What is a loan amortisation calculator?

A loan amortization calculator is a free online tool that allows you to calculate your monthly payment, remaining balance, and total interest cost of your loan. Whether it’s a personal loan, car loan, or installment loan, the calculator shows you at a glance how your loan repayment develops month by month.

With our amortization calculator, you receive a detailed amortization schedule that clearly shows the breakdown between interest and principal repayment. This helps you make well‑informed decisions about loan term, monthly payment amount, and potential early repayments – before signing a loan agreement.

How does the amortization calculator work?

The loan calculator uses the annuity formula to generate a complete loan repayment schedule from your input. You enter the basic loan details – the calculator does the rest and provides you with an immediate overview:

• Monthly instalment: The fixed amount you pay back each month.
• Interest portion: The portion of the payment that goes to the bank as loan costs.
• Repayment amount: The amount that directly reduces your debt.
• Residual debt: The remaining loan amount after each payment – until the end of the contract.

What information does the loan repayment calculator require?

To accurately calculate your loan repayment, you only need a few details:

• Loan amount: The total amount you wish to borrow – e.g. CHF 10,000, CHF 30,000 or CHF 50,000.
• Term in months: The repayment period. In Switzerland, terms of 6 to 120 months are common.
• Effective annual interest rate: The interest rate that includes all borrowing costs. Swiss banks offer interest rates between 4.4% and 10.95%.
• First installment due on: The date of your first installment payment – the amortization schedule then shows the specific payment dates month by month.
• Special repayment (optional): Additional payments to pay off the loan faster.

Monthly payment: Understanding interest and amortization

Each monthly loan payment consists of two components that change over time:

Interest portion: The cost of the borrowed capital. Since interest is calculated on the remaining balance, this amount decreases with each payment.

Repayment amount: The amount that actually reduces your loan debt. This portion increases over time, while the interest portion decreases.

At the beginning of the loan term, you pay more interest; towards the end, the majority of your payment goes towards principal repayment. The outstanding balance decreases with each payment until it reaches zero at the end of the term.

The annuity method explained simply

Most personal loans in Switzerland are based on the annuity method. You pay a constant monthly installment throughout the entire loan term. Within this constant installment, the ratio of interest to principal repayment changes:

• At the beginning, the interest portion is high because the remaining debt is still large.
• With each installment payment, the outstanding debt decreases – thereby reducing the interest portion.
• At the same time, the repayment portion automatically increases because the rate remains constant.
• Towards the end of the term, the payment consists almost entirely of amortization.

Special repayment: How to save thousands of francs in interest

A special repayment is an additional payment outside the agreed repayment schedule. It reduces the outstanding debt in one go – and thus also future interest costs. This is particularly attractive for borrowers in Switzerland, as the Consumer Credit Act (KKG) guarantees the right to early repayment.

What are the effects of a special repayment?

When making an extra repayment, you have two options: shorten the loan term while keeping the monthly payment the same – or maintain the same loan term and lower the monthly payment. Both options result in noticeable interest savings. The earlier you make the extra repayment, the greater the savings.

Special repayment on Swiss private loans

In Switzerland, according to the Consumer Credit Act, you have the right to repay your loan in full or in part at any time:

• The notice period is usually three months.
• Some banks charge fees of CHF 100 to CHF 200 for the final statement.
• According to the law, the remaining interest costs must be waived for you.
• Check beforehand whether the fees are lower than the interest saved.

When is a special repayment worthwhile?

• If you receive an inheritance, bonus payment, or refund.
• If you find more favorable terms with another provider (debt restructuring).
• If the remaining term is still long and many interest payments are outstanding.
• If the fees for early repayment are significantly lower than the interest savings.

Repayment schedule: Your loan overview month by month

An amortization schedule shows you how your repayment is composed for each individual month:

• The amount of the monthly payment (constant for annuity loans).
• The interest portion and the principal repayment portion of each individual payment.
• The development of the remaining debt from the first to the last installment.
• The total interest costs over the entire term.
• The effect of special repayments on the loan term and total costs.

A repayment plan allows you to objectively compare different loan offers – especially important if you have several offers from Swiss banks.

Early loan repayment in Switzerland

The Swiss Consumer Credit Act (KKG) grants you extensive rights: You can repay your personal loan early at any time – in whole or in part. In this case, the remaining interest costs will be waived.

You can voluntarily pay back more than the agreed monthly installment, make a larger one-time special repayment, or pay off the entire remaining balance in one go. Use the repayment calculator beforehand to check how early repayment will affect your total costs.

One particularly interesting scenario is the Debt restructuringIf you find better terms at another credit institution, you can pay off the existing loan and replace it with a cheaper one.

Calculation example: Repayment and remaining debt in concrete terms

A concrete example of a Swiss personal loan:

Effect of a special repayment: With a special repayment of CHF 3,000 after 12 months:

Frequently asked questions about the loan repayment calculator

Conclusion: Why you should calculate your repayment now

A loan repayment calculator is the most important tool for every borrower in Switzerland. It provides you with complete transparency regarding your monthly payment, the remaining debt, and the total interest costs – and shows you how you can save considerably through extra repayments.

Use our repayment calculator to compare different scenarios: varying loan terms, interest rates, or extra repayments. This way you can find the optimal repayment strategy – free of charge, without obligation, and in just a few seconds.