MCOB: Mortgages and Home Finance Conduct of Business

What It Is

The Mortgages and Home Finance: Conduct of Business sourcebook (MCOB) is the FCA's rulebook governing the sale, arrangement, and administration of residential mortgages and home finance products in the UK. It applies to first-charge mortgages, home purchase plans, home reversion plans, and regulated sale and rent back agreements.

MCOB covers the entire mortgage lifecycle. MCOB 2 sets out general conduct standards. MCOB 3 governs financial promotions. MCOB 4 deals with advising and selling — the heart of the sourcebook — including disclosure requirements, suitability assessment, and the rules around advised versus non-advised sales. MCOB 5 covers pre-application disclosure, including the European Standardised Information Sheet (ESIS) that replaced the Key Facts Illustration (KFI) for most new applications. MCOB 6 addresses disclosure at the offer stage. MCOB 7 covers the conditions that must be met at completion. MCOB 9 deals with equity release. MCOB 12 covers charges. MCOB 13 — increasingly the focus of FCA attention — addresses arrears, payment shortfalls, and repossession.

MCOB is one of the older FCA sourcebooks and reflects the regulatory response to the mortgage mis-selling of the early 2000s and the payment difficulties that followed the 2008 financial crisis. It has been updated substantially over the years, most recently to integrate Consumer Duty expectations and to reflect the FCA's updated guidance on mortgage advice suitability.

Why the FCA Cares

Residential mortgages are the largest financial commitment most UK consumers will ever make. The potential for harm — unaffordable lending, unsuitable advice, inadequate arrears handling — is significant and systemic. The FCA estimated that around 11 million residential mortgage contracts were outstanding in the UK in 2024, representing over GBP 1.6 trillion of lending.

The regulator's focus on mortgages intensified after the 2008 financial crisis, when payment difficulties exposed widespread affordability assessment failures. The Mortgage Market Review (MMR), implemented through MCOB in 2014, fundamentally reformed affordability assessment requirements — requiring firms to assess income, committed expenditure, and essential living costs, and to stress-test affordability against future interest rate increases.

More recently, the FCA has focused on mortgage prisoners — borrowers trapped on high rates because they cannot pass modern affordability assessments despite meeting their current payments. The regulator has also examined the transition from interest-only to repayment mortgages, the treatment of customers in payment difficulty, and the quality of mortgage advice.

Consumer Duty has added a further layer. The FCA now expects mortgage firms to demonstrate not just that they followed MCOB processes but that customers received good outcomes — fair value, genuine understanding, and effective support. The era of process-driven mortgage compliance is over.

Who It Affects

MCOB applies to firms that advise on, arrange, lend, or administer regulated mortgage contracts and home finance products. This includes mortgage lenders (banks, building societies, and specialist lenders), mortgage brokers and intermediaries, firms that administer mortgage books, and equity release providers and advisers.

The scope captures a wide range of firms. Large lenders with direct sales forces must comply with MCOB in their internal advice processes. Mortgage networks and their appointed representatives must ensure that every adviser operating under the network's permissions meets MCOB standards. Specialist lenders serving niche markets — buy-to-let (where it is regulated), shared ownership, self-build — face the same core MCOB obligations tailored to their products.

Claims management companies that handle mortgage-related complaints are also indirectly affected by MCOB, as the standards it sets determine what constitutes compliant advice and adequate disclosure.

Third-party administrators who manage mortgage books on behalf of lenders must comply with MCOB 13 in their arrears handling and with MCOB's ongoing administration requirements. The firm that outsources administration does not outsource its MCOB obligations.

What Firms Get Wrong

The most consequential failure is in advice suitability. MCOB 4.7A requires that any personal recommendation is suitable for the customer, taking into account their needs, circumstances, and preferences. Firms routinely fall short because they focus on product features rather than customer outcomes. A recommendation that secures the lowest initial rate is not necessarily suitable if the customer cannot afford the reversion rate, needs certainty of payments, or has circumstances that make a longer-term fix more appropriate.

The second common failure is inadequate affordability assessment. Despite the MMR reforms, the FCA continues to find firms that apply affordability models mechanistically without exercising judgment. A customer who narrowly passes the affordability model but has volatile income, imminent life changes, or existing financial commitments that the model does not capture may not, in reality, be able to afford the mortgage. The FCA expects firms to overlay professional judgment on model outputs.

Third, disclosure is often treated as a compliance formality rather than a consumer understanding exercise. Firms produce ESIS documents and offer documents that meet the technical requirements but are not explained to the customer in a way that ensures genuine understanding. Under Consumer Duty, the FCA now expects firms to demonstrate that customers understood the key features, risks, and costs of their mortgage — not just that they were given the paperwork.

Fourth, arrears handling under MCOB 13 remains problematic. Firms that follow a standardised collections process without individually assessing the customer's circumstances are breaching MCOB. The FCA expects tailored forbearance: understanding why the customer is in difficulty, exploring all available options, and treating repossession as a genuine last resort. The failure to signpost free money advice at an early stage is a persistent shortcoming.

Finally, record-keeping is frequently inadequate. Mortgage advice files must contain a clear record of the customer's needs and circumstances, the options considered, the rationale for the recommendation, and the customer's informed consent. Files that contain pro-forma text rather than personalised assessment evidence are vulnerable to challenge.

