Getting the keys to your first home is thrilling.
Then the mortgage notification lands in your inbox, and many first-time buyers get a nasty shock: the first payment is significantly higher than expected – sometimes double the agreed monthly amount.
With first-time buyers now representing 20 per cent of all property transactions in the UK (the highest proportion since 2007), thousands of new homeowners are experiencing this same moment of confusion (source)
One statistic that resonates: over the past five years, average first-time buyer mortgage payments have surged by 61 per cent – from £667 monthly to £1,075.
But here’s the good news: there’s nothing wrong with your mortgage offer, and you haven’t been overcharged.
Your first mortgage payment isn’t a surprise hike – it’s actually a mathematical fact.
This happens because your lender starts charging interest the moment you complete on your property, and your first payment covers more than a single month.
In most cases, you’re paying for a partial month (from the completion date onwards) plus your first full calendar month of repayment.
This guide covers why your first mortgage payment is higher, how it’s calculated, and how you can plan your finances properly instead of panicking when the payment arrives.
Table of Contents
How Mortgage Payments Work?
To understand why your first payment is higher, you need to grasp one fundamental principle of UK mortgages: payments are made in arrears.
This means you don’t pay for the month ahead – you pay for the month that’s just passed. It’s different from rent, where you often pay upfront. With mortgages, you’re always paying yesterday’s debt, not tomorrow’s.
This system creates a gap between completing on your property and making your first payment. That gap is where the confusion begins.
Why Is My First Mortgage Payment Higher?
The main reason behind your higher first payment is prorated interest.
Let’s break this down simply. The moment your mortgage lender releases the funds to complete your purchase, interest starts accumulating daily on your loan.
Unlike subsequent months when you owe a full month’s interest, your first month is partial. Here’s why:
Say your mortgage completes on the 7th of March. Your lender doesn’t release funds on that exact date – they typically release them a day or two before completion (around the 6th).
Your payment date is set for, let’s say, the 1st of each month. So your first payment needs to cover:
- Interest from 6th March to 31st March (26 days of daily interest)
- Plus your full mortgage payment for April
That’s roughly 1.5 months’ worth of payment combined into one go.
The prorated interest amount depends on:
- Your loan amount
- Your interest rate
- The exact number of days between completion and your normal payment date
When Will You Make Your First Payment?
Most UK homebuyers make their first mortgage payment on the 1st of the second month after completing their purchase.
Here’s how the timeline typically works:
- Completion occurs: Let’s say 16th September
- No payment required: Throughout September
- No payment required: Throughout October (this is your grace month)
- First payment due: 1st November
However, your exact date depends on when you complete relative to your payment date.
Your lender will notify you of the precise date in writing, usually within 5-7 working days of completion.
How To Budget Plan for Your First Mortgage Payment?
Before you panic about affording the higher first payment, remember it’s temporary. After that first one, your payments return to the normal agreed-upon amount shown in your mortgage documentation.
The best approach is to prepare mentally and financially. When you receive your mortgage offer, ask your lender to estimate your first payment amount.
This gives you time to plan. If you’re worried about affording it, contact your lender immediately – most have support options.
According to recent data from TSB, first-time buyers who negotiated their property price saved an average of £22,900, which could help cover unexpected costs such as moving and the higher first payment.
What If You Can’t Afford Your First Payment?
If you’re genuinely struggling to make your first mortgage payment, you’re not alone, and help exists.
Your first step should be contacting your lender directly. Explain your situation clearly.
Most lenders have specialist support teams and must treat you fairly under Financial Conduct Authority rules.
Your lender might offer options such as:
- A payment holiday or temporary break
- A repayment plan spread over several months
- Extending your overall mortgage term to reduce monthly costs
- Capitalising the arrears (adding them to your mortgage balance)
Additionally, most UK mortgage lenders offer a grace period of 10-15 days after the due date before considering your payment officially late.
This grace period can be crucial if you’re running a bit behind on your first payment. Within this window, you can usually make the payment without incurring late fees.
Make sure to check your mortgage offer for details on your grace period and what happens if you miss the deadline.
Frequently Asked Questions
Why is my first payment so much higher than others?
Every first payment is calculated individually based on your completion date, loan amount, interest rate, and payment schedule. If yours seems drastically higher, contact your lender to confirm the calculation.
Can I ask my lender to delay my first mortgage payment?
Yes, you can discuss this with your lender. While they cannot indefinitely defer your payment, some lenders may accommodate reasonable requests during difficult financial periods.
Does my first payment count towards paying down my loan principal?
Yes, but the vast majority of your first payment goes towards interest rather than reducing your loan balance.
Your home may be repossessed if you do not keep up repayments on your mortgage.
All content is written by qualified mortgage advisors to provide current, reliable and accurate mortgage information. The information on this website is not specific for each individual reader and therefore does not constitute financial advice.
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