Real Estate Purchase Budget Calculator
Determine your maximum real estate purchasing power based on target monthly installments, available cash equity, and statutory ancillary acquisition expenses (transfer tax, notary, broker).
$237,660.52
Total purchasing budget including all ancillary costs: $266,346.15
$216,346.15
Financed loan amount$50,000.00
Your personal savings$28,685.62
Taxes, notary & fees$1,500.00
Interest + TilgungCalculation is instantly saved in this shareable URL.
🗄️ Saved Comparison Scenarios (Side-by-Side)
Ancillary Acquisition Cost Breakdown
Itemized transaction expenses that cannot usually be financed via mortgage.
| Expense Category | Effective Percentage | Payable Amount |
|---|---|---|
| Base Property Purchase Price | — | $237,660.52 |
| Real Estate Transfer Tax (Grunderwerbsteuer) | 6.50% | $15,447.93 |
| Broker Commission (Maklerprovision) | 3.57% | $8,484.48 |
| Notary & Land Registry (Notar- und Grundbuchkosten) | 2.00% | $4,753.21 |
| Total Required Budget (Price + Ancillary) | — | $266,346.15 |
How to Accurately Budget for a Property Purchase
Calculating how much home you can afford begins with your sustainable monthly budget and liquid equity capital. Many first-time buyers fall into the trap of confusing the advertised home listing price with the total capital outlay required to acquire the property.
1. Ancillary Acquisition Costs
Depending on your regional jurisdiction, purchasing ancillary costs add 8% to 15% on top of the net purchase price. In Germany, for example, the real estate transfer tax (Grunderwerbsteuer) alone ranges from 3.5% in Bavaria to 6.5% in North Rhine-Westphalia and Brandenburg, alongside standard 2.0% notary/land registry fees and 3.57% buyer broker commissions.
2. Cash Equity Protection
Mortgage lenders rarely finance ancillary fees. Your liquid cash equity must first cover all transaction fees (transfer tax, notary, estate agency) before any remaining cash can serve as down payment to reduce the Loan-to-Value (LTV) ratio.
3. Initial Repayment Rate (Tilgung)
In annuity financing, your monthly payment equals: (Interest Rate + Initial Tilgung) × Loan Amount ÷ 12. Setting a higher initial repayment rate (such as 2.5% or 3.0% instead of 1.5%) accelerates principal reduction and protects you against interest rate shocks when your fixed-rate lock expires.
Calculation Methodology & Proof
How much can I borrow?
We cap the housing payment using the selected country's DTI and/or income-multiple rules, then search for the most expensive home whose PITI still fits.
- Compute the maximum monthly housing budget from DTI (and other debts).
- If the country stresses rates, use rate + buffer (or the floor) to size the loan.
- Binary-search home price so PITI (including tax, insurance, PMI, HOA) fits the budget.
- Apply an income-multiple cap when it binds (UK, IE, NO, …).
Important Caveats & Planning Assumptions
- Credit, reserves, and property type are ignored.
- Lender overlays can be tighter than the published rule of thumb.
Frequently Asked Questions
Expert answers to common questions
Why is the max price not just income × 4?
Taxes, insurance, HOA, existing debts, rate, and term all consume the same housing budget. A 4.5× cap (UK) and a 28/36 DTI cap (US) can produce very different ceilings.
What are Ireland's Central Bank mortgage rules?
First-time buyers (FTB) have a Loan-to-Income (LTI) limit of 4.0× gross income and a 90% LTV limit (10% deposit). Second and subsequent buyers (SSB) have a 3.5× LTI limit and 90% LTV limit. Buy-to-let (BTL) has a 70% LTV limit. Lenders hold a 15% flexibility allowance.
What is a Principal Home Bridging Loan in Ireland?
A short-term loan (up to 18 months) allowing homeowners to purchase a new principal home before selling their existing property, with zero capital repayments required during the term.
What is the stressed rate?
In CA, AU, HK and similar markets you must be able to afford a higher hypothetical rate. We qualify the loan at that stress rate, then show the actual payment at today's rate.
Is this an approval?
No. Lenders also check credit, employment, property, and reserves. Treat the result as a planning ceiling.