How to Build a Multi-Asset Portfolio from Scratch

Decide what the money is for first

Your time horizon decides most of the allocation. Money you will spend in five years does not belong in the same split as money you will touch in thirty. If you need the portfolio to produce income, the split leans toward dividend stocks, savings and property; if you are still adding to it, it leans toward growth.

Risk tolerance is the honest limit on top of that. The 2022 market, where stocks and crypto fell 20% to 70% depending on the holding, was a usable stress test. If a 20% portfolio drop would make you sell everything at the bottom, the allocation needs to be more defensive than your age and time horizon suggest. The retirement calculator shows how different splits change the pot you finish with.

Choose the asset classes you actually understand

A multi-asset portfolio normally holds three to six classes, and each one does a different job:

Stocks are the growth engine. Broad index funds spread company risk across hundreds of businesses, and the dividend stream gives an income option.

Crypto offers high return potential with drawdowns that can exceed 70%. Since 2020 it has moved more in step with stocks than its early supporters claimed,  however, in 2026 in particular, it has decoupled from the stock market and tech stocks.

Savings give stability and liquidity. The cost is that cash usually loses to inflation over long periods, so it works as a reserve rather than a growth position.

Precious metals hedge inflation and currency moves. Gold carries no income, so its entire return is price appreciation, and physically held metal has premiums and storage costs on top.

Real estate produces rent and appreciation. Direct property needs capital and effort; a REIT gives property exposure with stock-like liquidity. Property returns are only meaningful on the equity you actually put in, not the property value.

Bonds sit outside the five classes most multi-asset trackers cover, and the split examples below keep to the five.

Set a split, and write it down

There is no correct split, but the shapes that recur are worth knowing. Each uses five classes:

• Growth: 50% stocks, 20% crypto, 15% real estate, 10% precious metals, 5% savings.
• Income: 40% dividend stocks, 25% real estate, 20% savings, 10% precious metals, 5% crypto.
• Balanced: 35% stocks, 10% crypto, 20% real estate, 15% precious metals, 20% savings.
• Preservation: 40% savings, 30% precious metals, 20% stocks, 10% crypto.

Again, this is not advice and you do you, as the above numbers are just typical setups to give you some idea, however, it all depends on personal circumstances and risk apetites.

Write the target down. Most investors skip this and end up holding whatever the market gives them, then cannot tell whether the drift is deliberate. The target is the benchmark you rebalance against.

If you have £10,000 to place at a 50/20/15/10/5 split, that is £5,000 to stocks, £2,000 to crypto, £1,500 to real estate, £1,000 to metals and £500 to savings. The sums only need to be in the right proportions, not exact to the pound.

For ongoing contributions, keep the same proportions and let regular deposits do the averaging. On £500 a month at the same split, that is £250 to stocks, £100 to crypto, £75 to real estate, £50 to metals and £25 to savings. Contributing on a fixed schedule removes the timing decision, which is most of the value: you stop asking whether now is a good moment and just buy.

Where each class lives, in the UK

Stocks belong in a Stocks and Shares ISA first: the subscription limit is £20,000 a year (2026/27), and gains inside it are free of income tax and capital gains tax. 

A SIPP is the pension version, with tax relief on the way in. 

Crypto goes on a registered exchange, savings in a high-interest account or cash ISA, metals with a dealer offering allocated storage, and property either directly or through a REIT bought inside the ISA.

The fourth decision: how you will know it is working

This is the one that decides whether the first three matter. Money spread across five platforms cannot be judged from any one of them. Your broker reports stock performance one way, your bank reports interest another way, and neither knows about the other.

A £5,000 stock holding that grows to £5,500 looks like a 10% return. If you also deposited £400 during that period, the gain on the £5,400 you actually invested is £100, closer to 1.9%. The deposit changes the denominator, and most platforms do not tell you which denominator they used. Returns are only comparable across stocks, savings, metals and property when every deposit, withdrawal and income payment is recorded the same way, which is what capital flow tracking means. The true returns explainer shows the same £5,000 built both ways.

When we rebuild a new user's history, the single most common surprise is that a reported return was calculated against the wrong denominator. The fix is usually a handful of forgotten deposits, and it changes the number by more than any fund choice would have.

Track the allocation as well as the value. A strong stock run can push equities from 50% to 60% of the pot within a year, which re-introduces exactly the concentration risk diversification was meant to remove. When a class drifts a few points from target, redirect new contributions toward whatever is light rather than selling, and the rebalancing guide covers when selling becomes necessary and what it costs in capital gains.