In short
LTV is the share of the property value the lender finances: up to 80% for a resident’s main home, typically 60–70% for a non-resident. DTI is the share of net income spent on all debt repayments, and Spanish lenders are comfortable up to about 30–35%. On €2,500 net a month, that means total repayments of around €875.
When you apply for a mortgage, it feels as if the bank is judging you as a person: your job, your life, your future. In reality it judges you as a spreadsheet. Behind every approval or refusal there are three or four ratios that reduce your situation to a few numbers, and a scoring system that weighs them.
Most people apply without knowing what those numbers are or how they move the needle. It is like playing a game without knowing the rules. Here they are, on the table, including what changes if you live outside Spain.
1. LTV: how much of the property you fund and how much the lender does
LTV (loan-to-value) is the queen of all the figures: the percentage of the property value that the lender finances.
If you buy a €200,000 home and borrow €160,000, your LTV is 80%. You contribute the remaining 20% (€40,000) plus taxes and costs.
The lender applies the ratio to the value it accepts, normally the lower of purchase price and valuation. A valuation above the price does not create extra borrowing capacity; one below it leaves a gap you fill with cash.
Why does the lender care so much? Because LTV is its safety cushion. If you stop paying and it has to take the property, the more you put in, the better protected it is. So:
- Low LTV (60–70%) → less risk for the lender → better rates and more room to negotiate.
- High LTV (80%) → more risk → worse rates and more scrutiny of the rest of your profile.
- Above 80% → exceptional territory. It exists, but it needs a very strong profile or additional guarantees.
The deposit is not just the money you need to buy. It is the lever you negotiate everything else with. Every point of LTV you cut is ammunition at the table.
2. DTI: the weight of repayments on your income
DTI (debt-to-income), or debt ratio, measures how much of your income goes on repaying debts. Add up all your monthly repayments, the new mortgage plus any loan you already have, and divide by your net income.
The reference almost every Spanish lender respects: that total should not exceed 30–35% of what you earn.
Worked example. You earn €2,500 net a month. The 35% threshold is €875. If the mortgage payment comes to €700, you fit comfortably. But if you also pay €250 a month for a car loan, you are at €950 and over the line. The lender will not see a €700 mortgage: it will see €950 of total debt.
Hence one of the most expensive and least known lessons: the consumer loan you took out for the car can cost you the house. Not because of the money, but because of the space it takes up in your DTI.
The exact definition varies by lender: some count only part of variable pay, some include credit-card limits, and maintenance payments count too. Living costs and household size also form part of responsible lending.
3. The savings left after the deposit
Lenders do not only check that you have the deposit. They look at what is left afterwards. Emptying every last euro to reach the 20% is a warning sign: the first setback, a repair or a bad month, puts you against the ropes.
A cushion after the purchase, a few months of payments put aside, does not lower your rate on its own, but it changes how the analyst sees you: from “tight” to “solvent”. In borderline cases that perception decides.
4. Scoring: the grade you never see
Every lender runs your file through a scoring system that combines everything above with your history: missed payments, how many financial products you hold, time in your job, your age relative to the loan term, your profession and your sector.
You will never see that grade, but it conditions everything. Two people with the same salary and deposit can receive different offers because their scoring differs in details they would not imagine. And, crucially, each lender scores differently: the sector one penalises, another rewards.
The table to have before you apply
| Ratio | What it measures | Comfortable zone | How to improve it |
|---|---|---|---|
| LTV | % the lender finances | ≤ 70–80% | A bigger deposit |
| DTI | Debt against income | ≤ 30–35% | Clear existing loans |
| Savings after purchase | The cushion you keep | 3–6 months of payments | Do not stretch the deposit to the limit |
| Job stability | Time and type of contract | The more, the better | Avoid changes just before applying |
What changes for a non-resident
The same ratios apply if you live abroad, with tighter settings:
- LTV of 60–70%. Lenders typically finance 60–70% of the lower of price and valuation, against 80% for a resident. On a €300,000 home that is a €180,000–€210,000 loan and €90,000–€120,000 of your own money, before taxes and costs. Size the total with the property purchase costs calculator.
- DTI measured in euros. The 30–35% reference still applies, but income in pounds, dollars or francs is converted, and some lenders apply a safety margin. Worked example: if your repayments take 33% of your income today and your currency falls 10% against the euro, the same euro payment takes about 36.7%.
- Debts abroad count. A mortgage on your home-country property, car finance and credit cards all go into the DTI.
- Evidence from your country. Tax returns, payslips or company accounts and bank statements, translated where needed, plus an NIE to complete.
Our guide to foreign income in a Spanish mortgage covers currencies in detail, and our non-resident mortgage service explains how we take these files to lenders.
Model scenarios, not one maximum
Calculate a base case and a conservative case with a smaller loan or a higher rate. For variable or mixed mortgages, test the payment after the fixed period. Include insurance and ownership costs in your budget even if they are not part of the formal DTI. The Spanish mortgage calculator gives the payment, maximum loan and income needed.
How to use this in your favour
Understanding these ratios is not general knowledge: it is strategy. It lets you do three things before you set foot in a bank.
First, prepare. If your DTI is tight, pay off the car loan six months earlier. If your LTV is high, find a way to contribute a little more. Small adjustments beforehand move the conditions more than any later negotiation.
Second, choose the right lender. Because each lender scores differently, your profile fits some better than others. Taking your file to the one that values your profession or sector is not luck: it is knowing the map.
Third, present well. The same numbers, ordered and explained, produce a better effective score than loose figures without context. Form matters as much as substance.
No ratio guarantees approval: lenders apply internal policy, verify documents and review the property. Structuring a transaction means reading your ratios as the lender will, improving them where possible and taking them to the lender that will score them best. RCG Finance does that work, and we only charge if we get your mortgage. Request a free assessment with the purchase price, savings, income and current monthly debts.
Sources and review
Prepared by the RCG Finance editorial team (RCG 2026 S.L., Bank of Spain register of credit intermediaries no. E760) and reviewed by Rafael, founder of RCG Finance and former debt and M&A advisor at KPMG and PwC, under our editorial standards. Last source review: 1 October 2026.
Frequently asked questions
What is LTV in a Spanish mortgage?
LTV (loan-to-value) is the percentage of the property value the lender finances. If you buy a €200,000 home and borrow €160,000, the LTV is 80%. The lower your LTV, the more you put in yourself, the less risk the lender takes and the better the conditions you can obtain.
What is the maximum debt-to-income ratio for a mortgage in Spain?
The usual reference is that all your monthly repayments, the new mortgage plus any other loan, should not exceed about 30–35% of your net income. Above that threshold the lender considers the effort too high and any setback could lead to missed payments.
Can I improve my ratios before applying for a mortgage?
Yes, and it is the most profitable thing you can do. Paying off consumer loans, not financing a car just before buying, increasing the deposit even by a few points and keeping your accounts orderly in the preceding months directly improve your DTI and LTV, and with them the conditions you will be offered.
Does an acceptable LTV guarantee mortgage approval?
No. The lender also assesses affordability, income stability, debts, property, credit history and its own policy.
What LTV can a non-resident get in Spain?
Lenders typically finance 60–70% of the lower of purchase price and valuation for a non-resident, against 80% for a resident. Plan a 30–40% contribution plus purchase taxes and costs, which are paid from your own funds.
How do Spanish lenders calculate DTI with foreign income?
Your income is converted to euros and tested against the same 30–35% reference, with your debts abroad included. Some lenders apply a margin for exchange-rate movement, so a ratio that looks comfortable today may be assessed as tighter.
