Most investors open a Stocks and Shares ISA for tax benefits, which is a great start. However, the real trick to generating long-term wealth lies in using the £20,000 annual contribution limit effectively.
Whether you’re a growth or income investor, it’s critical to ensure adequate diversification in an ISA. Only focusing on one area fails to appreciate how different stocks complement each other.
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So what’s the best way to plan an ISA portfolio?
The two-part ISA approach
A popular approach to balancing an ISA is to split it into two parts:
- Core holdings: reliable dividend payers, diversified funds, or investment trusts.
- Satellite holdings: a smaller allocation to faster-growing shares or sectors.
This gives the portfolio a balance between stability and upside. It also helps avoid the common mistake of building an ISA that is either too cautious or too speculative.
A few example stocks
Core holdings are ideally large-cap blue-chip companies that are well-established. Because of their bloated size, they tend to grow slower but are less volatile and usually offer stable income.
Some of my favourite FTSE 100 core holdings include AstraZeneca, Unilever, HSBC, and National Grid.
Picking satellite holdings requires more care, as they’re typically riskier — but with higher reward potential. One that’s been rapidly rising up the ranks on my watchlist is Applied Nutrition (LSE: APN).
A key reason I like this FTSE 250 company is because I use its products, so I understand it well. That’s always a good place to start when choosing companies to invest in.
What I like about Applied Nutrition
While many larger UK companies have been stagnant this year, Applied Nutrition is up 133.4% since June 2025.
After a run like that, you’d expect analysts to be wary of further growth. But the majority of analysts still rate it a Buy, with an average 12-month price target of 322p. That’s 10% higher than today’s price.
The company just acquired US-based Nutrablend Group for $16m, a move that sent the price soaring 16% in early June. The deal is expected to deliver at least $30m in revenue by 2027.
So has most of the growth been priced in already? I don’t think so. Valuation is critical when hunting growth stocks, and while Applied’s is high, it’s still affordable considering the recent rally.
But the risks are still important to address. Acquisitions are pricey and if they don’t pan out as hoped, the financial impact can be significant. Plus, the company’s now more exposed to the US market, so any downturn there would hurt profits.
Still, with revenue growing rapidly and recent guidance upgraded, I think it’s a top stock to consider as a small part of a diversified portfolio.
Common mistakes to avoid in an ISA
When picking stocks for your balanced ISA portfolio, don’t fall foul to these errors:
- Chasing the highest yield without checking if it’s sustainable.
- Overly concentrating in one sector.
- Ignoring the risk of dividends being cut.
- Treating the ISA like a trading account rather than a long-term plan.
The bottom line
The best ISA strategy is often the simplest one. Build a core of quality holdings, add a little growth, and let tax-free compounding do the work.
For many investors, that’s a more realistic path to passive income than trying to pick the next big winner.
Should you invest £5,000 in Applied Nutrition Plc right now?
When investing expert Mark Rogers and his team have a stock tip, it can pay to listen. After all, the flagship Twelfth Magpie Share Advisor newsletter he has run for nearly a decade has provided thousands of paying members with top stock recommendations from the UK and US markets.
And right now, Mark thinks there are 6 standout stocks that investors should consider buying. Want to see if Applied Nutrition Plc made the list?
Mark Hartley owns shares in AstraZeneca, Unilever, HSBC, and National Grid.
