How much deposit is needed for a second home mortgage?

Buying a second home is often more complex than financing your first property. Lenders generally treat second homes as a higher-risk category, so the deposit you put down can be a key factor in whether you can borrow and what mortgage terms you’re offered.

This guide explains what deposit levels are commonly expected, how your deposit affects your borrowing power, and the deposit sources that are more likely to be accepted.

How much deposit do you need for a second home?

In the UK, a deposit of around 15% to 25% is a common expectation for many second home mortgages.

That range is often higher than you might see for a first property because lenders may consider factors such as:

• the additional financial commitment of owning more than one property
• the possibility of reduced affordability if rental income (if any) doesn’t cover costs
• the overall risk profile of lending against a second home

Deposit size can vary by lender

Even within the “15% to 25%” expectation, some lenders may require a higher deposit.

On the other hand, lower-deposit options can exist, but they’re usually less common and may come with tighter conditions.

What else should you factor in when buying a second home?

A deposit isn’t the only upfront cost. Second home buyers should also plan for:

• Stamp Duty Land Tax (SDLT), which can be higher for additional properties
• legal fees and survey/valuation costs
• arrangement fees (where applicable)
• potential ongoing costs such as insurance, maintenance, and utilities

Because these costs can be significant, it’s worth budgeting carefully so your deposit doesn’t stretch your finances too far.

How your deposit amount affects your mortgage pricing

Mortgage pricing is closely linked to your loan-to-value (LTV)—the percentage of the property’s value you’re borrowing.

Bigger deposit usually means lower LTV

A larger deposit reduces the amount you borrow relative to the property price. That typically improves your LTV, which can make you a more attractive borrower from a lender’s perspective.

Lower LTV can improve your options

With a better LTV position, you may have access to:

• a wider range of mortgage products
• potentially more competitive pricing
• terms that better match your circumstances

While the exact rate you receive depends on many factors (including your income, credit profile, and the property), deposit size is one of the main levers you can control.

How deposit sources can affect your mortgage

It’s not only how much deposit you have—it’s also where it comes from.

Lenders often have specific requirements about acceptable funds. They may want evidence of the money’s origin and may apply different rules depending on the source.

Deposit sources that are commonly accepted

Many lenders are more comfortable with deposits that clearly represent genuine equity or straightforward gifts.

Common examples include:

• Equity from your primary home (for instance, releasing funds via a remortgage)
• Funds from a close relative or friend as a loan or gift (subject to documentation)
• Concessionary purchase (where the purchase price is below market value and the “difference” can be treated as equity)
• Gifts from an occupier not named on the mortgage (for example, where one person is on the mortgage and another contributes to the deposit)
• Redundancy payments (where the funds can be evidenced)

Deposit sources that can be harder to use

Some deposit types are more likely to be questioned or rejected because they may be harder to evidence, may increase lender risk, or may not meet lender policy.

Examples that can be more difficult include:

• Funds that originated outside the EEA (some lenders have restrictions)
• Builders’ deposits (deposit support from developers isn’t accepted by every lender)
• Equity loans or unsecured loans (often not permitted as deposit funding)
• Cryptocurrency (mortgages secured against crypto are still uncommon, and deposit acceptance can be limited)

Because deposit source rules vary, it’s important to understand lender requirements early—especially if you’re relying on a less typical funding route.

Can you buy a second home with no deposit?

In most cases, a second home mortgage will require a deposit.

However, a no-deposit purchase may be possible using a guarantor mortgage. With this type of arrangement, another party may provide additional security or funds so the lender can take on less risk.

Guarantor mortgages are specialised products and come with their own conditions, so it’s important to consider the impact for everyone involved.

Why getting the deposit right matters for your application

Second home lending can be sensitive to both LTV and how the deposit is evidenced. Getting your deposit amount and source aligned with lender expectations can help avoid delays and reduce the risk of problems later in the process.

A careful approach typically involves:

• confirming the deposit level you’re targeting
• ensuring you can provide the required documentation for the deposit source
• checking whether your intended mortgage route matches the property and your circumstances

Second home deposits for different buyer situations

Deposit expectations can shift depending on what “second home” means in your case.

If you’re a second-time buyer

If you’re buying again after selling a previous property, deposit requirements may be different from those for people purchasing an additional property while keeping their first home. Lenders may still view these applications as higher risk than a first-time purchase, but the deposit level may not be as high as for some other second home scenarios.

If you’re buying in Ireland

Deposit requirements can differ in Ireland, and local rules may not mirror UK lender policy. If you’re considering a purchase there, it’s worth checking the deposit expectations that apply to that market.

Summary

• A 15% to 25% deposit is a common expectation for second home mortgages.
• Your deposit size affects your LTV, which can influence the mortgage options and pricing available.
• Deposit source matters: lenders often accept some sources more readily than others.
• No-deposit routes are uncommon, but may be possible via guarantor mortgages.

Understanding both the deposit level and the deposit source can make a significant difference to how smoothly your second home mortgage application progresses.