100% Mortgage Guide: How No Deposit Mortgages Work – A 100% mortgage is not a shortcut around affordability. It is a different way of measuring risk.

Instead of asking how much deposit you have saved, the lender looks closely at income, credit history, monthly commitments, property type and long-term repayment strength. That makes the product technical as well as practical.

A 100% mortgage may help some buyers purchase a home without a cash deposit. However, it also means borrowing the full property value. That can increase risk if property prices fall or if your circumstances change.

This guide explains how a 100% mortgage works, who may qualify, what checks apply, and what risks you should consider before applying.

At a Glance

A 100% mortgage lets you borrow the full purchase price of a property without paying a deposit.

It may suit buyers with stable income, clean credit and strong affordability who have struggled to save while paying rent. It does not mean buying a home with no costs at all. You may still need money for legal fees, surveys, moving costs, insurance and Stamp Duty, where applicable.

A 100% mortgage can be useful for the right buyer. However, it needs careful advice because the risks are higher than with a lower loan-to-value mortgage.

What is a 100% Mortgage?

A 100% mortgage is a mortgage where the loan equals the full purchase price of the property.

For example, if the property costs £250,000, a 100% mortgage would mean borrowing £250,000. This is also called a 100% loan-to-value mortgage, or 100% LTV mortgage.

Most mortgages require a deposit. A 95% mortgage usually needs a 5% deposit. A 90% mortgage usually needs a 10% deposit. With a 100% mortgage, the lender takes more risk because there is no deposit buffer.

That is why lender checks are usually strict.

A lender may assess:

• Your income
• Your household spending
• Your credit history
• Your existing debts
• Your employment stability
• The property type
• The purchase price
• Your future repayment ability
• Whether the mortgage remains affordable over time

The key point is simple. A 100% mortgage removes the deposit hurdle, but it does not remove lender scrutiny.

How Does a 100% Mortgage Work in Practice?

A 100% mortgage works like a standard residential mortgage in many ways. You borrow money from a lender, buy a property, and repay the mortgage over an agreed term.

The difference is the deposit position.

With a standard mortgage, part of the purchase comes from your savings. With a 100% mortgage, the whole purchase price is funded by the mortgage.

That means the lender may place more weight on affordability, credit strength and product rules.

Some no-deposit mortgages use a guarantor or family support. Others may use a rental payment history, savings arrangement or a specialist lender structure.

April Mortgages offers a no-deposit mortgage option for eligible borrowers. You can read more about the lender route on the April Mortgages no-deposit and long-term fixed mortgage page.

Why 100% Mortgages Exist

Many buyers can afford a monthly mortgage payment but struggle to build a deposit.

Rent, household bills and everyday costs can make saving difficult. For some buyers, the issue is not whether they can manage a mortgage. The issue is whether they can save enough while already paying high housing costs.

That is the gap a 100% mortgage tries to address.

However, home ownership should not be rushed. A mortgage is not only a way into a property. It is a long-term financial commitment that must remain manageable when life changes.

That is where advice matters.

Who May a 100% Mortgage Suit?

A 100% mortgage may suit some buyers who have strong affordability but limited savings.

It may be relevant if:

• You have a stable income
• You have a clean or strong credit history
• You can evidence your income clearly
• You can afford the monthly repayments
• You have struggled to save a deposit while renting
• You plan to stay in the property for a reasonable period
• You understand the risk of negative equity
• You have enough money for buying costs

It may be less suitable if:

• Your income changes often
• You expect to move again soon
• Your credit file needs repair
• Your monthly budget is already stretched
• You need a property type the lender will not accept
• You may need to remortgage quickly
• You have little room for future cost increases

A 100% mortgage should not be judged only by whether you can get approved. It should be judged by whether it remains sensible after approval.

What Criteria May Apply?

Criteria vary by lender and can change. Therefore, you should always check current rules before applying.

For a 100% mortgage, lenders may consider:

• Minimum household income
• Age at application
• Age at the end of the mortgage term
• UK residency
• Credit history
• Employment type
• Property value
• Property type
• Whether the property is your main home
• Whether the purchase is a house or flat
• Whether the property is a new build
• Loan size limits
• Affordability under lender stress tests

Some lenders may exclude flats, new builds or certain property types. Others may require evidence of rent payments or specific income patterns.

If you are buying your first home, the wider first-time buyer mortgage guide may help you understand the wider buying process.

What Costs Still Apply With a 100% Mortgage?

A no-deposit mortgage does not mean a no-cost home purchase.

You may still need to budget for:

• Solicitor or conveyancing fees
• Search fees
• Survey costs
• Mortgage product fees, if charged
• Valuation fees, where applicable
• Buildings insurance
• Moving costs
• Broker fees, if charged
• Furniture and essential repairs
• Stamp Duty, where applicable

This point is often missed. The deposit may be zero, but the buying process still has real costs.

You can estimate possible property tax costs with the Stamp Duty Calculator.

Why Loan-to-Value Matters

Loan-to-value compares the mortgage amount with the property value.

If you buy a £250,000 property with a £250,000 mortgage, your LTV is 100%.

If you buy the same property with a £25,000 deposit, your mortgage is £225,000. Your LTV is 90%.

A lower LTV usually gives the lender more security. It may also give the borrower access to more product options. That is why 100% mortgages can have tighter criteria or higher rates than lower-LTV products.

Over time, your LTV may improve if you repay the mortgage or if the property value rises. However, property values can also fall. Therefore, future equity should never be assumed.

What Is Negative Equity?

Negative equity happens when your mortgage is higher than your property value.

For example, if you owe £250,000 but your home is worth £240,000, you are in negative equity.

This risk matters more with a 100% mortgage because you start without a deposit buffer. If property prices fall soon after purchase, there may be little or no equity to absorb the fall.