What Evidence the FCA Expects

The FCA expects a complete advice file for every advised mortgage sale. This must document the customer's income, expenditure, existing commitments, and future plans; the full range of products considered; the basis for the recommendation; and evidence that the recommendation was explained to and understood by the customer.

Affordability assessment records must show the inputs used (income sources, expenditure categories, stress-test rates), the methodology applied, and the result. Where professional judgment was exercised to override or supplement the model output, the rationale must be documented.

For non-advised sales, the FCA expects a clear record that the customer was told they were not receiving advice, chose to proceed without advice, and that the firm assessed whether execution-only was appropriate for the customer's circumstances.

MCOB 13 arrears records must demonstrate that the firm attempted to contact the customer, explored forbearance options, considered the customer's individual circumstances, and documented the outcome of each interaction. Progression to enforcement action should be evidenced as a last resort after alternatives were genuinely explored.

Management information should track advice quality (file review pass rates, upheld complaints), affordability outcomes (early arrears rates, payment difficulty within the first two years), and customer satisfaction. The FCA uses these metrics to assess whether MCOB obligations are being met in substance, not just in form.

Good Implementation

A well-run mortgage firm treats advice suitability as the centrepiece of its proposition. Advisers are trained to understand the customer's full financial picture — not just what they need for the mortgage application — and to make recommendations that reflect the customer's circumstances over the likely life of the product. The recommendation considers not just rate but term, product type, flexibility features, and the customer's plans for the property.

Affordability assessment combines model rigour with professional judgment. The model captures standard income and expenditure data, but advisers are trained and empowered to exercise judgment where the customer's circumstances are unusual. Borderline cases receive enhanced scrutiny, and the firm has clear policies on when to decline rather than stretch.

Disclosure is treated as a conversation, not a document delivery. Advisers walk customers through the key features and risks of their mortgage, check understanding, and document the discussion. The firm tests whether its communications are effective, using customer feedback and comprehension data to improve over time.

Arrears management is proactive and individualised. The firm contacts customers at the earliest sign of payment difficulty, explores all forbearance options, and treats each case on its merits. Staff handling arrears are trained in vulnerability identification and signpost customers to free money advice as standard practice.

Quality assurance is embedded in the advice process. File reviews are conducted on a risk-based sample, findings are fed back to advisers, and systemic issues are escalated to management for remediation. The firm uses complaint and outcome data to identify trends and drive continuous improvement.

How Our Tool Helps

The MEMA FCA calculator includes a mortgage affordability module that aligns with MCOB 4.7A and post-MMR requirements. It provides a structured framework for capturing income, expenditure, and commitment data, applying appropriate stress tests, and documenting the assessment in a format that meets FCA evidential expectations.

The tool generates affordability assessment records that form part of the advice file, ensuring that the documentation the FCA expects is produced consistently across all advisers. It flags cases where affordability is marginal, prompting enhanced assessment and professional judgment overlay.

For firms managing arrears, the tool tracks customer interactions, forbearance options explored, and outcomes achieved — producing the MCOB 13 audit trail that the FCA will request during supervisory work. MI dashboards show arrears trends, forbearance utilisation, and time-to-resolution metrics.

How Our Service Helps

Our mortgage compliance service provides independent file reviews, advice quality assessments, and MCOB compliance audits. We review advice files against MCOB suitability requirements, assess affordability assessment methodology, and evaluate disclosure practices. Our reviewers bring regulatory perspective — we assess files not just for technical compliance but for the quality of advice the FCA expects.

For firms facing FCA thematic reviews or supervisory assessments in the mortgage space, we provide targeted preparation. We understand the areas the FCA is currently focused on — mortgage prisoners, product transfers, Consumer Duty implementation, and arrears treatment — and help firms ensure their practices and evidence base meet current expectations.

We also support firms with regulatory change implementation. MCOB is updated regularly, and the interaction between MCOB and Consumer Duty continues to evolve. Our regulatory change service ensures that your firm identifies relevant changes, assesses their impact, and implements them before the compliance deadline.

Relevant Sectors

Mortgage advisers and brokers bear the most direct MCOB obligations. Every advice interaction must be suitable, every affordability assessment must be robust, and every disclosure must be effective. Firms operating through networks or appointed representative models face additional challenges in ensuring consistent MCOB compliance across their adviser population. The FCA has signalled particular concern about mortgage networks where oversight of AR quality is inadequate.

Mortgage lenders face MCOB obligations at every stage — from product design and financial promotions through to offer, completion, ongoing administration, and arrears management. Lenders with large direct sales forces must ensure MCOB compliance at scale, which requires robust training, supervision, and quality assurance frameworks. Specialist lenders serving complex customer segments — later life lending, adverse credit, self-employed borrowers — face heightened suitability obligations because the risks of unsuitable advice are greater.

Third-party mortgage administrators must comply with MCOB 13 and the broader conduct obligations that apply to ongoing mortgage management. The FCA has examined whether administrators apply the same standards of forbearance and customer treatment as the originating lender, and has found gaps. Firms that outsource mortgage administration must satisfy themselves that their administrator's MCOB compliance matches their own.

Equity release advisers operate under MCOB 9 and face some of the most stringent advice suitability requirements in the Handbook, reflecting the complexity, irreversibility, and vulnerability profile of equity release products. The FCA expects equity release advice to demonstrate comprehensive assessment of alternatives, family consultation where appropriate, and clear explanation of long-term consequences.