A landlord with several properties may ask only whether interest costs will rise next year. The more useful question is whether the current debt structure still supports the portfolio’s cash flow, resilience and future plan. An accountant who recognises that distinction can bring a specialist finance broker into the conversation while there is still time to compare refinancing, product transfers, partial deleveraging and staged solutions.
The Client Situation
A property company owns five rental properties financed with interest-only mortgages. Several fixed rates end within six months. The accounts show healthy rental income, but the client is also planning a purchase and wants to extract capital for refurbishment. One property has risen substantially in value; another has weaker rent and a short lease.
The client may initially ask for “the best five-year rate”. That request does not establish whether all five properties should move, how much capital is available, which debts should remain, whether the rents pass current stress tests or whether refinancing fees outweigh the saving.
The accountant can see the finance cost, retained cash, tax obligations and business plan. That visibility creates a natural referral point.
The cheapest individual product does not necessarily produce the best portfolio outcome. Arrangement fees, valuations, legal costs, early-repayment charges, rental stress and future flexibility can outweigh a small rate difference.
Why Portfolio Refinancing Receives Specialist Underwriting
The Prudential Regulation Authority says lending to portfolio landlords is inherently more complex because of aggregate debt, cash flows across multiple tenancies and property or geographic concentration. Its standards support a specialist underwriting approach based on the borrower, full portfolio and alternative sources of income.
Four or more mortgaged buy-to-let properties is the recognised portfolio threshold in the PRA framework. Individual lenders can apply additional definitions and procedures. The Mortgage Works currently treats purchases and capital-raising cases with four or more mortgaged properties as portfolio business, while its published treatment of like-for-like remortgages has additional thresholds. Paragon requires limited-company and LLP applications to be submitted through its portfolio process even where the borrower is not a portfolio landlord under the PRA definition.
The lesson for accountants is simple: property count is only the first trigger. Entity type, loan purpose, aggregate exposure and lender-specific policy can bring specialist portfolio analysis into a case.
When the Accountant Should Bring in a Finance Broker
Fixed-rate expiries are concentrated
If several mortgages revert in the same quarter, the company may face a sudden step-up in interest expense. Early analysis allows the client to compare product transfers with external refinancing and decide whether to stagger future maturities.
The accounts show shrinking interest cover
Rental income may be stable while finance costs, insurance, maintenance, agent fees or compliance costs rise. A lender’s stressed affordability calculation is different from accounting profit, but weakening cash cover is an early warning.
The client wants capital for another purpose
A landlord may want funds for a deposit, refurbishment, tax payment, business investment or shareholder distribution. Capital raising can trigger different lender stress rates, evidence and loan-purpose rules from a like-for-like remortgage.
Properties have materially different leverage
One low-LTV asset may support capital release while a lower-yielding property cannot carry more debt. Refinancing each property to the same percentage can be inferior to allocating debt strategically.
The ownership structure has changed
New shareholders, a holding company, an intercompany loan or a transfer between personal and company ownership can narrow lender choice and add legal work.
The client is planning to sell or refurbish
A long fixed rate with an early-repayment charge may conflict with a disposal. A property requiring works may need a different short-term or refurbishment route before standard buy-to-let finance.
One property is distorting the portfolio
A short lease, low rent, unusual construction, concentration issue or title defect can cause a lender to reject or constrain a package. Identifying it early allows the strategy to separate the difficult asset.
The portfolio has grown without a debt strategy
Mortgages accumulated one transaction at a time can produce duplicate expiry dates, multiple lender exposures, inconsistent covenants and avoidable administrative costs.
The Minimum Portfolio Dashboard
Before discussing products, create one consistent schedule:
| Field | Why it matters | Accountant insight |
|---|---|---|
| Property and ownership | Identifies borrower, entity and concentration. | Reconcile personal, SPV and group ownership. |
| Value and valuation date | Drives individual and aggregate LTV. | Flag estimates that are historic or unsupported. |
| Rent and tenancy | Supports lender ICR and property eligibility. | Distinguish contracted gross rent from accounting income. |
| Mortgage balance | Shows debt and redemption requirement. | Reconcile to lender statements where possible. |
| Rate, payment and expiry | Models current and future cash flow. | Expose expiry concentration and reversion risk. |
| Early-repayment charge | Can make immediate refinancing uneconomic. | Compare the charge with the expected saving. |
| Property type and condition | Changes lender eligibility and valuation. | Flag HMO, multi-unit, commercial or refurbishment assets. |
| Planned action | Prevents the mortgage term conflicting with sale or works. | Connect finance to the business plan. |
The schedule should cover every relevant mortgaged rental, not only the properties whose products are expiring. The Mortgage Works publishes aggregate ICR and LTV tests for portfolios and includes properties owned through limited companies. Paragon requires a completed property schedule and may request a business plan and cash-flow forecast.
