Building a six-figure retirement portfolio from scratch feels like a daunting task, but it becomes much more manageable when broken down into clear math. If you are aiming for a £300,000 SIPP balance in 15 years, achieving a 5% compound annual growth rate requires a monthly contribution of £1,133.
The real benefit of using a SIPP lies in tax relief. Because of how the system works, an investor does not need to pay that full £1,133 out of their own pocket. For a basic rate taxpayer, a monthly contribution of just over £906 is enough to reach that £1,133 target once tax relief is added. The numbers become even more favorable for higher or additional rate taxpayers.
Of course, reaching these goals requires a disciplined approach to asset selection. Investors should look for stable, blue-chip companies that offer consistent growth potential. Diversification is necessary to protect capital, as dividends are never guaranteed and market conditions change over time.
One company worth considering for a long-term portfolio is Reckitt Benckiser. With a 4.1% yield and strong pricing power through household brands like Finish, it represents the type of resilient business that can anchor a retirement strategy. While the stock has faced headwinds in recent years, its current valuation at 11 times earnings makes it a point of interest for long-term holders.
Planning for retirement is about consistency and taking advantage of the tax benefits available. By setting clear targets and choosing the right instruments, building wealth over a 15-year horizon is a practical objective for many workers.

