How Much Deposit Do You Actually Need for a New Build Home?
If you’re a first-time buyer eyeing up a brand-new home, the deposit is likely your biggest financial hurdle. The good news? You don’t necessarily need to save 20% of the property price – though having more will unlock better mortgage rates and lower your monthly repayments.
Most lenders will accept a 5% deposit for a new build property, though some may require 10% or 15% depending on the development and the lender’s own criteria. A handful of specialist products even offer 100% mortgages backed by a family member’s savings, though these come with their own considerations.
Here’s what you need to understand: the larger your deposit, the lower your loan-to-value (LTV) ratio, and the more competitive your mortgage deal becomes. A buyer with a 15% deposit will typically secure a significantly lower interest rate than someone with just 5%, potentially saving thousands of pounds over the mortgage term. If you’re unsure about how mortgage offers work, our guide to understanding mortgage offers for new builds explains the details.
Deposit Requirements by Property Price
The table below shows how much you’d need to save at different deposit levels for typical new build prices across the UK. These figures give you a clear savings target to work towards.
| Property Price | 5% Deposit | 10% Deposit | 15% Deposit | 20% Deposit |
|---|---|---|---|---|
| £150,000 | £7,500 | £15,000 | £22,500 | £30,000 |
| £200,000 | £10,000 | £20,000 | £30,000 | £40,000 |
| £250,000 | £12,500 | £25,000 | £37,500 | £50,000 |
| £300,000 | £15,000 | £30,000 | £45,000 | £60,000 |
| £350,000 | £17,500 | £35,000 | £52,500 | £70,000 |
| £400,000 | £20,000 | £40,000 | £60,000 | £80,000 |
| £450,000 | £22,500 | £45,000 | £67,500 | £90,000 |
Remember that new build homes can sometimes carry a pricing premium compared to older properties, so it’s worth researching typical prices for the developments you’re interested in. Many developers also offer incentives for first-time buyers that can help bridge the gap, such as contributions towards legal fees, stamp duty, or even deposit contributions.
Government-Backed Savings Schemes That Boost Your Deposit
The UK government has introduced several schemes over the years specifically designed to help first-time buyers get on the property ladder. Understanding which ones are available to you – and how to maximise them – can add thousands of pounds to your deposit fund.
Lifetime ISA (LISA)
The Lifetime ISA is currently the most powerful savings tool available to first-time buyers. You can save up to £4,000 per year, and the government adds a 25% bonus on top – that’s up to £1,000 free money every year. You must be aged 18–39 to open one, and you can keep contributing until you turn 50.
The property you buy must cost £450,000 or less, which covers the vast majority of new build homes outside prime London. You’ll need to have held the account for at least 12 months before using it, so open one as soon as possible even if you can only put in a small amount initially.
Help to Buy ISA (Legacy)
While the Help to Buy ISA closed to new applicants in November 2019, if you already have one open you can continue saving into it until November 2029. The government adds a 25% bonus (up to £3,000) when you complete on your property purchase. You can save up to £200 per month, with the property price cap set at £250,000 (or £450,000 in London).
Importantly, you cannot use both a Help to Buy ISA bonus and a Lifetime ISA bonus for the same property purchase. If you hold both, you’ll need to choose which bonus to claim. In most cases, the LISA offers better value thanks to the higher annual contribution limit. For more on the alternatives available today, see our guide to Help to Buy alternatives.
Other ISA Options
Even if you’re already maximising your LISA allowance, you can use your remaining ISA allowance (up to £20,000 total per tax year across all ISAs) in a Cash ISA or Stocks and Shares ISA for additional tax-free savings. Cash ISAs provide security and guaranteed returns, while a Stocks and Shares ISA could offer higher growth over a longer timeframe – though with the risk of your investment falling in value.
Key Savings Scheme Figures at a Glance
Source: HM Government, 2024/25 tax year
Building a Monthly Savings Plan That Works
Saving for a deposit is a marathon, not a sprint. The key to success is setting up a realistic, consistent savings plan that you can stick to month after month. Here’s how to build one that actually works.
Step 1: Set Your Target
Decide on the property price range you’re aiming for and the deposit percentage you want to achieve. A 10% deposit on a £250,000 new build is £25,000 – but don’t forget you’ll also need money for costs beyond the deposit such as solicitor’s fees, surveys, and moving costs. Adding an extra £3,000–£5,000 to your target is sensible.
Step 2: Audit Your Spending
Go through three months of bank statements and categorise every expense. You’ll likely find surprising amounts going on subscriptions, takeaways, and impulse purchases. Many first-time buyers discover they can free up £200–£500 per month just by being more intentional with their spending.
