The calculator combines applicant, spouse and other documented household income, subtracts existing payments, and estimates borrowing capacity from your chosen scenario ratio, loan type, monthly rate and term. It is not a bank approval.
What does this calculator estimate?
This calculator estimates the maximum loan amount you may be able to carry from your income and existing monthly installments. It first estimates a monthly payment capacity, then converts that payment into an approximate loan amount using the selected monthly interest rate and term.
- It starts from net monthly income.
- It subtracts existing monthly installments from the assumed payment capacity.
- It uses monthly interest and term to estimate a maximum loan amount.
- It shows the estimated maximum monthly installment separately.
- It does not represent a bank's credit approval.
This result is not a guaranteed credit decision. Banks may offer a lower amount or reject an application based on documented income, credit score, existing debts, employment status, product type, collateral and their own risk policies.
How is borrowing capacity calculated?
The calculator first estimates the highest monthly installment you could carry, then calculates what loan amount that installment can support under the selected monthly interest rate and term.
The simplified logic is: new-payment budget = entered documented household income × selected scenario ratio - existing monthly payments. This budget is converted into approximate principal with the selected loan type's tax profile and the present-value formula for a fixed-payment loan.
The editable 50% value is only a starting scenario, not a statutory or common bank approval limit. Change it to stress-test your budget; the bank decides eligible income and its accepted ratio.
What is debt-to-income ratio?
Debt-to-income ratio compares monthly debt payments with monthly income. As this ratio rises, the room for a new loan usually becomes smaller.
For example, if a user has 50,000 TL net monthly income and 12,000 TL in existing installments, the calculator first treats 25,000 TL as the assumed upper payment capacity, then subtracts 12,000 TL and leaves about 13,000 TL for a new loan installment.
Rent, bills, food, transport, family expenses and unexpected costs are not itemized in this calculation. The maximum installment shown may not be safe for your personal budget.
Why do net income and existing installments matter?
Net income and existing installments are the two main inputs for this estimate. Higher income increases theoretical payment capacity; existing monthly debts reduce the room available for a new loan.
- Use net monthly income after deductions, not gross salary.
- Include existing personal, auto, mortgage and other regular loan installments.
- Credit card installments and recurring debt payments can also affect real affordability.
- If income cannot be documented, the bank may not count all of it.
Entering zero for existing installments while you still have ongoing debts can make the estimate overly optimistic.
How do monthly interest and term affect the result?
A higher monthly interest rate reduces the loan amount that the same monthly payment can support. A longer term can increase the estimated loan amount, but in a real loan it may also increase total cost.
This calculator expects a monthly interest rate. Entering an annual rate directly into this field will distort the result. If a bank quotes an annual rate, make sure you use the corresponding monthly rate in this calculator.
The selected term affects the mathematical estimate, but the actual loan product may also have legal, regulatory or bank-specific term limits that this calculator does not automatically enforce.
Does this calculator apply product-specific loan limits?
It applies the interest-tax profile for the selected personal, housing or personal-vehicle loan and enforces the amount-based BRSA term check for a personal-loan estimate.
- Personal loans may have amount-based term limits.
- Auto loans may depend on vehicle price, down payment and loan-to-value rules.
- Mortgages may depend on property value, appraisal, loan-to-value ratio and additional costs.
- This calculator does not apply those specialized product rules.
Once you know the type of loan you want, treat this result as a starting point and use a personal loan, auto loan or mortgage calculator for product-specific assumptions.
Why can a bank offer a different amount?
A bank may offer a different amount because this calculator uses only income, existing installments, interest and term. Banks also consider credit score, documented income, employment history, debt behavior, product type, collateral and internal risk policies.
- A lower credit score can reduce the approved amount.
- Undocumented income may not be fully counted.
- Credit card debt and limit usage can affect the decision.
- The bank may apply a lower debt-to-income threshold.
- Mortgage and auto loans may be limited by collateral and product rules.
How is this different from a loan installment calculator?
This calculator starts from income and estimates a possible loan amount. A loan installment calculator starts from a known loan amount and calculates monthly payment and total repayment.
- Use this calculator if you do not yet know the loan amount.
- Use a loan installment calculator if you already know the amount you want to borrow.
- Use personal loan, auto loan or mortgage calculators when the loan type is clear.
- Use a loan comparison calculator when comparing two bank offers.
Example estimate
Assume a user has 45,000 TL net monthly income, 6,500 TL in existing monthly installments, a monthly interest assumption of 3.20% and a 24-month term. The calculator first takes 50% of income as 22,500 TL, subtracts 6,500 TL, and leaves about 16,000 TL as monthly room for a new loan.
That monthly payment room is then converted into an approximate loan amount using the selected interest and term. A 12-month term would support a lower amount; a 36-month term may support a higher mathematical amount, but product-specific limits still matter.
This example explains the calculation logic. A real bank offer may differ because of credit score, fees, insurance, documented income, product type and risk assessment.
What if no result appears?
If no result appears, your existing installments may be equal to or higher than the payment capacity assumed by the calculator. In that case, there is no positive monthly room left for a new loan under this calculation.
For example, if 50% of income is 18,000 TL and existing installments are already 18,000 TL or more, the calculator cannot find a positive installment amount for a new loan. This is not a formal bank decision, but it is a strong affordability warning.
What are the limits of this calculation?
This calculation is informational and does not replace a loan application result. It estimates borrowing capacity from income, installments, interest and term; it does not calculate credit approval, credit score or product-specific banking rules.
- Credit score and bank risk assessment are not included.
- Insurance, fees and additional costs are not calculated; only the selected loan type's interest-tax profile is applied to capacity.
- Mortgage and vehicle loan-to-value, down-payment and collateral limits are not calculated.
- Live bank campaigns and rates are not displayed.
- The editable 50% default is a scenario, not a guaranteed approval threshold.
Before applying for credit, check the bank's current conditions, income acceptance rules, credit score assessment, fees and product-specific restrictions.
Frequently Asked Questions
How is borrowing capacity calculated?
The calculator estimates a monthly payment capacity from net income, subtracts existing installments and converts the remaining payment room into an approximate loan amount using monthly interest and term.
Does this mean the bank will approve that amount?
No. It is an estimate only. Banks also consider documented income, credit score, existing debts, employment status, product type and internal risk policies.
Should I enter monthly or annual interest?
Enter monthly interest. Entering an annual rate directly into the monthly interest field will make the result inaccurate.
Do existing installments reduce the amount I can borrow?
Yes. Existing monthly installments reduce the payment room available for a new loan, so the estimated borrowing capacity becomes lower.
Can I use this for mortgage or auto loan decisions?
Only as a starting estimate. Mortgage and auto loans have additional factors such as property or vehicle value, down payment, loan-to-value rules, insurance and product-specific limits.