How many 6%-7% yielding FTSE 100 dividend shares do you need to target £100 a month in passive income? 

FTSE 100 dividend shares remain a simple way to build passive income, but the maths is what really matters.

To reach £100 a month, an investor would want to generate £1,200 a year. That means choosing shares with a sensible yield and a dividend record that can be trusted.

The income target

If we assume an average yield of 5% to 6%, the capital needed is roughly £24,000 to £20,000. It’s the same logic that any investor could apply to a savings account: the higher the income rate, the less money needed upfront.

So how many shares does that equate to? That really depends on what we invest in. As of today, the average share price on the FTSE 100 sits around £25. That works out to around 800-960 shares. But the number of shares held in a portfolio means very little.

The trick is choosing companies with a reliable dividend policy. A yield moves up and down with the share price, so I always check the latest figures.

Here is a quick guide to what the market is offering today.

10 high-yielding FTSE 100 dividend stocks

Why LondonMetric stands out

LondonMetric is a real estate investment trust (REIT) focused on commercial property that offers tax benefits that support dividends.

Please note that tax treatment depends on the individual circumstances of each client and may be subject to change in future. The content in this article is provided for information purposes only. It is not intended to be, neither does it constitute, any form of tax advice.

Its latest annual results showed a £7.6bn portfolio, described by the business as efficient and income-focused. The company also said net rental income rose 16.6% to £455.3m, while the dividend for the year increased 3.8% to 12.45p.

What I like here is the mix of income and discipline. The shares screen as a high-yield REIT, and the business says it has a logistics weighting of 53%, which helps explain why it is not just an office play. It recently enjoyed its 11th consecutive year of dividend growth, with the yield now hovering around 6.7%

But the risk is clear too. Higher interest rates tend to result in lower demand for commercial property, as financing becomes more difficult. So, while this isn’t some magical risk-free cash machine, it’s showing promise in the current environment.

Could it be one of the better FTSE 100-style income ideas for 2026? Yes, if the economy continues to strengthen. But still, to reduce risk, investors should only consider it as part of a diversified portfolio.

The bottom line

For British investors chasing passive income, it’s difficult to say the exact number of FTSE 100 shares needed. But as we can see, even just aiming for a moderate £100 a month requires a meaningful upfront investment — and a careful eye on yield quality.

Higher yields can help you reach the target faster, yet they also deserve closer checks on balance sheets, payout cover, and business risks.

I would rather own a durable dividend payer with steady growth than chase the biggest headline yield. And that’s why LondonMetric stands out today.

Should you invest £5,000 in LondonMetric Property Plc right now?

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Mark Hartley owns shares in Legal & General, Aviva, Reckitt Benckiser.