How to Get a Mortgage and buying a home is exciting, but the mortgage side of things can feel like a maze of paperwork, jargon, and waiting. The good news is that the process breaks down into five clear stages. Get each one right and the rest tends to follow much more smoothly.
Here is what actually happens, in order, and what to watch out for along the way.
The Five Steps at a Glance
| Step | What you do | What the lender cares about |
|---|---|---|
| 1 | Check your finances and deposit | Income, spending, debts, credit history, savings, buying costs |
| 2 | Work out what you can genuinely afford | Whether the mortgage is affordable now and under the lender’s own rules |
| 3 | Get an agreement in principle | An early borrowing estimate, usually before you make an offer |
| 4 | Choose the right lender and mortgage type | Lender fit, property type, deposit source, income structure, product features |
| 5 | Submit the full application | Documents, underwriting, credit checks, valuation, and the final decision |
An agreement in principle is not a guarantee. A lender can still decline, reduce the amount offered, or ask further questions once they have reviewed your documents and valued the property properly.
The strongest mortgage isn’t necessarily the one with the lowest headline rate. It’s the one that actually fits your circumstances, your evidence, and the property you want to buy.
Step 1: Get Your Finances in Order Before You Start Viewing
Work from your real budget, not the top end of what you’d love to spend.
Before you go any further, it’s worth reviewing:
- Your deposit amount
- Whether your income is stable, variable, or self employed
- Your regular monthly spending
- Credit commitments such as loans, credit cards, car finance, or childcare costs
- How much you’ll want left in savings after completion
- Legal fees, survey costs, valuation fees, removals, and insurance
- Whether Stamp Duty Land Tax or another property tax might apply to you like LBTT in Scotland
- Your credit report with the main credit reference agencies
A common trap is putting every available pound toward the deposit and leaving no buffer for moving costs, unexpected repairs, or a change in circumstances. A bigger deposit helps, but a monthly budget stretched too thin can create real problems later.
A Quick Check Before You Start
| Question | Why it matters |
|---|---|
| Do you know exactly where your deposit is coming from? | Lenders and solicitors often ask for evidence of savings, gifts, or other funds. |
| Have you checked your credit reports? | Incorrect addresses, old linked accounts, or missed payments can cause delays. |
| Are your bank statements clean and explainable? | Lenders may look closely at spending patterns, overdraft use, and undisclosed commitments. |
| Is your income easy to evidence? | Variable, bonus, contractor, or self employed income is often treated differently. |
| Have you budgeted for buying costs? | Legal fees, surveys, removals, and tax can all shift what you can comfortably afford. |
Step 2: Understand Affordability, Not Just Borrowing Power
Mortgage affordability isn’t simply your income multiplied by some fixed number. Lenders look at a combination of income, commitments, household costs, dependants, credit profile, deposit size, loan to value, mortgage term, and their own internal affordability rules.
The Bank of England base rate influences the wider interest rate environment, though individual lenders set their own mortgage rates and can move them for a variety of reasons. That means affordability can shift as rates, stress testing, or product availability change.
Affordability is usually more straightforward if you’re on a basic salary with low debts. It tends to get more complex if you rely on:
- Overtime
- Bonus or commission
- Benefits income
- Zero hours or variable hours work
- Contractor income
- Self employed profits
- Company director income
- Income from more than one job
- Maintenance payments
Different lenders treat the same type of income quite differently. One might use a large chunk of your bonus income, while another averages it differently, or disregards it entirely if there isn’t enough of a track record.
What Salary Do You Need for a £300,000 Mortgage?
There is no single salary figure that guarantees a £300,000 mortgage. Rough income multiples are a useful starting point, but they can be misleading, because the same £300,000 mortgage can look very different depending on your deposit size, debts, credit history, dependants, mortgage term, interest rate, income type, and the specific lender’s criteria.
| Borrower profile | Why the answer can differ |
|---|---|
| Employed applicant with a strong deposit and low debts | Often more straightforward, though still governed by lender rules |
| Couple with childcare costs and car finance | A higher household income can still be limited by existing commitments |
| Self employed borrower | Lenders may use accounts, tax calculations, or company income in different ways |
| Applicant with recent credit issues | Choice of lender may narrow, and borrowing could be reduced |
| Longer mortgage term | Monthly payments may fall, but total interest can rise, and age limits may apply |
Treat online calculators as a rough guide only. Before making an offer on a property, check your real affordability with a lender or adviser using your actual income and commitments.
