transaction is just clean euros to clean euros. No conversions. It also gives me real currency diversification. Most of my portfolio sits in US dollars across the other three brokers, so having a chunk in euros is genuine geographic and currency diversification, not fake diversification from duplicating the same US stocks in different accounts.
If you want the full rundown including the current signup offer, see my Lightyear promo code article for the step by step on claiming the free fractional share.
Why Splitting Brokers Actually Works
Once you have one broker per job, the benefits compound. Here are the four reasons this framework holds up in practice.
The Trade-offs Worth Knowing
This framework is not free. A multi broker setup adds real overhead that beginners underestimate. Here is the honest balance sheet.
- Real broker and currency diversification, not duplication
- Clean performance tracking per strategy
- Right tool per job, not compromising on fees
- Access to specific features like Pies, copy trading, Euro native stocks
- Broker risk spread across independent companies
- More admin: tax reports, statements, logins
- Four KYC processes and deposit flows to set up
- Risk of overlap if you do not enforce the one job rule
- Portfolio tracking becomes harder without a dedicated tool
- Zero benefit unless each broker has a clear purpose
For the tracking problem specifically, I built a free tool on my website that shows every position across all my brokers in one place. That was the final piece that made the multi broker setup actually workable for me rather than a monthly headache.
How to Build Your Own Multi Broker Setup
If you have read this far and you are convinced the framework suits you, here is the order I would follow. Do not skip steps. The people who end up with messy overlap are the ones who open the second broker before defining what it is for.
Start by writing down each broker's job on paper. Vault, lab, public, European, high interest savings, whatever the split looks like for you. Then open them one at a time, fund each one, and actively resist the temptation to buy the same stock on two different accounts. If you already have duplication, consolidate over the next few weeks. Transfer positions where possible, or sell and rebuy if the tax impact is minor. Finally, set up a single dashboard that shows everything in one view, so your brain does not need to do the aggregation.
The single biggest mistake with a multi broker setup is opening a new account without deciding what it is actually for. If you cannot describe the new broker's specific job in one sentence, you are about to create exactly the duplication problem you are trying to solve.
Should You Copy This Setup?
Probably not. Four brokers is for very specific situations. I use this setup because I test brokers for a living, I run a public copy portfolio, I want themed experiments separate from my core, and I want Euro native access for European stocks. Your life likely looks different.
The transferable idea is not the specific four brokers, it is the framework. Every broker in your life should have one job. If you cannot write down that job in a sentence, either close the account or consolidate. Most people would get 80 percent of the benefit with two brokers: one vault, one lab. Everything beyond that is optimisation for specific needs.
Frequently Asked Questions
Only if each broker has a specific job. Using two or more brokers for the same purpose just duplicates your holdings across accounts without adding real diversification. One broker is enough for most beginners. Multiple brokers become useful when you want to separate strategies, access different currencies, or spread broker risk.
For most people, one is plenty. Two makes sense when you want to split long term ETFs from individual stock picks. Three is for spreading broker risk or testing a different strategy. Four is only worth it for specific cases like currency diversification or geographic focus.
Not by itself. Holding the same stocks and ETFs across three different brokers is duplication, not diversification. Real diversification comes from the underlying assets, currencies, and geographies you invest in. The broker is just the container.
For my setup, Interactive Brokers is the ETF vault. The total cost of ownership, commission plus spread plus FX fee, is the lowest of the brokers I use. For smaller accounts or beginners, Trading 212 is a solid alternative with commission-free ETFs and fractional shares.
Most brokers are USD based. If you want to buy European stocks like ASML, SAP or LVMH without paying FX fees on every trade, a Euro native broker like Lightyear avoids that drag. It also gives you real currency diversification if the dollar weakens relative to the euro.
Probably not. For most people, one broker is enough. This setup fits me because I test brokers for a living and want to separate ETFs, copy trading, themed experiments and European stocks. Start with one, build the investing habit, and add more brokers only when each one has a clear job.
Disclaimer: This article is for educational purposes only and does not constitute financial advice. When investing, your capital is at risk. You may get back less than you invested. Past performance is not a guarantee of future results. This article contains affiliate links, meaning I may earn a small commission if you sign up through them, at no additional cost to you.