Step 3: Automate Your Savings
Set up a standing order on payday that moves your savings amount straight into your deposit fund before you have a chance to spend it. This “pay yourself first” approach is the single most effective savings habit you can adopt.
Monthly Savings Timeline
The table below shows how long it would take to save different deposit amounts based on your monthly savings rate. These projections include the LISA bonus where applicable.
| Monthly Savings | £10,000 Target | £15,000 Target | £20,000 Target | £25,000 Target | £30,000 Target |
|---|---|---|---|---|---|
| £200 per month | 3 yrs 6 mths | 5 yrs 3 mths | 7 yrs | 8 yrs 9 mths | 10 yrs 6 mths |
| £300 per month | 2 yrs 6 mths | 3 yrs 9 mths | 4 yrs 10 mths | 5 yrs 10 mths | 7 yrs |
| £400 per month | 1 yr 11 mths | 2 yrs 10 mths | 3 yrs 8 mths | 4 yrs 5 mths | 5 yrs 3 mths |
| £500 per month | 1 yr 6 mths | 2 yrs 3 mths | 2 yrs 11 mths | 3 yrs 7 mths | 4 yrs 2 mths |
| £750 per month | 1 yr 1 mth | 1 yr 6 mths | 2 yrs | 2 yrs 5 mths | 2 yrs 10 mths |
| £1,000 per month | 10 mths | 1 yr 2 mths | 1 yr 6 mths | 1 yr 10 mths | 2 yrs 2 mths |
Note: These timelines assume consistent monthly saving. The LISA bonus of up to £1,000 per year can reduce your timeline – for example, if you’re saving £333 per month into a LISA, you’ll receive an extra £1,000 each year, effectively boosting your savings rate to around £416 per month.
The Power of Small Increases
Even modest increases to your monthly savings make a big difference over time. Increasing your savings by just £50 per month could shave 6–12 months off your timeline depending on your target. Consider reviewing your savings rate every few months and increasing it whenever you get a pay rise, bonus, or manage to cut another expense.
Practical Strategies to Supercharge Your Savings
Beyond the basics of “spend less, save more,” there are several proven strategies that can help you build your deposit fund faster. Here are the most effective approaches used by successful first-time buyers across the UK.
Employer Savings Schemes
Some employers offer savings-related benefits that can boost your deposit fund. Check whether your workplace offers any of the following:
- Salary sacrifice schemes: Some employers allow you to redirect a portion of your pre-tax salary into a savings account, giving you a small tax advantage
- Employer-matched savings: A growing number of companies offer to match employee savings up to a certain amount – essentially free money towards your deposit
- Season ticket loans: While not directly a savings tool, an interest-free loan for your commute frees up cash you can redirect to savings
- Cycle to work schemes: Similarly, reducing transport costs through these schemes means more money available for your deposit fund
- Workplace ISA contributions: Some employers will contribute directly to your ISA as part of a benefits package
The Side Hustle Approach
Many first-time buyers accelerate their savings by taking on additional income alongside their main employment. Popular options include freelancing, tutoring, selling handmade goods online, renting out a spare room if you own or have landlord permission, or taking on weekend work. Even an extra £200–£400 per month from a side hustle can dramatically reduce your savings timeline.
The Savings Challenge Method
Gamifying your savings can make the process more engaging and effective. Popular approaches include:
- The 1p challenge: Save 1p on day one, 2p on day two, 3p on day three, and so on. By day 365, you’ll have saved £667.95 in a year
- The 52-week challenge: Save £1 in week one, £2 in week two, and so on. By the end of the year, you’ll have saved £1,378
- Round-up savings: Many banking apps now offer automatic round-ups, saving the spare change from every transaction. Over a year, this typically adds £300–£600 to your pot
- No-spend days or weeks: Challenge yourself to spend nothing except on essentials for set periods, banking the money you would have spent
Investing for Growth
If your savings timeline is five years or more, you might consider investing a portion of your deposit fund in a Stocks and Shares ISA or index tracker fund. Historically, the stock market has delivered higher returns than cash savings over longer periods. However, this approach carries risk – your investment could fall in value, so only consider this if you have a longer timeframe and are comfortable with some level of risk. For shorter timelines, a high-interest cash savings account is the safer choice.
Family Gifting Rules and Parental Support
It’s increasingly common for family members – particularly parents and grandparents – to help first-time buyers with their deposit. In fact, research suggests that around a third of first-time buyers receive some form of family financial help. If you’re fortunate enough to have family who can contribute, here’s what you need to know about parents helping you buy a new build.