Step 3: Get an Agreement in Principle
An agreement in principle (sometimes called a decision in principle or mortgage in principle) gives you an early indication of what a lender might be willing to lend, based on initial information.
It can help you:
- Understand a realistic property budget
- Show estate agents you’ve already started the process
- Spot possible issues before you commit to a full application
- Make an offer with a bit more confidence
It is not, however, a mortgage offer. The lender still needs to review your documents properly, complete underwriting, run credit checks, and assess the property itself.
Some agreements in principle only involve a soft credit search. Others involve a hard search that leaves a mark on your file. Worth checking which applies before you go ahead if this concerns you.
Agreement in Principle vs Mortgage Offer
| Point | Agreement in principle | Mortgage offer |
|---|---|---|
| When it happens | Usually before you make an offer, or before a full application | After a full application, underwriting, and valuation |
| What it proves | An initial borrowing estimate only | The lender is prepared to lend, subject to conditions |
| Is it guaranteed? | No | Still subject to conditions and completion requirements |
| Documents checked | Often limited | Detailed income, deposit, identity, bank, and property checks |
| Property assessed | Usually not in full | Usually includes a proper lender valuation |
Step 4: Choose the Right Lender and Mortgage Route
This is where a lot of buyers focus too heavily on the headline rate and not nearly enough on whether the lender actually fits their situation.
The right route depends on far more than the monthly payment. It’s worth thinking about:
- Fixed rate, tracker, or variable rate options
- Product fees and valuation fees
- Early repayment charges
- Flexibility to overpay
- Portability if you might move again during the deal
- Mortgage term and total interest cost
- The lender’s criteria for your particular income type
- Whether the property itself is acceptable to that lender
- Whether your deposit source is acceptable
- How quickly that lender tends to process applications
The cheapest advertised rate is no use at all if the lender won’t accept your income type, deposit source, credit profile, or the property you want to buy.
Mortgage advice is regulated by the Financial Conduct Authority, and a regulated recommendation should be based on suitability for you, not simply the product that looks cheapest on paper. A broker can be especially useful if you’re self employed, have some credit issues, are using a gifted deposit, need high loan to value borrowing, are buying a leasehold flat with building safety considerations, or need a lender that understands variable income.
A Common Trap: Treating the Agreement in Principle as the Hard Part
Picture a first time buyer with a steady salary, a bit of annual bonus income, and a deposit made up of savings plus a gift from a parent. They get an agreement in principle online and use that number as their absolute maximum budget. A few weeks later, they have an offer accepted on a leasehold flat and apply to the lender showing the cheapest monthly payment they can find.
The problem is rarely one single issue. It’s usually the combination. The lender only uses part of the bonus income. There’s recently taken car finance to account for. The gifted deposit needs a proper letter and a clear bank trail. And the flat has lease details and service charges that still need checking. The agreement in principle looked perfectly comfortable, but the full application now depends on all of that lining up together.
| Point to check | Why it matters |
|---|---|
| Bonus income | Lenders may average it, cap it, or ignore it without enough history behind it |
| Car finance | Monthly commitments can reduce affordability more than buyers expect |
| Gifted deposit | Both lender and solicitor may need evidence and confirmation it isn’t repayable |
| Leasehold flat | Lease length, ground rent, service charge, and building safety can all affect acceptability |
| Product choice | The lowest rate is useless if the lender is a poor fit for the buyer or the property |
The lesson here is that these five steps shouldn’t be treated as separate boxes to tick. Affordability, lender choice, deposit evidence, and property risk all need checking together, before you rely too heavily on a budget or get emotionally committed to a purchase.
Step 5: Submit the Full Mortgage Application
Once you’ve settled on a lender and product, the full application process begins in earnest.
You’ll typically need to provide:
- Proof of identity
- Proof of address
- Recent payslips, accounts, tax calculations, or other income evidence
- Bank statements
- Evidence of your deposit
- Details of loans, credit cards, and other commitments
- Property details
- Estate agent details
- Solicitor or conveyancer details
The lender will assess everything and usually arrange a valuation of the property. This valuation is done for the lender’s benefit, and it’s not the same thing as a full building survey, so don’t rely on it to flag structural issues.
