In an extraordinary U-turn on Megxit, they are understood to be relocating to a private, non-royal residence outside London, with Prince Archie, seven, and Princess Lilibet, five, set to enrol at a British school.

But there are currently no plans for either Harry or Meghan to resume their roles as working royals, which means they will remain as private 'financially independent' individuals.

The Sussexes' departure from the US has raised questions over what will happen to their $14.65million mansion in the super-wealthy enclave of Montecito. They also still own a £6.3million villa on Portugal's idyllic Melides coast.

Harry and Meghan bought their sprawling nine-bedroom home in Montecito from Russian tycoon Sergey Grishin on June 18, 2020.

The 14,563-square-foot home, known as 'The Chateau', sits on 5.4 acres of land and boasts a swimming pool, a tennis court and immaculate gardens.

But a Santa Barbara real estate source has told the New York Post there 'have been rumblings' the couple will now sell it. Astonishingly, it costs more than $650,000-a-year in mortgage costs and taxes alone, the US outlet reports.

The Daily Mail previously reported that Harry and Meghan bought the luxury property after securing a $9.5million mortgage, implying that they made a down-payment of more than $5million.

At typical interest rates, the couple would likely be paying around $40,000 a month or $480,000 a year in order to repay the mortgage on a standard 30-year term.

County tax history obtained by The Post shows that the bill has increased every year the Sussexes have lived there, from $138,629 to $141,645, then $144,229, $146,930 before this year's $149,668.

That means Harry and Meghan have spent around $721,000 in property taxes alone.

The Daily Mail previously reported that the Sussexes had hired $9,000-a-day security firm GDBA to protect them in Los Angeles.

If GDBA were hired for 365 days a year at that rate, Harry and Meghan would be left with a $3.3million bill for security alone.

'I cannot imagine ever wanting to let go of this beautiful piece of property, but hanging onto it comes at a steep cost, so they might have to,' a source told the Post.

'It likely will be a few months before they list, or maybe they will give the UK a year first to see how that plays out,' the source added. 'But if they do decide to plant roots in the UK, I don't see a world where they will keep this home.'

Before doing so, 95 per cent of their income was generated through the Duchy of Cornwall, with the other 5 per cent covered by the Sovereign Grant. They are no longer entitled to this and they must fund their security themselves. 

The Sussexes and other high-profile claimants also face paying millions towards the legal costs of the Daily Mail publisher Associated Newspapers after they lost their doomed phone hacking case.

Associated said its costs are around £34million.

Leading luxury real estate broker Jason Streatfield has estimated that Harry and Meghan could list the mansion for as much as $75million.

He said there have been three sales in Montecito above $50million this year. 

When the Sussexes bought it for $14.75million in 2020, it had been on the market for five years at an original listing of $34.5million.

After getting a cut-price deal on it, they could now rake in millions, according to Mr Streatfield. He expects it to be sold for somewhere between $65 and $75million. 

The house has nine bedrooms, 16 bathrooms and sits on 5.4 acres of land with immaculately clipped hedges bordering the estate's stone-pillared entry gates.

Property listings say the home took nearly five years to build and included a library, office, spa with a separate dry and wet sauna, a gym with a stripper pole, game room, arcade, theatre, wine cellar and five-car garage.

The estate has sweeping lawns, tiered rose gardens, tall Italian cypress trees, blooming lavender, century-old olive trees, a tennis court, tea house, children's cottage and a pool. It also boasts a two-bedroom, two-bath guest house.

Since becoming 'financially independent' from the Royal Family, Harry and Meghan have tried multiple ways of forging their own brands and income.

In 2020, they signed a reported $100million deal with Netflix through their Archewell brand. This included With Love, Meghan, the lifestyle series where the Duchess of Sussex cooked with her celebrity friends.

Meghan also launched her Archetypes podcast with Spotify, but their $20million deal ended on bad terms when the royal couple were called f***ing grifters' by an executive at the streaming service.

Harry, meanwhile, signed a major book deal for his memoir Spare, where he sparked a major backlash for revealing explosive details about his family, and Meghan continues to sell jams and other lifestyle products through her As Ever brand.

Tom Garcia-Bridgeman, a PR consultant at Rhizome Media Group, told the Daily Mail: 'The book deals, Netflix documentaries and product launches were supposed to establish the couple as a global brand independent of the royals, but their return to the UK may suggest that approach hasn't worked, or at least a rethink has happened.

'The American dream promised an opportunity to forge an entirely new identity outside the Royal Family, yet years later it is still their connection to the monarchy that generates the greatest global interest.

'Meghan still needs to use her Duchess of Sussex branding to sell blackberry jam and candles.'

He added: 'The biggest PR risk is appearing to want the benefits of royalty without the sacrifices. If they lean on royal associations heavily while remaining commercially independent, critics will revive the "half-in, half-out" argument.

Nimesh Shah, CEO of Blick Rothenberg, said: 'Good to see Harry and Meghan achieve 6 full tax years of non-UK residency to manage the "temporary non-resident" rules for capital gains tax. They have clearly had some good tax advice and the timing of their move back to the UK is immaculate.'

Dhana Sabanathan, a leading partner at law firm Michelmores, added that 'staying away a bit longer would have given them a much better tax result'.

'If they had remained non-UK tax resident for 10 consecutive tax years before returning, they could have enjoyed relief on their non-UK income and gains for the first four years of their return. Staying away for 10 years could have also enabled Harry to protect his non-UK assets from inheritance tax.

'The pattern we are seeing are expats who have been long term in the US, raised families, and established successful businesses there, relishing the opportunity to return or spend more time in the UK without bearing the full brunt of UK tax on their worldwide assets for a period of time.

'US citizens remain subject to subject to worldwide US taxation even when they leave the US. There have been no public reports of Harry obtaining US citizenship, so his tax affairs are likely to be simpler than Meghan's on his return.'

It comes as it emerged King Charles was only told by his son on Sunday that he plans to move back to the UK later this month, while the Prince and Princess of Wales have also been informed.

It is understood that while he 'welcomes' the chance to see Harry and his family in a private and personal capacity, the King is clear that there will be 'no alteration' to the Duke and Duchess's role and status as private individuals and non-working members of the Royal Family in keeping with their 'clearly expressed wishes and agreement over past years'.

Sources insist, however, it is not in the Sussexes' 'plan' to return to the royal fold. The Daily Mail also understands that no mention of the family's return was raised or discussed when Harry, Meghan and their children met with the King at Highgrove earlier this summer.

Last night Harry was pictured broadly smiling at a roundtable event in Washington discussing increased support for veterans.

Harry was already scheduled to visit Britain to attend a WellChild Awards event next month and was set to stay in a room at Buckingham Palace.

But the Duke, 41, and Duchess, 45, no longer require accommodation for their stay with the whole family believed to be returning for an extended period within the next two weeks.

Archie and Lilibet will be enrolling at a school in September but it is not yet known whether the move will be a permanent one. The location of Harry and Meghan's new home has not been revealed for privacy reasons.

Harry and Meghan's representatives have been approached for comment.