Gifted Deposits
Mortgage lenders will accept gifted deposits, but they require a gifted deposit letter from the person providing the money. This letter must confirm:
- The amount being gifted
- The relationship between the giver and the buyer
- That the money is a genuine gift, not a loan
- That the giver has no expectation of repayment
- That the giver will have no interest or stake in the property
The lender will also require proof of the source of the gifted funds as part of their anti-money-laundering checks. Your family member may need to provide bank statements showing where the money came from.
Tax Implications of Gifted Deposits
There is no tax payable on receiving a gift in the UK – there is no gift tax. However, if the person giving the gift passes away within seven years, the gift may be counted as part of their estate for inheritance tax purposes. This only becomes relevant if their estate exceeds the inheritance tax threshold (currently £325,000, or £500,000 including the residence nil-rate band). For most families, this isn’t a concern, but it’s worth being aware of.
Other Family Support Options
Beyond outright gifts, families can help in other ways:
- Guarantor mortgages: A parent or family member guarantees the mortgage, often using their own property or savings as security. This can help you borrow more or access better rates
- Family springboard mortgages: The family member deposits a sum (typically 10% of the property value) into a linked savings account for a fixed period. If all payments are made on time, they get their money back with interest
- Concessionary purchases: If buying from a family member, some lenders allow the property to be sold at below market value, with the discount counting as your deposit
- Living rent-free: Perhaps the simplest form of help – living with family while you save can dramatically accelerate your timeline by eliminating your biggest monthly expense
Cutting Costs: Where to Find Extra Money Each Month
Every pound you save is a pound closer to your new build home. Here are the most effective areas where first-time buyers typically find savings, along with realistic figures for how much you could free up. Once you’ve saved enough, you’ll want to understand the full new build buying process from start to finish.
Housing Costs
If you’re currently renting, your rent is likely your biggest expense. While you may not be able to eliminate it entirely, consider whether you could:
- Move to a cheaper area or a smaller property temporarily (£100–£300 per month saving)
- Take on a flatmate to share costs (£200–£500 per month saving)
- Move back in with family if possible (£500–£1,200 per month saving)
- Negotiate a rent reduction with your landlord, especially if you’re a reliable tenant
Everyday Spending
Small changes in daily spending habits can add up to significant savings over months and years:
- Food shopping: Meal planning, cooking in batches, switching to budget supermarkets (£50–£150 per month saving)
- Coffee and lunches: Making your own rather than buying (£40–£100 per month saving)
- Subscriptions: Audit all recurring payments and cancel unused services (£20–£80 per month saving)
- Entertainment: Opt for free activities, home cinema nights, library books (£30–£100 per month saving)
- Transport: Walk, cycle, or use public transport instead of driving where possible (£50–£200 per month saving)
Bills and Utilities
Switching providers and negotiating bills is one of the easiest ways to free up extra cash:
- Energy: Use comparison sites to find the best tariff (£10–£40 per month saving)
- Mobile phone: Switch to a SIM-only deal (£15–£35 per month saving)
- Broadband: Haggle with your provider or switch at contract end (£10–£25 per month saving)
- Insurance: Compare car, contents, and travel insurance annually (£10–£50 per month saving)
- Council tax: Check you’re in the correct band and apply for single person discount if eligible (up to £30 per month saving)
When you finally move into your new home, the good news is that new builds are significantly more energy-efficient than older properties, which means lower running costs. Our guide to new build EPC ratings explains how this works. Meanwhile, you’ll want to plan your furnishing budget carefully to avoid overspending after completion.
| Cost-Cutting Area | Potential Monthly Saving | Annual Saving | Difficulty |
|---|---|---|---|
| Move to cheaper accommodation | £100–£500 | £1,200–£6,000 | Medium |
| Reduce food spending | £50–£150 | £600–£1,800 | Easy |
| Cancel unused subscriptions | £20–£80 | £240–£960 | Easy |
| Switch energy and broadband | £20–£65 | £240–£780 | Easy |
| Reduce transport costs | £50–£200 | £600–£2,400 | Medium |
| Cut entertainment spending | £30–£100 | £360–£1,200 | Easy |
| Side hustle income | £200–£500 | £2,400–£6,000 | Hard |
Common Deposit Saving Mistakes to Avoid
Even the most determined savers can fall into traps that slow their progress or create problems when it comes time to apply for a mortgage. Here are the pitfalls to watch out for.
