Mortgage down payment: rules and documents

Mortgage down payment is the part of the property price financed from your own funds. It affects LTV, the margin and the total cost, and it can influence the bank’s decision. Below is a practical overview: how much is typical, what can count, and which documents to prepare.

For a quick comparison of instalments and total costs, use the Mortgage comparison calculator.

How much down payment is needed and what it depends on

Most banks expect 10–20% of the property value, but the exact level depends on LTV, the property type and bank policy. A higher down payment lowers the loan amount and often improves terms (lower margin, less insurance). If you are considering a no‑down‑payment option, see: Mortgage with no down payment.

In practice, 10% often means additional collateral or insurance of the missing part, while 20% gives more room to negotiate. Banks calculate LTV based on their own valuation, so the required down payment can differ from the transaction price. That is why total cost and APR matter, not just the instalment.

Example: for a 500,000 zł flat, 20% down equals 100,000 zł. On top of that you usually need transaction costs (notary, register entries, taxes), so the real start budget should be higher. You can estimate instalments and total cost in the Mortgage calculator, and compare 10% vs 20% scenarios in the Down payment calculator.

A higher down payment typically means a lower instalment and easier affordability. To see the monthly impact, check: Mortgage instalment — how to calculate.

Indicative: property value → minimum down payment

* Higher LTV can be possible with additional collateral or support programmes. Current limits depend on the bank and supervisory recommendations.

Sources of down payment

Most often these are savings, a family gift, proceeds from selling another property, or an in‑kind contribution (e.g., land). Banks may accept non‑cash contributions but require proof of ownership and valuation. It is also wise to keep a buffer after purchase — lack of reserve is a frequent mistake.

Pay attention to the savings history. Banks commonly review account flows to confirm stability and the source of funds. If the down payment comes from a gift, prepare documents proving the transfer and the legal origin of the funds.

If the contribution is in‑kind (e.g., land), the bank will usually require a valuation and ownership documents. In primary‑market purchases, the developer’s payment schedule matters — the down payment may be split into tranches and must match the loan disbursement timeline.

Keep copies of all documents from the first inquiry to the final decision.

How to prepare documents

For comparing offers, see: Mortgage comparison.

Banks usually require balance confirmation, account history, and source‑of‑funds documentation. Prepare:

• balance and account history confirmations,
• source‑of‑funds document (e.g., gift agreement),
• property documents and payment schedule,
• an initial estimate of transaction fees,
• information about your post‑purchase buffer.

Common mistakes include missing documents, ignoring extra fees, and overly optimistic budget assumptions. A complete, consistent file speeds up analysis and lowers the risk of rejection.

If you compare offers, use the checklist in Mortgage comparison. It helps you check LTV, fees and timing side by side. For cost structure, see: How APR works — rules, limits and examples.

For broader context, see: What a mortgage is and how it works and Mortgage with no down payment.

How to build a down payment safely

Set a target LTV (for example 80–90%) and build a plan around a realistic time horizon. A separate savings account helps keep the goal clear and documents the source of funds. Avoid financing the down payment with short‑term consumer loans — many banks treat it as additional risk and it can reduce creditworthiness. Plan a post‑purchase reserve for repairs and initial furnishing.

What counts as an accepted source

Commonly accepted sources include:

• own savings with documented history,
• a family gift or inheritance with transfer proof,
• proceeds from selling an asset or another property,
• an in‑kind contribution with valuation (e.g., land).

Whatever the source, banks expect a clear trail of funds and legal ownership documents.

Sources

• KNF — Recommendation S
• Mortgage Credit Act (ISAP)
• UOKiK — consumer protection