NatWest Drops 5%: Is a New Tax Coming?

if you woke up on August 29, 2025, and saw your NatWest shares down nearly 5%, you weren't alone in feeling a bit of a sting. I’m telling you, it was a proper bloodbath for UK lenders. A billion pounds in market value just... poof. gone in a single morning. But here is the thing—it wasn't some massive financial crash or a bank failure. It was something much more predictable but equally terrifying for investors: the "t-word," tax.

​Specifically, we are talking about a windfall tax. A think tank called the IPPR dropped a report suggesting the government should claw back some of those record-breaking bank profits to fix the country's finances. The thing is, Lloyds and Barclays have been raking in over £45 billion, and the government is looking at that pile of cash with very hungry eyes. Let's get into the raw details of why the market is panicking and what you should actually do with your shares before the November budget.

​the friday freak-out: why natwest led the fall

​Let’s get into it—why was NatWest the first to trip? To be fair, they’ve had a great run in 2025, up about 10% before this happened. But when the IPPR report "fixing the leak" hit the news, investors ran for the exits. natwest shares dropped to around 511p, wiping out roughly £2.5 billion in value. Lloyds and Barclays followed suit, losing 2-3% each.

​I’m telling you, the market is a bit like a nervous schoolkid right now. With the big budget coming up on November 26, any mention of a new tax sends everyone into a frenzy. The government needs to plug a massive hole in the public finances, and the big banks—who are making money hand over fist—are the easiest targets in the world. It’s a classic case of politics meeting profit, and usually, profit is the one that gets bruised.

​What exactly is this "windfall" anyway?

​The thing is, most people hear "windfall tax" and think it’s just a penalty for being successful. But I’m telling you, the argument here is a bit more technical. It’s all about quantitative easing (QE). Back in the day, the Bank of England "printed" billions to save the economy. Now, because interest rates are high (around 4%), banks are earning massive interest on the reserves they keep at the Bank of England.

​The IPPR is basically saying, "Look, the taxpayers are paying the banks £22 billion a year in interest, while the banks aren't really doing anything extra for it." They want a tax on that specific profit. To be fair, it could raise up to £8 billion a year for schools and hospitals. But for an investor, that £8 billion comes straight out of the dividend pot. That’s why the shares are tanking—everyone is worried their quarterly check is about to get a whole lot smaller.

​history repeating: have we been here before?

​I’m telling you, windfall taxes are like that one uncle who shows up uninvited to every family party. The UK has done this before. Margaret Thatcher—hardly a hater of big business—slapped a tax on banks in 1981 for the exact same reason: they were making too much money from high interest rates. Tony Blair did it to utilities in 1997, and Rishi Sunak did it to energy companies in 2022.

​The thing is, the banks survived every single time. In 1981, they complained, they paid, and then they went back to making money. But in 2025, the economy feels a bit more fragile. To be fair, Barclays and NatWest are currently forecasting profits of over £52 billion. When you’re making that much money, it’s hard to play the victim. But for everyday investors, it’s a reminder that no profit is ever "safe" when the government is broke.

​The dividend dilemma: Should you bail or stay?

​The thing is, most people hold UK bank stocks for one reason: dividends. NatWest yields around 5%, which is properly juicy. But if a 15-20% profit hit comes from this tax, those payouts are definitely at risk. I’m telling you, you might see dividends cut by 10% or more if the chancellor decides to go full-steam ahead with the IPPR’s plan.

​But let's look at the flip side. To be fair, banks are still incredibly profitable. Even with a tax, NatWest and Lloyds are still going to be making billions. If the tax is temporary—say, 2 or 3 years—the shares might bounce back quickly once the uncertainty is over. I’m telling you, the "fear" of the tax is often worse than the tax itself. We saw it with energy companies in 2022; they dipped, people panicked, and then they recovered 50% over the next two years.

​faq – stuff you actually want to know (no fluff)

​q: Will the windfall tax definitely happen in the November budget?

The thing is, nobody knows yet. Rachel Reeves (the chancellor) has been very quiet about it. But I’m telling you, she needs at least £20 billion to balance the books, and banks are "easy pickings" politically. It’s about a 50/50 toss-up right now. Investors will be watching her speeches closely for signals over the next few weeks.

​q: Why are banks so profitable in 2025?

This is all about banks making more from loans than they pay out on deposits. Mortgage rates climbed quickly, savings rates moved slowly, and the extra £22 billion in interest from the Bank of England only added fuel to the profit machine.

​q: Should I sell my NatWest Group and Lloyds Banking Group shares now?

It comes down to your personal risk appetite and investment goals. If the recent volatility feels too stressful, taking some profits or trimming your holdings may help. But reacting emotionally to a small drop can sometimes lead to poor timing. Keeping a diversified portfolio is key — you never want to be overly dependent on one market or sector.

​q: How does this compare to energy company taxes?

The thing is, energy companies were taxed because of a war (Ukraine), causing a price spike. Banks are being targeted because of government policy (QE). The details may differ, but it all leads to the same outcome: the government wants its portion. I’m telling you, energy stocks eventually recovered, and banks likely will too.

​q: What’s the target for NatWest shares if the tax doesn't happen?

To be fair, if the chancellor ignores the IPPR, these shares could pop 5-10% almost overnight. Analysts are still bullish on NatWest’s long-term returns. The fundamentals of the business are stronger than many people think — politics is the main thing holding it back.

​the final verdict

​The bottom line? NatWest’s 5% plunge is a wake-up call for every UK investor. We are in a high-profit, high-tax era, and nothing is guaranteed. To some, the Institute for Public Policy Research’s £8 billion plan looks justified — but investors see it as a significant barrier to growth and profits.

​What’s your move? Are you prepared to weather the turbulence, or are you looking for safer ground in tech and international shares? let’s talk in the comments—the November 26 budget is the one to watch, and honestly, the drama is just beginning.