The Review May Produce More Than One Route
Product transfer with the existing lender
This may reduce valuation or legal work and avoid full underwriting, depending on the lender and requested changes. It can be appropriate where the current debt, ownership and capital requirement remain unchanged. It should still be compared on total cost and flexibility.
Like-for-like external remortgage
A new lender repays the existing balance without material capital raising. Current criteria may apply a different stress treatment from a capital-raising application.
Selective refinancing
Only properties that benefit from moving are refinanced. Others remain with the current lender because of early-repayment charges, attractive existing terms or property-specific constraints.
Capital raising from selected assets
Lower-leveraged, higher-yielding properties may support additional borrowing more efficiently than applying the same LTV across every asset.
Portfolio consolidation
Several loans move to one lender to simplify administration or negotiate at portfolio level. Concentrating exposure can also reduce future flexibility, so the trade-off should be explicit.
Debt diversification
The landlord may deliberately use more than one lender or stagger terms to reduce a single maturity event and preserve options if lender criteria change.
Short-term bridge to long-term finance
Where a property needs work, a lease extension or title resolution, interim finance may be considered before a standard term mortgage. Exit assumptions require careful testing.
Compare Total Cost, Not Only the Headline Rate
A portfolio can magnify both savings and transaction costs. The analysis should include:
- interest payments over the comparison period;
- product fees, including whether they are added to each loan;
- valuation and legal costs across all properties;
- broker fees and specialist professional costs;
- early-repayment charges and exit fees;
- cashback or free-valuation and legal incentives;
- the cost of time on a lender’s reversion rate;
- lost rent or works delay where the transaction affects occupation;
- the cost of a lower valuation or reduced maximum loan; and
- future exit flexibility, portability and early-repayment structure.
Willow’s published five-property SPV case is directly relevant. The portfolio had consistent rent and moderate LTVs, but the objective was not simply a new interest rate. The strategy sought to minimise transaction costs across multiple properties while retaining flexibility for future growth.
A Useful Accountant Question
“What does the portfolio need the debt to do over the next three to five years?” That answer is more valuable than asking which lender is cheapest today.
What the Accountant May Need to Provide
The lender’s request will depend on borrower and transaction, but may include:
- recent accounts for the property company or relevant group entities;
- an explanation of exceptional income, costs or connected balances;
- confirmation of directors, shareholders and group structure;
- details of tax liabilities or other material commitments where requested;
- a cash-flow forecast or business plan based on assumptions supplied by the client;
- evidence supporting the use of capital raised;
- rental information that reconciles with company records; and
- factual commentary on an intercompany or director’s loan.
The accountant should label historical results, management information and forecasts clearly. They should not certify that future rents will be achieved, promise company solvency or recommend a lender.
Paragon’s current criteria state that future affordability may limit borrowing and that it may request a business plan and cash-flow forecast. Its published portfolio submission requirements include a property schedule before full underwriting. That shows why the finance adviser should issue a targeted evidence list early.
An Illustrative Five-Property Review
An SPV owns five residential properties worth £1.8 million with £900,000 of borrowing. Three fixed rates expire within four months. A fourth loan has another two years to run with a meaningful early-repayment charge. The fifth property has the strongest rent and lowest LTV. The company wants £120,000 for a sixth acquisition and planned works.
The review maps each property and finds:
- moving the fourth loan now would cost more than the expected interest saving;
- one lower-yielding property fails the desired capital-raising stress test;
- the fifth property can support much of the required release without pushing every asset to the same LTV;
- using two completion dates reduces the risk of five simultaneous legal transactions;
- staggering the new fixed-rate expiries avoids recreating the same concentration; and
- the acquisition deposit and works budget require different timing.
