Mortgage Myths: Mortgages are governed by detailed lending criteria, yet simple myths often shape borrowers’ expectations.

One person may secure a mortgage with a 5% deposit. Another may need a larger deposit despite earning more.

A borrower with an old default may be accepted. Someone with no missed payments could still fail an affordability assessment.

These outcomes are not contradictions. They reflect differences between borrowers, properties, products and lender policies.

This guide tests common mortgage myths against current UK lending data and practical application requirements.

Common Mortgage Myths Explained

• Poor credit does not automatically prevent a mortgage.
• A 10% deposit is not required for every application.
• Income multiples do not determine affordability by themselves.
• Existing debts and household costs can reduce borrowing.
• An Agreement in Principle does not guarantee a mortgage offer.
• Self-employed applicants do not always need three years of accounts.
• The lowest advertised rate is not always the lowest overall cost.
• Changing jobs does not automatically prevent an application.
• A mortgage should usually be reviewed before the existing deal ends.

Every mortgage decision depends on the lender’s criteria and the applicant’s full circumstances.

Mortgage Myths at a Glance

Myth 1: You Cannot Get a Mortgage With Bad Credit

Verdict: Poor credit can restrict your options, but it does not automatically prevent a mortgage.

Lenders do not assess every credit issue in the same way.

They may consider:

• The type of credit problem.
• How much money was involved.
• When the event occurred.
• Whether the debt has been settled.
• Your payment record since the event.
• Your current debts.
• Your available deposit.
• The required loan-to-value ratio.

A missed mobile phone payment may receive different treatment from a recent mortgage arrear or County Court Judgement.

Some lenders use automated credit scoring. Others assess adverse credit cases using more detailed underwriting.

However, a specialist lender is not automatically suitable. Rates, fees and deposit requirements may differ from mainstream products.

Before applying, review your credit records and check whether the information is accurate. Our adverse credit mortgage guide explains how different credit events may affect an application.

For further preparation, Connect Lifetime’s guide to getting mortgage ready covers credit records, documents and early checks.

Myth 2: Every Buyer Needs at Least a 10% Deposit

Verdict: Some buyers may qualify with a 5% deposit, subject to lender and product criteria.

A 5% deposit normally means borrowing at 95% loan-to-value.

Loan-to-value compares the mortgage with the property’s purchase price or accepted valuation.

For example:

• Property price: £250,000
• Buyer’s deposit: £12,500
• Mortgage required: £237,500
• Loan-to-value: 95%

The permanent Mortgage Guarantee Scheme supports participating lenders offering eligible mortgages between 91% and 95% loan-to-value.

The scheme does not guarantee approval for the borrower.

Applicants must still satisfy the lender’s:

• Affordability assessment.
• Credit requirements.
• Income rules.
• Property criteria.
• Deposit requirements.
• Mortgage term limits.

A larger deposit can reduce the loan-to-value ratio. It may also provide access to a wider product range.

However, buyers should retain enough money for legal fees, surveys, moving costs and possible repairs.

Read our first-time buyer mortgage guide for a fuller explanation of deposits and buying costs.

Myth 3: Mortgage Borrowing Is Simply Four Times Your Salary

Verdict: Income multiples can provide an initial indication, but they do not determine the final result.

Lenders calculate affordability using more than gross annual income.

They may review:

• Basic salary.
• Overtime and bonuses.
• Commission.
• Self-employed income.
• Credit card balances.
• Personal loans.
• Car finance.
• Childcare costs.
• Student loan deductions.
• Maintenance commitments.
• Dependants.
• Regular household spending.
• Mortgage term.
• Expected monthly payments.

UK Finance’s Q1 2026 England data reported an average first-time buyer loan-to-income ratio of 3.64.

That is a market average, not a lending limit for every borrower.

Two households earning the same amount can receive different decisions because their commitments are different.

FCA lending rules require affordability assessments to consider income and expenditure. Relevant future payment pressures may also need consideration.

Use the residential affordability calculator for an initial estimate. A calculator cannot provide a mortgage decision or guarantee a particular loan.

Connect Lifetime also explains how mortgage affordability is affected by spending, debts and lender criteria.

Myth 4: Existing Debts Do Not Matter if Payments Are Up to Date

Verdict: Well-managed debts can still reduce the amount a lender considers affordable.

A lender is not only checking whether payments have been missed.

It is also measuring how much income remains after existing commitments are paid.

Credit cards, loans and car finance may reduce disposable income. They can therefore reduce the available mortgage amount.

A lender may consider:

• The outstanding balance.
• The required monthly payment.
• The remaining finance term.
• Whether the debt will be repaid before completion.
• Whether new borrowing has recently been taken.
• How the commitment affects monthly affordability.

Clearing a debt before applying does not always increase borrowing pound for pound. Using savings to clear debt may also reduce the deposit.

The correct decision depends on the interest cost, monthly payment, deposit position and lender calculation.

Myth 5: An Agreement in Principle Guarantees the Mortgage

Verdict: An Agreement in Principle is an early assessment, not a mortgage offer.

An Agreement in Principle may also be called a Decision in Principle or Mortgage in Principle.

It usually estimates how much a lender might consider, based on limited initial information.

Depending on the lender, this stage may involve a soft or hard credit search.

The full application can still be affected by:

• Verified income documents.
• Bank statements.
• Undeclared debts.
• Changes in circumstances.
• The property valuation.
• Property construction.
• Lease terms.
• Source of deposit.
• Fraud and identity checks.
• Detailed underwriting.

