Mortgages

£9m Offset Mortgage Raised To Acquire London Home

At P10 Financial, we find offset mortgages are a massively under utilised product amongst high net worth clients. The flexibility the offset allows, it can be a great tool to have in your arsenal, especially if you want to close transactions fast.

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Background

In this instance P10 were mandated by an existing client to assist them with the best mortgage structure to acquire a second home in London. We were able to deliver the mortgage in 5 weeks from start to finish which allowed our client to exchange swiftly on their purchase.

The mortgage was structured through a private bank, which allowed us to use a personalised underwriting approach to the clients complex income situation. We delivered an offset mortgage that supports the clients financial circumstances and allows them to enjoy the liquidity an offset facility provides.

How the Offset Mortgage Works

An offset mortgage links your cash savings held with Handelsbanken directly to your mortgage balance. Rather than earning interest on your savings, those funds reduce the amount of mortgage debt on which interest is calculated.

For example, if you hold £9m in cash savings with the bank, your entire mortgage balance is effectively offset — meaning you would pay zero interest. Conversely, if you hold £4,500,000 in savings, interest is only charged on the remaining £4,500,000 of the mortgage.

Savings Held (£)	Effective Mortgage Balance (£)	Monthly Interest Saving
£9,000,000	£0	£40,200 (full saving)
£4,500,000	£4,500,000	£20,100
£2,000,000	£7,000,000	£8,934
£0	£9,000,000	£0 (full payment applies)

Illustrative Offset Examples

Why Are Offset Mortgages Valuable to HNWI’s

Offset mortgages are particularly effective for High Net Worth Individuals (HNWIs) for several interconnected reasons:

Tax Efficiency

This is arguably the biggest advantage. HNWIs are typically higher or additional-rate taxpayers (40–45%). Any interest earned on savings is subject to income tax at those rates. With an offset mortgage, savings don't earninterest — they reduce mortgage interest instead. Since mortgage interest reduction isn't taxable income, the effective return on those offset savings is equivalent to the gross mortgage rate. For a 45% taxpayer, a savings account would need to pay over 9.7% gross to match that net benefit.

Large Liquidity Pools

HNWIs tend to hold significant liquid assets — proceeds from business sales, bonuses, investment distributions, or cash awaiting deployment. These funds can sit idle in an offset account, actively working to reduce interest, without being locked away. The money remains instantly accessible if needed for an investment opportunity or large expenditure.

Irregular and Lumpy Income

Many HNWIs — entrepreneurs, executives, partners in professional firms — receive income in large, infrequent chunks (annual bonuses, dividends, carried interest). An offset mortgage accommodates this perfectly: when cash is flush, it offsets heavily and reduces the interest burden; when cash is deployed elsewhere, payments revert to normal. This is far more flexible than overpaying and then needing to borrow back.

Complex Wealth Structures

HNWIs often have money moving between entities — personal accounts, trusts, family investment companies, business accounts. Having a flexible offset facility means cash temporarily parked personally (before being deployed into a structure) is always working rather than sitting dormant.

No ERC Risk

Standard fixed-rate products often carry significant Early Repayment Charges, which penalise HNWIs who may want to repay a large lump sum (e.g. following a liquidity event). An offset product with no ERCs, like this Handelsbanken deal, removes that friction entirely.

Avoiding the Savings–Debt Paradox

Many financially sophisticated clients feel psychologically and practically uncomfortable holding large cash savings alongside a large mortgage — it feels inefficient. The offset structure resolves this elegantly: you maintain full liquidity but the cash is functionally working against the debt at all times.

Key Mortgage Overview

Detail	Information Mortgage Balance (£)
Lender	Private Bank
Mortgage	£8,900,000
Loan to Value (LTV)	70%
Rate Above Base	1.21% above Private Bank Base Rate
Mortgage Product	Variable Rate Offset Mortgage — 5 Year Product
Early Repayment Charges	None — repay at any point without penalty

Illustrative Offset Examples

P10 are experts at providing high level professional advice for HNWI’s, this case study is another example of the creative structures the business delivers on a daily basis. If you are a high-net-worth individual facing complex mortgage requirements, whether for property purchase, remortgage, or wealth planning, P10 Financial Group is here to help.

We specialise in crafting bespoke financial strategies that align with both your personal and professional goals.