Aviva (LSE:AV.) shares have quietly become one of the most attractive income opportunities in the entire FTSE 100. With UK insurance stocks offering some of the most generous dividends on the market right now, investors are increasingly paying attention. And it isn’t hard to understand why.

At today’s dividend per share of 39.3p, Aviva shares offer a chunky yield of 6.34%. And subsequently, investors need just 3,053 shares to unlock a £1,200 annual passive income – equivalent to a tidy £100 a month.

Of course, at its current share price of around 620p, acquiring that many shares would cost £18,928.60. That’s obviously quite a chunky sum for most investors. But by drip feeding money in each month using a Stocks and Shares ISA, it’s an entirely achievable threshold to reach over time.

But the real question is: is buying Aviva shares in 2026 actually even a good idea?

What’s making Aviva so attractive right now?

The bull case for Aviva is genuinely compelling, and it goes well beyond the headline yield.

Under CEO Amanda Blanc, the business has been transformed. Aviva has shed a string of underperforming international businesses, redeployed capital into higher-return UK and Irish operations, and built a powerful multi-line platform spanning insurance, wealth, and retirement.

That diversification is proving its worth. Each division feeds the others, creating a flywheel of recurring cash flows that deepens customer relationships and nurtures stronger recurring cash flows to support the dividend.

The recent acquisition of Direct Line has only compounded this strategy, adding meaningful scale to its general insurance arm. And while the integration is still ongoing, cost synergies are already starting to materialise.

Meanwhile, the UK bulk annuity market (where Aviva’s a major player) continues to grow rapidly as defined benefit pension schemes seek to capitalise on the higher interest rate environment and offload their risk to insurance groups.

This pension risk transfer tailwind is enormous. And in my opinion, Aviva’s exceptionally well-positioned to capture it.

Are there any risks worth watching?

As with any investment, there are always risks to consider. And Aviva’s no exception. Integrating Direct Line is so far proving relatively smooth, but merging a large, complex insurance business is an exceptionally tricky task prone to delays and budget overruns.

As a result, Aviva’s margins could come under material pressure if unforeseen operational disruptions come knocking. And even after integration is complete, there’s still the fiercely competitive UK motor and home insurance market for the company to navigate.

There’s also the broader macroeconomic landscape to consider. A sharper-than-expected economic slowdown could drive up claims across the general insurance book, while a prolonged fall in long-term interest rates would reduce returns on Aviva’s investment portfolio and put pressure on the lucrative annuity business.

So where does all this leave investors today?

Is the income opportunity worth pursuing?

For patient income investors, I think Aviva shares represent an interesting, well-rounded FTSE 100 opportunity. The yield’s generous, the business model’s increasingly robust, and the dividend has real structural support behind it.

Economic uncertainty in 2026 is definitely a risk not to be taken lightly. But for investors seeking exposure to the UK insurance market, Aviva could be a good place to start investigating further.

Should you invest £5,000 in Aviva 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 Aviva Plc made the list?

Zaven Boyrazian has no position in any of the shares mentioned.