If the lender is satisfied, they’ll issue a mortgage offer. Your solicitor or conveyancer then takes over the legal work: searches, enquiries, exchange of contracts, and completion.
What Happens After You Apply
| Stage | What happens | What can cause delays |
|---|---|---|
| Agreement in principle | An initial borrowing estimate | Incorrect information, credit issues, unsuitable lender |
| Offer accepted on a property | You agree a price with the seller | Chain problems, missing proof of funds, slow negotiations |
| Full application | The lender receives your full application and documents | Missing documents, unclear income or deposit evidence |
| Underwriting and valuation | The lender assesses borrower and property risk | Valuation concerns, property defects, further questions |
| Mortgage offer and legal work | Offer issued, solicitor completes checks | Searches, lease issues, title problems, enquiries |
| Exchange and completion | Contracts exchanged, purchase completes | Chain delays, funds not ready, last minute legal issues |
A mortgage offer is a big milestone, but it isn’t the same as owning the property. Completion only happens once the legal work is fully wrapped up and funds have been released.
Documents That Make an Application Easier
Documents aren’t just admin. They’re how the lender checks that your application actually matches the facts.
Core documents most applicants need:
- Passport or driving licence
- Proof of address
- Payslips or employment evidence
- P60 or employment contract
- Bank statements
- Deposit evidence
- Gifted deposit letter, if relevant
- Credit commitment details
- Property details
- Solicitor details
Additional documents for self employed applicants:
- SA302s or tax calculations
- Tax year overviews
- Company accounts
- Accountant’s certificate, if requested
- Business bank statements
- Dividend vouchers or salary evidence
- Details of retained profits, if relevant to the lender
What Can Make Getting a Mortgage Harder
A mortgage becomes harder to secure when a lender sees more risk, either in you, the property, or the evidence provided. Common issues include:
- Recent missed payments, defaults, county court judgements, or insolvency history
- High credit card balances or loan commitments
- Heavy overdraft use
- Unstable or recently changed income
- A short self employed trading history
- An unclear deposit source
- Gifted deposits without a clear paper trail
- Overseas funds that are hard to evidence
- Property defects or unusual construction
- Short leases or other leasehold issues
- Flats with cladding or building safety concerns
- New build incentives that affect valuation or lender criteria
- Buying at auction with a tight timescale
- Relying on optimistic assumptions about income or property value
None of these automatically make a mortgage impossible. They usually just mean lender choice and evidence matter more than they otherwise would.
What to Check at Each Stage
| Stage | What to check | Why it matters |
|---|---|---|
| Before viewing | Deposit, broad affordability, credit reports, buying costs | Avoids falling for homes well outside your realistic budget |
| Before making an offer | Agreement in principle, likely monthly payment, property type, lease or title concerns | Reduces the risk of offering on something your lender won’t accept |
| Before full application | Final lender choice, product, documents, solicitor details, deposit evidence | Cuts down on avoidable delays and underwriting questions |
| Before exchange | Mortgage offer conditions, survey findings, legal enquiries, insurance | Exchange is legally binding in England and Wales, so loose ends matter |
If you’re buying in Scotland, the process and timing differ somewhat, so speak to your solicitor and mortgage adviser before relying on an agreement in principle or making an offer.
Should You Go Direct to a Lender or Use a Broker?
| Route | Potential advantages | Points to watch |
|---|---|---|
| Direct to lender | You deal with them yourself; can suit simple cases | You only see that one lender’s products and criteria |
| Mortgage broker | Can compare multiple lenders and help match criteria to your case | Check whether they’re whole of market or restricted, and ask about fees |
| Adviser plus your own research | Helps you understand the trade offs | Product choice should still be based on suitability, not just the headline rate |
A broker tends to add the most value when the real challenge isn’t finding a good rate, it’s finding a lender that will actually accept your particular circumstances.
Talk to Munro Mortgages
Every application is different, and lender criteria shift regularly. If you’d like help working through your finances, affordability, or lender fit before you apply, get in touch with the Munro Mortgages team. We can help you understand which route is realistic for your circumstances before you commit to anything.
This article is for information only and does not constitute financial or mortgage advice. Your home may be repossessed if you do not keep up repayments on your mortgage.
Leave a Reply