The resulting strategy may combine an existing-lender switch, two external remortgages and capital release against the strongest asset. It is more complicated than one portfolio product, but it may be cheaper and more resilient after all costs.
This is where the accountant’s knowledge of cash flow and planned expenditure materially improves the broker’s work.
Where the Professional Boundaries Sit
The accountant explains financial history, current liabilities, tax-payment needs, connected-company balances and the client’s business plan. They can identify when rising interest or concentrated expiries threaten distributable cash or working capital.
Willow analyses lender criteria, mortgage products, rental stress, valuations, security, capital raising, sequencing and total finance cost. It then makes a regulated recommendation where the borrowing falls within regulation, or provides appropriate advice for unregulated property finance.
The solicitor handles redemption, new charges, title, lender conditions and any corporate or guarantee documentation. A valuer independently assesses property and market rent for the lender.
The accountant should introduce the issue, not solve the mortgage. A concise referral with a property schedule and objective is enough.
Common Mistakes to Avoid
- Waiting for the first rate to expire: portfolio underwriting, valuations and legal work require time.
- Comparing only headline rates: repeated product, valuation and legal costs can reverse the result.
- Refinancing every property uniformly: different assets can support different debt strategies.
- Ignoring early-repayment charges: moving a good existing loan can destroy savings elsewhere.
- Using outdated values or rents: the desired capital release may disappear after valuation.
- Submitting an incomplete schedule: undisclosed mortgages or inconsistent data undermine underwriting.
- Locking every loan to the same expiry: convenience today can create concentration risk later.
- Raising capital without a documented purpose: loan-purpose criteria and business cash flow matter.
When to Involve Willow
An early anonymous discussion is particularly useful where:
- two or more mortgage products expire within the next year;
- interest expense has materially increased or is forecast to rise;
- the company needs capital for acquisition, works, tax or another business purpose;
- portfolio LTV or rental cover is uneven;
- properties sit across personal ownership and several SPVs;
- one asset is difficult to mortgage or planned for sale;
- shareholders want drawings while the business is refinancing;
- an intercompany loan or guarantee connects the property business to another company;
- the landlord is approaching a lender exposure limit; or
- the existing mortgages were arranged without a common portfolio plan.
The first review needs no client name. Share values, rents, balances, rates, expiry dates, ownership, proposed capital use and the three-to-five-year plan.
Relevant Willow Case Evidence
Willow refinanced five residential investment properties held within one SPV as their fixed rates approached expiry. The strategy considered consistent rent, moderate LTVs, transaction costs across multiple properties and flexibility for future growth. Read the full case study →
Related accountant guides cover transferring personally owned property to a company and testing whether a property structure is financeable.
A Client’s Portfolio Debt No Longer Matches Their Plan?
Share an anonymous property schedule and the intended outcome. Willow can assess the refinance as one strategy rather than a collection of rate expiries.
Frequently Asked Questions
The objective is a resilient portfolio funding plan, not simply a collection of lower rates.
How early should a landlord review an expiring portfolio mortgage?
A review commonly starts well before expiry so valuation, lender underwriting, legal work and portfolio evidence can be completed without relying on the current lender’s reversion rate. The appropriate lead time depends on the portfolio and product.
Should every property be refinanced at the same time?
Not necessarily. A portfolio review may support retaining some loans, switching others, refinancing selected assets or staggering future maturities. Transaction costs and long-term flexibility matter alongside rates.
Why does the lender need the whole property schedule?
Portfolio underwriting considers aggregate debt, rental cash flow, leverage, property concentration and the borrower’s wider position. One well-performing security may not be assessed in isolation.
Can refinancing release capital for another purchase?
Potentially, subject to property value, rental stress, maximum LTV, lender policy and the wider portfolio. The intended use of funds and effect on cash flow should be established before application.
What can an accountant contribute to the refinance?
The accountant can clarify entity structure, rental and business cash flow, tax liabilities, accounts, connected balances and the client’s planned use of funds. They should not recommend the mortgage product unless authorised to do so.
Can the case be discussed anonymously first?
Yes. A first review can use an anonymous property schedule showing values, rents, balances, rates, expiry dates, ownership and objectives.

