Private Bank VS Broker HNW Mortgages UK

Private banks lend up to £30 million and beyond at preferential rates against assets under management. Specialist HNW mortgage brokers compare those terms against the wider HNW lender market and place the case where it fits cleanest. Going direct to a private bank works when you are already a wealth client with substantial AUM and your case fits the bank’s internal criteria without compromise. Going through a HNW mortgage broker works when you want to compare lenders, your case has any element a single bank may struggle with, or you want to keep your AUM where it currently sits and arrange the lending separately.

This guide walks through both routes for £1m to £30m+ residential mortgages, including a worked comparison on a £4 million case where the answer is not obvious.

Private bank mortgages

What does a UK private bank offer for HNW mortgages?

A UK private bank mortgage is residential lending arranged by the lending arm of a private bank, typically tied to a wider wealth management relationship. The bank assesses the case as part of its overall view of the client. Pricing, terms and structure all sit within the bank’s own underwriting and product framework. There is no shopping around, the lender is fixed at the start of the conversation.

The active UK private bank lenders for HNW residential cases include Coutts, Weatherbys, Arbuthnot Latham, Investec, Hampden & Co, Lombard Odier, Julius Baer, UBS Wealth Management and JP Morgan Private Bank. Each has its own minimum loan size, AUM expectation, LTV ceiling and rate band. Loan sizes typically run from £3 million to £30 million and beyond, with the largest cases (£20m+) negotiated case-by-case at the relationship director level.

What private banks offer that the high street does not is manual, narrative-driven underwriting. The bank is not running your application through an automated affordability model. A senior underwriter reads the case, reviews the asset position holistically, and prices the deal based on the wider relationship value. This is what makes private banks suitable for borrowers whose income is irregular, whose wealth sits in assets, or whose situation does not fit any standard underwriting box.

The trade-off is the AUM expectation. Most UK private banks expect £1 million to £3 million of investable assets transferred to their wealth management arm as part of the lending relationship. The mortgage is priced more keenly because the bank captures the wider wealth fees. For clients without that level of AUM to transfer, the rate will be less competitive or the loan may not be available at all. There are exceptions: some private banks offer “dry lending” without an AUM requirement, where the mortgage is arranged on its own merits at market rate.

HNW mortgage brokers

What does a UK HNW mortgage broker do differently?

A HNW mortgage broker is an FCA-authorised intermediary that specialises in £1 million plus residential lending and shops your case across the full UK HNW lender market. Independent brokers carry 50 to 100+ lenders, including private banks, specialist HNW underwriters, building society HNW manual underwriting desks, challenger banks and specialist family offices. The broker does not lend; they place the case with the lender that fits.

The core value the broker adds is the lender list. Most HNW borrowers approach two or three private banks directly, hit one bank’s specific criteria limit, and assume the wider market will say the same. In our experience, that is rarely true. A borrower declined by their existing private bank for a £4 million mortgage frequently gets a sensible offer from a building society’s HNW desk that the borrower did not know existed.

Specialist HNW brokers package the case for each lender’s internal criteria. The bonus structure is presented one way to a private bank that uses two-year averaging, another way to a specialist underwriter that takes 100% of last year. Carried interest is presented one way to lenders comfortable with the asset class, another way to lenders who only know base salary. The case structuring matters more than the lender’s published rate.

HNW broker fees vary across the market. Some brokers charge a percentage of loan amount (0.25% to 1%, occasionally with a cap). Others charge a flat fee regardless of loan size. Fox Davidson charges a flat broker fee of £495 payable on application. The broker also receives a procuration fee from the lender on completion, fully disclosed in the Initial Disclosure Document.

FCA permissions matter. Independent brokers operate under MCOB 4.7A suitability rules. The broker owes you a suitability duty independent of the lender. If you ever need to complain, you can take the matter to the Financial Ombudsman Service, with eligibility preserved on every regulated residential HNW mortgage we arrange.

Direct comparison

Private bank vs broker, side by side

When to go direct

When does going direct to a private bank work better?

The case where direct beats broker is reasonably narrow. You are an existing private bank client with £1 million plus of assets under management at the bank. Your case fits the bank’s internal criteria without needing to be argued. You want the wider wealth management relationship and you are happy to be priced on the basis of total wallet share. The bank wants the lending and is willing to price it preferentially because it captures the wider fees.

A simple, well-presented case for an existing client typically clears at the same speed direct as via broker. The rate will usually be 0.15 to 0.4 percentage points below market because the bank is pricing the relationship, not just the loan. On a £5 million 5-year fixed at 0.25% saving, that is around £62,500 of interest over the fixed period. If the AUM transfer cost (loss of investment flexibility, tax wrappers, fee structure) is less than that, the direct route is the rational choice.

A second case is where the borrower’s profile is unusual in ways the broker market cannot help with. A foreign national whose existing wealth manager is a private bank with a UK lending arm may find that bank willing to lend on its own client list when the wider UK market would not. The internal relationship is doing work the open market cannot replicate.

The third case is preference. Some HNW borrowers prefer the direct relationship for reasons that are not strictly economic. The single-relationship model is simpler. The senior contact at the bank is a known counterparty. The lending fits inside an existing wealth conversation. There is no broker fee, even if the rate is not optimal across the wider market. These reasons are valid and we frequently advise clients in this position to go direct.

When to use a broker

When does using a HNW mortgage broker add the most value?

The case where a broker adds most value is the case where any single bank’s criteria does not fit cleanly. That covers a wide profile range.