An Agreement in Principle can help establish a working budget. However, buyers should avoid treating it as final approval.

The property must also be acceptable security for the lender.

Myth 6: Self-Employed Applicants Always Need Three Years of Accounts

Verdict: Some lenders consider shorter trading histories, although requirements vary.

Lenders may use different evidence depending on the applicant’s business structure.

A sole trader may need:

• Tax calculations.
• Tax year overviews.
• Business bank statements.
• Finalised accounts.

A limited company director may be assessed using:

• Salary and dividends.
• Salary and retained profit.
• Company accounts.
• Business performance.
• Shareholding percentage.

Some lenders consider applicants with one year of trading. Others require two or more completed years.

Income stability, the business sector and recent performance can also affect the decision.

Our self-employed mortgage guide explains the evidence lenders may request.

Myth 7: The Lowest Mortgage Rate Is Always the Cheapest Deal

Verdict: The interest rate is important, but it is only one part of the total cost.

A mortgage with a lower rate may include a higher product fee.

Another product may have a higher rate but no fee, free valuation or cashback.

A meaningful comparison should consider:

• Monthly payments.
• Product fees.
• Valuation fees.
• Legal costs.
• Cashback.
• Early repayment charges.
• The initial product period.
• The follow-on rate.
• The repayment method.
• The expected mortgage balance.

For a smaller mortgage, a large product fee can outweigh a modest rate saving.

For a larger mortgage, the lower rate may produce greater savings.

The comparison period must also be consistent. Comparing one product over two years with another over five years can mislead.

Use the quick mortgage calculator to compare estimated monthly payments at different rates.

Myth 8: There Is No Point Reviewing Mortgages Before Finding a Property

Verdict: Early preparation can expose affordability or documentation problems before an offer is made.

A buyer does not need to select a mortgage product months before purchasing.

However, an early review can help establish:

• A realistic property budget.
• A possible deposit requirement.
• Which income evidence may be needed.
• Whether credit records contain errors.
• Whether existing commitments affect borrowing.
• Whether the required property type may present difficulties.

Mortgage products can change before the buyer finds a property. Therefore, an early discussion should focus on preparation rather than promising a particular rate.

A buyer should also avoid repeated speculative applications. Several unnecessary hard credit searches may complicate later underwriting.

Myth 9: A Mortgage Decline Means Every Lender Will Say No

Verdict: A decline explains one lender’s decision at one point in time.

A lender may decline an application because of:

• Credit scoring.
• Affordability.
• Income evidence.
• Employment history.
• Property type.
• Lease terms.
• Deposit source.
• Loan size.
• Internal exposure limits.
• Undisclosed information.

Submitting the same application elsewhere without understanding the reason can create further problems.

The better approach is to identify the likely cause and check which lender criteria may differ.

However, another application should only be made when there is a credible basis for doing so.

Myth 10: You Must Wait Until Your Fixed Rate Ends

Verdict: Many borrowers can review their position several months before the current deal expires.

The available timing depends on the existing lender, new lender and mortgage product.

Reviewing early can provide time to:

• Check the current mortgage balance.
• Review early repayment charges.
• Compare a product transfer with remortgaging.
• Prepare income documents.
• Resolve credit record errors.
• Consider changes in property value.
• Assess fees and legal requirements.

A new deal should not be selected only because rates might rise or fall.

The decision should reflect affordability, fees, future plans and the cost of changing the mortgage.

Our remortgage guide explains the main stages and considerations.

What Current Mortgage Data Really Shows

UK Finance’s Q1 2026 England factsheet reported 74,840 first-time buyer loans.

The average first-time buyer loan was £227,091. The average loan-to-value ratio was 77.7%.

It also reported an average loan-to-income ratio of 3.64 and a payment-to-income ratio of 22.1%.

These averages do not define what one person can borrow.

They show that mortgage lending is based on connected variables rather than one universal rule.

A lender’s decision combines the borrower, the property, the product and the timing.

That is why mortgage myths remain persuasive. A simple rule feels certain, while lending criteria are conditional.

The practical lesson is not to ignore general guidance. It is to understand where general guidance stops being personal evidence.

Making Decisions From Evidence, Not Mortgage Myths

A mortgage myth usually begins with something that was true for one borrower, lender or market period.

The mistake is turning that individual outcome into a universal rule.

Mortgage criteria change. Products change. Personal circumstances also differ.

Before applying, check your credit information, affordability, deposit, documents and expected property type.

Evidence cannot guarantee acceptance. However, it can replace guesswork with a more realistic assessment.

Connect Mortgages is a credit broker, not a lender. Mortgage availability remains subject to status, affordability and lender criteria.

Frequently Asked Questions About Mortgage Myths

Can I get a mortgage with a 5% deposit?

Some lenders offer 95% loan-to-value mortgages. Approval depends on affordability, credit history, income, property criteria and product availability.

Does checking my credit report harm my credit score?

Accessing your own statutory credit report does not normally reduce your score. A lender’s hard credit search may be recorded.

Does an Agreement in Principle guarantee a mortgage?

No. The lender must still verify the application, complete underwriting and confirm that the property is acceptable.

Can I get a mortgage after changing jobs?

Possibly. Lenders may consider your contract, start date, probation period, employment history and income structure.

Must I clear every debt before applying?

No. The effect depends on the balance, monthly payment, available deposit and lender affordability calculation.

Are mortgage calculators accurate?

They provide estimates based on the information entered. They do not include every lender rule and cannot guarantee approval.

Your home may be repossessed if you do not keep up repayments on your mortgage.