First-Time Buyers in Peterborough: How Much Deposit Do You Actually Need?

You decide you're going to buy your first home.

Excellent.

Then somebody tells you that you need a 10% deposit.

Someone else says 5%.

Your parents remember needing something completely different.

And you've seen a mortgage advertised with an even smaller deposit.

So how much do you actually need?

For a Peterborough first-time buyer, we can put some useful numbers against it.

The average price paid by first-time buyers in Peterborough was £209,000 in June 2026.

On a home at that price, your deposit would look like this:

5% — £10,450

10% — £20,900

15% — £31,350

20% — £41,800

Suddenly, “you need a deposit” becomes a much more helpful conversation.

You Don't Automatically Need 10%

MoneyHelper says buyers will usually need a deposit of at least 5% to 10% of the price of the home.

The bigger the deposit, the less you need to borrow. It can also give you access to more mortgage deals and, in many cases, lower interest rates.

But 10% isn't a rule saying you're not allowed to buy until you reach it.

There are 95% loan-to-value mortgages available, meaning you provide a 5% deposit and borrow the remaining 95%.

The government's permanent Mortgage Guarantee Scheme is also designed to support the availability of mortgages at 91% to 95% LTV through participating lenders.

That doesn't mean everyone with 5% saved will qualify.

Your income, debts, regular spending, credit history, employment and the property itself can all affect what a lender is prepared to offer.

But it does mean that “I haven't saved 10% yet” doesn't automatically equal “I can't buy yet.”

The Peterborough Difference Between 5% and 10% Is £10,450

This is the number I'd concentrate on.

Take that £209,000 first-time buyer average.

With 5% saved, you need:

£10,450

To reach 10%, you need:

£20,900

So the gap is another:

£10,450

That's the decision to investigate.

Not:

“Is 5% or 10% better?”

Clearly, borrowing less has advantages.

The useful question is:

“What would another £10,450 change for me?”

Would it unlock a noticeably better mortgage rate?

How much would it reduce your monthly payment?

How long would it take you to save?

What happens to house prices during that period?

And, if you're renting, what are your housing costs while you wait?

You need the actual figures before deciding.

Don't Let the Average House Price Choose Your Deposit

There's another Peterborough figure to keep in mind.

The average price across all homes in the city was £238,000 in June 2026.

At £238,000:

5% = £11,900

10% = £23,800

But perhaps you're not looking at £238,000 homes.

Maybe the houses or flats you'd seriously consider are around £180,000.

Now 5% is £9,000.

Perhaps you're looking closer to £250,000.

Now it's £12,500.

That's why citywide averages only get you so far.

Open the property websites and look at homes you'd actually consider buying.

Not the dream house you'd buy after winning the lottery.

Not the cheapest property in Peterborough because technically it exists.

Your realistic shortlist.

Then calculate 5% and 10% from those prices.

That's your deposit range.

Your Deposit Isn't Your Entire House-Buying Fund

This catches people out.

Suppose you've saved £12,000 and found a property where a £12,000 deposit works.

Great.

But you don't necessarily want to hand over every penny you've got and arrive at completion with £4.73 left in the bank.

Buying a home comes with other costs.

MoneyHelper lists expenses including solicitor or conveyancer fees, surveys, mortgage fees, insurance and moving costs.

 It says buying and moving fees can potentially exceed £5,000, although the amount varies considerably.

And then you get the keys.

That's when the house begins really introducing itself.

“Hello. The previous owners have taken all the curtain poles.”

“Hello again. Have you seen how much a sofa costs?”

Then the washing machine joins in.

You need some money left.

A Bigger Deposit Isn't Much Help If It Leaves You With Nothing

Imagine you've saved £22,000.

You're looking at a £209,000 property.

Technically, you could put almost all of that towards a deposit.

But should you?

That's a different question.

You still need to cover the buying costs.

And having some money available after moving can stop the first unexpected repair going straight onto a credit card.

Your mortgage also needs to work alongside:

Council Tax.

Energy.

Water.

Insurance.

Food.

Travel.

Car costs.

Childcare, if you have it.

And everything else you currently spend money on.

Getting the mortgage approved isn't the finish line.

You need to be able to live with the payment afterwards.

So Should You Buy With 5% or Wait for 10%?

Don't decide this from an article.

Get the two scenarios priced.

For the Peterborough first-time buyer example, ask a regulated mortgage adviser or lender to show you what buying a £209,000 property might look like with:

£10,450 down — 95% LTV

versus:

£20,900 down — 90% LTV

Look at the interest rates you're actually eligible for.

Look at the monthly payments.

Look at the fees.

Look at how much money you'd have left after buying.

Then ask how long getting from £10,450 to £20,900 would realistically take you.

MoneyHelper notes that low-deposit mortgages will often cost more because of higher interest rates and can leave buyers more exposed to negative equity if property prices fall.

Those are real disadvantages.

But waiting has consequences too.

There's no universal answer because two people looking at the same £209,000 house can have completely different incomes, rent, savings and job security.

Start With Three Numbers

If buying your first Peterborough home feels impossibly complicated, forget mortgage jargon for an evening.

Find these three numbers:

1. What do the Peterborough homes you'd actually buy cost?

2. How much deposit do you have now?

3. What monthly mortgage payment could you comfortably live with?

Then add a fourth:

How much money would you have left after the deposit and buying costs?

That last number matters more than it gets credit for.

Because becoming a homeowner on Friday and having no emergency money whatsoever by Monday isn't an ideal start.

£10,450 or £20,900?

For someone buying around Peterborough's £209,000 first-time buyer average, that's the comparison.

Not because one figure is automatically right and the other wrong.

Because now you've got something concrete to investigate.

If you have £10,450 saved, find out what a 95% mortgage would actually cost you.

If you're aiming for £20,900, find out what reaching 90% LTV would change.

You might discover waiting makes a big difference.

You might discover the difference is smaller than you expected.

Either way, you're making the decision using your mortgage figures rather than somebody else's rule of thumb.

And whatever deposit you choose, try not to throw every pound you have at the front door.

You'll probably need some of it once you're through it.

Are You Saving for Your First Peterborough Home?

We'd like to hear from Peterborough first-time buyers.

What's proving hardest?

Building the deposit?

Working out how much you can borrow?

Finding something in your price range?

Or getting your head around all the extra costs?

Tell Peterborough Spotlight what stage you're at and the question you can't get a straight answer to but please don't send us private financial or account information.

Comment Below ...

Useful Resources

MoneyHelper’s first-time buyer guide

MoneyHelper’s mortgage affordability calculator