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Loan calculator – annuity or straight amortization

Compare annuity and straight amortization, including first and last payments, interest and fees.

Loan details

Enter the amount, nominal interest rate and term. Add setup and monthly fees charged by the lender.

Amount borrowed before interest and fees.

Choose a level annuity or straight amortization with declining payments.

The quoted rate before fees.

Time until the loan is repaid.

Advanced settings

One-off fee when the loan starts.

Loan cost

Estimate using the selected repayment model and an unchanged interest rate.

First monthly payment
SEK 2,057

Interest, principal and the entered monthly fee in the first month.

Details

Last monthly payment
SEK 2,057

With straight amortization, the payment falls as interest is charged on a smaller balance.

Payment before fees
SEK 2,028

Interest and principal in the first month.

Estimated effective annual rate
9.18%

Annualized cost including entered fees and every payment. Compare it with the lender's official APR.

Total interest
SEK 21,658

Estimated interest over the full term.

Total fees
SEK 2,235

Setup fee plus all monthly fees.

Total repayment
SEK 123,893

Principal, interest and fees combined.

Analysis & guidance

  • Try a shorter term

    Check whether a higher monthly payment is manageable; fewer payments often mean less total interest.

  • Include every fee

    Do not compare offers until setup and recurring charges are included.

  • Stress-test the rate

    For a variable-rate loan, try a rate a few percentage points higher to see your margin.

Common loan questions

What is an annuity loan?

It is a loan where interest and principal normally add up to the same payment each period while the interest rate stays unchanged.

Is the monthly fee included?

Yes. It is added to the monthly cost and included in total fees.

Why is the lender's result different?

The lender may use different payment dates, rounding, variable rates, insurance or fees not entered here.

Is the lowest monthly payment always best?

No. A longer term often lowers the monthly payment but usually increases total interest.

How annuity payments work

With an annuity loan, the payment before fees stays level while the interest rate is unchanged. Interest is a larger share at first and principal becomes a larger share later.

Small fees add up

A modest statement fee repeats every month and can become meaningful over a long term. Keeping fees separate makes offers easier to compare.

Check the agreement's APR

This estimate uses the nominal rate and fees you enter. Always check the lender's annual percentage rate, repayment schedule and full terms before borrowing.

How the loan calculator works

Choose an annuity loan or straight amortization. An annuity keeps the payment before fees level while the rate is unchanged. Straight amortization repays the same principal each month, so payments start higher and fall as the interest charge shrinks.

Compare the full cost

Do not judge a loan by its monthly payment alone. A longer term can reduce today's payment while increasing total interest. Include both the setup fee and monthly fee when comparing offers.

Nominal and effective interest

You enter the nominal annual rate. The effective rate also reflects fees and payment timing, making it the better comparison figure. Our total repayment illustrates the fees, but the lender's effective-rate disclosure remains authoritative.

Keep in mind

This is an estimate. Variable rates, changed fees, extra repayments and lender rounding can alter the final cost. Check your personal loan offer before signing.

How to read this calculator

These results are meant as guidance. They are based on rules, assumptions, and simplified models that can differ from your exact real-world situation.

Estimate, not a legal decision

Use the result as decision support and planning help. For high-stakes choices, confirm the details with the relevant authority, lender, employer, or adviser.

Methodology

Each calculator uses defined inputs, assumptions, and logic. We explain the broader approach on the methodology page.

Read methodology

Sources and updates

Important calculators should be traceable back to official rules, public guidance, or other clearly stated references.

Read about sources

Sources used for this topic

Common loan questions

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Do not compare offers until setup and recurring charges are included.

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