Negative equity can make it harder to:

• Sell the property
• Move home
• Remortgage to another lender
• Access better rates
• Clear the mortgage from sale proceeds

This does not mean a 100% mortgage is wrong. It means the decision needs a longer-term view.

The practical question is not only “Can I buy now?” It is also “Could I cope if the property value falls?”

How Affordability Is Assessed

Affordability is central to every mortgage application.

For a 100% mortgage, the lender may review your income and outgoings in detail. They need to understand whether the mortgage is affordable now and whether it could remain affordable in less favourable conditions.

They may look at:

• Basic salary
• Overtime
• Bonuses
• Commission
• Self-employed income
• Childcare costs
• Loans
• Credit cards
• Car finance
• Student loans
• Dependants
• Bank statements
• Regular subscriptions
• Existing rent
• Future household bills

A buyer with no deposit still needs financial resilience. This is because owning a home brings costs that renting may not include.

You can start with the Residential Affordability Calculator to get an initial idea of borrowing potential.

100% Mortgage vs 95% Mortgage

A 95% mortgage needs a 5% deposit. A 100% mortgage does not need a deposit.

That difference may sound small, but it can change the risk profile.

A 95% mortgage gives the lender a small equity buffer from day one. It may also give the borrower access to a wider choice of products.

A 100% mortgage may help buyers move sooner. However, the borrower starts with no equity unless the property value rises or the mortgage balance falls.

Here is the practical comparison:

The better option depends on your circumstances. Saving a 5% deposit may lead to more choice. However, waiting may also mean more time paying rent.

That is why the decision should be assessed properly.

What Documents Might You Need?

Before speaking to an adviser, it helps to prepare your documents.

You may need:

• Proof of identity
• Proof of address
• Recent payslips
• P60, where relevant
• Bank statements
• Proof of deposit, if any
• Credit commitments
• Evidence of rent payments, where relevant
• Self-employed accounts or tax documents
• Details of bonuses or commission
• Proof of gifted funds, if applicable

Good preparation can reduce delays. It can also help your adviser check whether the case is likely to fit lender criteria.

Common Mistakes to Avoid

A 100% mortgage needs clear thinking. The biggest mistakes often happen before the application starts.

Avoid these errors:

• Assuming no deposit means no savings are needed
• Ignoring legal, survey and moving costs
• Focusing only on the rate
• Choosing a property before checking criteria
• Forgetting the risk of negative equity
• Applying before reviewing your credit file
• Stretching affordability too tightly
• Assuming every lender accepts every property type
• Thinking approval is guaranteed
• Comparing products without looking at long-term risk

A mortgage should help you move forward, not leave you financially exposed.

Should You Use a Mortgage Adviser?

A 100% mortgage can be more technical than a standard mortgage.

The adviser’s role is to check whether the product fits your circumstances, not only whether it exists. That means looking at income, credit profile, property type, repayment plans and future risks.

A mortgage adviser can help you understand:

• Whether you may meet lender criteria
• What property restrictions may apply
• Whether your income is suitable
• How your credit file may affect the application
• What costs you need to budget for
• Whether a lower-LTV option could be better
• What the risks mean in practical terms

If you prefer to compare advisers by location, language or adviser profile, you can use the Connect Experts 100% mortgage guide. Connect Experts is part of the Connect Group and helps users find mortgage advisers.

Is a 100% Mortgage a Good Idea?

A 100% mortgage can be a good idea for some buyers, but not for everyone.

It may work when the buyer has high income, stable circumstances, clear documents, good credit and enough money for buying costs. It may also work where the buyer plans to stay in the property long enough to reduce risk.

It may not work where the buyer is stretching too far, has unstable income, expects to move soon or has no savings after completion.

The question is not whether 100% mortgages are good or bad. The better question is whether the structure fits the person, the property and the plan.

A home is not only a purchase. It is a commitment to future payments, maintenance, and choices.

FAQs: 100% Mortgages

Can I get a mortgage with no deposit?

You may be able to get a mortgage with no deposit if you meet lender criteria. This is known as a 100% mortgage or 100% LTV mortgage. Approval depends on income, affordability, credit history, property type and lender rules.

Does a 100% mortgage mean I need no money at all?

No. You may not need a deposit, but you may still need money for legal fees, searches, surveys, moving costs, insurance and Stamp Duty where applicable.

Are 100% mortgages only for first-time buyers?

Not always. Some products may be aimed at first-time buyers, while others may consider certain home movers or eligible residential buyers. Criteria vary by lender.

Do I need a guarantor for a 100% mortgage?

Some 100% mortgages may require a guarantor or family support. Others may not. The structure depends on the lender and product.

What is the biggest risk of a 100% mortgage?

The biggest risk is negative equity. This can happen if your property value falls below the mortgage balance. It may make selling or remortgaging harder.

Can I remortgage after taking a 100% mortgage?

You may be able to remortgage later, but your options depend on your property value, mortgage balance, credit profile and lender criteria at that time. Early repayment charges may also apply on some products.

Is a 100% mortgage cheaper than renting?

Not always. Monthly mortgage payments may be lower or higher than rent, depending on the product, rate, property price and term. You should also consider ownership costs, insurance, repairs and maintenance.

Can bad credit stop me getting a 100% mortgage?

Yes, poor credit can reduce your chances. Lenders offering 100% mortgages often require a strong credit profile because the loan carries higher risk.

What property types are accepted?

Accepted property types depend on lender rules. Some no-deposit products may exclude flats, new builds or unusual construction types. Always check before making an offer.

Should I wait and save a deposit instead?

Possibly. Saving a deposit may give you more mortgage choice and reduce negative equity risk. However, waiting may mean staying in rented accommodation longer. Advice can help you compare both routes.