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Flat vs Reducing Calculator

Flat vs Reducing Calculator is part of Toolspire and is ready as soon as this page loads. Flat interest is charged on the original principal for the whole tenure. Reducing interest is charged on what you still owe. The headline rate is not the same deal.

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What you can do here

Same nominal rate, different cost

Ten percent flat costs more than ten percent reducing because the full principal stays in the interest sum.

Totals, not just the EMI

A smaller EMI can still be the dearer loan. Compare the two totals in the detail.

Zero-rate check

With no interest, both methods return the principal split by the number of months.

The sequence

How to use the Flat vs Reducing Calculator

  1. 1

    Use the rate written on the quote

    Do not convert a flat rate into a reducing rate yourself before typing. This page does that comparison.

  2. 2

    Keep tenure in years

    A 36-month loan is 3 years. The page rounds years to the nearest month count.

  3. 3

    Compare the totals

    The reducing EMI is the big number. The sentence under it is where the flat quote shows its real cost.

Worth knowing

  • Flat vs Reducing Calculator on Toolspire: flat interest is principal × annual rate × years, spread evenly across the months.
  • The reducing EMI is the standard loan formula on the outstanding balance.
  • At 0% both EMIs equal principal ÷ months, so you can see the page is comparing like with like.
  • The headline shows the reducing EMI. The detail line has the flat EMI and both totals.

What the number is actually counting

Flat interest ignores repayments: the lender multiplies the opening principal by the annual rate and by the years, then divides principal plus that interest by the number of months. Reducing interest recalculates each month on the balance left. A flat quote at 10% is a different product from a reducing quote at 10%.

FAQ

Questions about Flat vs Reducing Calculator

Where does Flat vs Reducing Calculator run?

Flat vs Reducing Calculator runs in this tab on Toolspire. What you type or drop in is not sent to us and is not stored on a server.

Why is the flat EMI higher?

Interest is computed on the original principal for every year, even after you have repaid part of it. The reducing method shrinks that base.

Which number should I negotiate?

Ask for the reducing-balance rate, then compare total money paid. A low flat rate can still cost more.

Is the headline the flat EMI?

No. The large figure is the reducing-balance EMI. The flat EMI is in the detail so the two totals sit together.

Does this include processing fees?

No. Add fees and insurance yourself. They are not part of either interest method.

Keep going

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