Not Starting Soon Enough
The most common regret among first-time buyers is not starting to save sooner. Even if buying feels years away, opening a LISA and putting in even £50 a month gets the 12-month clock ticking and starts building your pot. Time is your greatest asset when saving for a deposit. Planning early also helps you understand the full first-time buyer timeline.
Ignoring Your Credit Score
While you’re busy saving, don’t forget about your credit score. A poor credit score can mean being rejected for a mortgage or offered much higher interest rates, even if you have a healthy deposit. Check your score regularly and take steps to improve it well before you plan to apply.
Saving in the Wrong Account
Keeping your deposit savings in a standard current account earning 0.01% interest is essentially losing money to inflation. At minimum, use a high-interest savings account. Ideally, maximise your LISA allowance first for the 25% bonus, then use a competitive savings account for the rest.
Not Budgeting for Additional Costs
Your deposit is just one part of the financial picture. Many first-time buyers are caught off guard by the additional costs of buying, which can add £3,000–£8,000 to the total. These include solicitor and conveyancing fees, mortgage arrangement fees, valuation and survey costs, removal costs, and initial furniture and household items. First-time buyers purchasing properties under £425,000 benefit from stamp duty relief, which is one less cost to worry about.
Dipping into Your Deposit Fund
It can be tempting to “borrow” from your deposit savings for holidays, unexpected expenses, or treats. To avoid this, keep your deposit fund in a separate account – ideally one that’s not instantly accessible (like a notice account or LISA, where withdrawal penalties discourage impulsive spending).
Lifestyle Inflation
When you get a pay rise or bonus, it’s natural to increase your spending. Fight this urge by immediately redirecting at least half of any income increase into your deposit fund. This way, you still enjoy a slight improvement in lifestyle while significantly boosting your savings rate.
Frequently Asked Questions
Can I buy a new build with just a 5% deposit?
Yes, many lenders offer 95% mortgages for new build properties. However, availability can vary depending on the lender and the specific development. Some lenders may require a higher deposit for new builds – typically 10% or 15% – due to the perceived risk of new build valuations. It’s worth speaking to a mortgage broker who specialises in new builds to find the best options. You may also benefit from developer incentives that can help reduce your upfront costs.
How long does it typically take first-time buyers to save a deposit?
According to recent research, the average first-time buyer in the UK takes approximately 5–7 years to save a deposit, though this varies enormously depending on location, income, and living costs. Buyers in the North of England or Scotland may save their deposit in 3–4 years, while those in London and the South East could take 8–10 years or more without family help. Using government schemes like the LISA and being disciplined with spending can significantly reduce this timeline.
Should I save a bigger deposit or buy sooner with a smaller one?
This depends on your personal circumstances and the property market conditions. Buying sooner with a smaller deposit means you start building equity and stop paying rent, but you’ll pay a higher interest rate. Saving longer for a larger deposit means better mortgage deals and lower monthly payments, but you’re still paying rent and property prices may rise in the meantime. As a general rule, aiming for at least 10% is a good balance between speed and securing a competitive mortgage rate.
Can I use a Lifetime ISA and a Help to Buy ISA together?
You can hold both accounts, but you can only use the government bonus from one of them for the same property purchase. Since the LISA allows higher annual contributions (£4,000 vs £2,400) and has a more generous structure, most people choose to claim the LISA bonus. You can still withdraw the savings (without the bonus) from your Help to Buy ISA and use those funds towards your purchase.
Do I need to prove where my deposit comes from?
Yes, absolutely. Under anti-money-laundering regulations, both your mortgage lender and your solicitor will need to verify the source of your deposit funds. You’ll typically need to provide bank statements showing regular savings, proof of any gifts (gifted deposit letters), documentation for any windfalls (inheritance, redundancy payments, etc.), and evidence of investment returns. Keep clear records from the start of your savings journey to make this process as smooth as possible. This is all part of the wider buyer paperwork checklist.
Start Your Deposit Journey Today
Saving for a new build deposit is undoubtedly one of the biggest financial challenges you’ll face as a first-time buyer, but it’s far from impossible. By combining government-backed savings schemes like the Lifetime ISA, disciplined monthly saving habits, smart cost-cutting strategies, and potentially family support, thousands of first-time buyers across the UK successfully save their deposit every year.
The most important step is simply to start. Open a Lifetime ISA today, set up your standing order, and begin your journey towards homeownership. Every pound you save brings you closer to the front door of your new build home. When you’re ready to take the next step, explore our guides on the new build reservation process and buying a new build home in the UK to prepare for what comes next.
Remember: the earlier you start, the more time your money has to grow, and the sooner you’ll be stepping into your very own new build home.