Multiple lender comparison. If the rate spread between options is more than 0.2 percentage points on a £2 million plus loan, the saved interest over the fixed period easily exceeds any broker fee. The broker shops two to four lenders in parallel and lets the client pick on combined rate, term, fees and exit flexibility. A direct application sees one lender’s number; the broker presents the curve.

AUM kept separate. If you have £2m of investable assets you want to keep with your existing wealth manager, a private bank requiring AUM transfer is a non-starter. Specialist HNW brokers identify the private banks that offer dry lending without an AUM requirement, and the building society HNW desks that have no AUM expectation at all. Same client, different lender, no AUM disruption.

Asset-rich, low declared income. If your declared annual income is below the bank’s automatic affordability threshold (often £300k to £500k), the bank’s standard underwriting will struggle even if your asset position clearly meets the FCA HNW exemption under MCOB 11.6.15R. Specialist HNW brokers package the case as asset-led and route it to lenders whose underwriters work with this profile. Private banks that do this well include selected desks at Hampden & Co, Investec and Arbuthnot Latham. We can name the right desk before formal application.

Foreign income or non-UK residency. Foreign currency income (USD, EUR, CHF, JPY, CAD), dual residency, non-UK domicile, expat status, each narrows the lender list significantly. A direct private bank may simply decline. A broker maps the residual lender list quickly and pre-approves the case before you commit to a property. Our HNW guide on asset rich income poor mortgages UK covers the income-vs-asset routing in more depth.

Complex ownership structures. SPV ownership, family investment companies, bare or discretionary trusts, offshore vehicles. Most private banks underwrite these only at specific desks. The broker knows which desks. Naming the structure correctly at the start of the conversation halves the time spent on lender selection.

Switch capability. If the first lender declines or offers terms that do not work, the broker re-shops the case to the next lender on the list. The direct route does not have this. Re-applying to a second private bank from scratch resets the clock and risks the credit footprint.

Pre-approval certainty before committing. Specialist HNW brokers obtain Decision in Principle from the right lender before you commit to a property. This is the difference between negotiating as a cash-equivalent buyer with mortgage certainty and negotiating with a “we hope it lands” position. On £2 million plus purchases the negotiating power matters.

Hybrid route

The hybrid approach for UHNW clients

For UHNW clients (typically £10 million plus net worth, £5 million plus loan), the most common route we see is hybrid. The broker initiates two to three lender approaches, secures the best terms, and the client maintains a direct relationship with the chosen lender post-completion. The broker captures the competitive tension during placement; the client captures the relationship benefit afterwards.

This approach is especially common where the client wants the optionality of the wider relationship (concierge, FX, succession planning, lending against unlisted holdings) but does not want to give up rate competition during placement. Most private banks are comfortable with this once the broker hands the relationship over at completion.

The hybrid route works less well for clients who want the AUM transfer to set the rate. In that case the bank pricing is bundled with the AUM commitment, and broker negotiation does not move the rate as much as it does on dry lending. Here the direct route is cleaner.

Worked example

£4m mortgage, £600k income, £4m liquid: two routes compared

Route A: direct to existing private bank

The private bank where the client already held £1.8 million offered a £4 million 5-year fixed at 4.85% on interest-only terms with a 20-year term. The bank required the £2.2 million held with the independent wealth manager to be transferred onto the bank’s wealth platform within 6 months of completion. Maximum LTV offered: 75%, requiring a £1.5 million top-up of the deposit. Process took 7 weeks from instruction to offer. Lender arrangement fee 0.75% (£30,000). Valuation £4,500. Legal £6,000.

Total upfront cost: £40,500. Rate cost over 5 years on £4m at 4.85% interest-only: £970,000 in interest. AUM transfer cost: lost portfolio flexibility, lost £4-6k in transfer fees on the wealth manager side, no additional cost from the private bank.

Route B: via Fox Davidson HNW broker

Fox Davidson approached three lenders in parallel. Lender 1 (existing private bank): same terms as Route A above. Lender 2 (a different private bank with a dry lending option): £4 million 5-year fixed at 5.10% interest-only over 20 years, no AUM requirement, 80% LTV available. Lender 3 (a building society HNW manual underwriting desk): £4 million 5-year tracker at base + 1.85% (current rate 5.60%) on interest-only, no AUM, 80% LTV. The client picked Lender 2.

Approved at 5.10% 5-year fixed, interest-only, with 80% LTV. Process took 5 weeks from instruction to offer. Lender arrangement fee 0.65% (£26,000). Valuation £4,800. Legal £6,000. Fox Davidson broker fee £495 payable on application. Procuration fee paid by lender on completion (disclosed at IDD, around £8,000).

Total upfront cost: £37,295. Rate cost over 5 years on £4m at 5.10% interest-only: £1,020,000 in interest. AUM transfer cost: nil, both wealth pots stayed where they were.

The trade-off

Route A saves £50,000 in interest over the 5-year fixed period. Route B preserves £2.2 million of investment flexibility and avoids the AUM transfer process, plus gives a higher LTV ceiling that did not need to be exercised but was available. The client picked Route B because the AUM transfer cost in opportunity terms (preferred wealth manager, established CGT positioning, existing tax wrappers) was worth more than £50,000 over five years.

If the same client had been a less established wealth manager relationship with no tax-wrapper considerations, Route A would have been the rational choice. The specific answer depends on what the AUM transfer actually costs you in opportunity terms, not just in fees.

FAQs

Frequently asked questions