Payment Calculator

People searching for a payment calculator, an installment calculator, or a loan calculator are usually asking the exact same mathematical question: given a principal, a rate, and a repayment period, what is the level amount I must pay every month until the debt is cleared? This page is built to answer that question directly and quickly.

Because the math is identical across naming conventions for any standard fixed-rate amortizing loan, you can trust the number here whether you are budgeting for a personal loan, a car loan, or a home loan, as long as the loan follows the typical reducing-balance repayment structure used by most banks in Pakistan.

Enter the loan principal in PKR, the annual interest rate, and the term in years (or convert months to years if that is how your lender quotes tenure). The calculator returns your monthly payment along with total interest paid over the full term.

If your bank has quoted you a specific monthly payment already, you can also use this page in reverse by trial and error: adjust the principal or rate until the calculated payment matches what you were quoted, which helps confirm you understand the exact terms you are being offered.

The formula is Payment = [P x R x (1+R)^N] / [(1+R)^N - 1], where P is the principal, R is the monthly interest rate (annual rate divided by 12), and N is the total number of monthly payments (years multiplied by 12). This is the standard level-payment amortization formula used across consumer lending.

Because the payment is designed to be constant, the balance of principal versus interest inside each payment shifts steadily from mostly interest at the start to mostly principal near the end, even though the rupee amount you write each month never changes.

Suppose you need to borrow PKR 800,000 for home improvements, and your bank quotes 15% annual interest over a 3-year (36-month) term. The monthly payment works out to roughly PKR 27,700. Over the full term you repay about PKR 997,000 in total, meaning total interest of around PKR 197,000.

If you instead stretched the same loan to a 5-year (60-month) term at the same rate, the monthly payment would drop to roughly PKR 19,000, but total interest would rise to around PKR 340,000 — nearly PKR 143,000 more, purely from the longer repayment window.

If your household budget genuinely caps how much you can pay each month, work the problem backward: start from the maximum affordable payment, then reduce the principal or extend the term until the calculated payment fits within that cap, and only then check whether the resulting total interest is acceptable to you.

Do not forget recurring costs beyond the loan payment itself — insurance premiums, maintenance for asset-backed loans like car finance, or any mandatory savings product a bank requires alongside the loan. These add to your true monthly cash outflow even though they do not appear inside this formula.

If your loan is specifically for a home, the Mortgage Calculator is built around the same formula but sized for larger, longer-term housing finance. For a general installment loan with additional context on rates and tenures typical in Pakistan, the Loan Calculator provides a fuller picture.

Once you know your payment, the Amortization Calculator shows exactly how the first year or two of your specific loan splits between principal and interest month by month, which is useful for understanding how quickly you actually build equity or reduce your balance.

Run the same principal at a rate one or two percentage points higher than the quote you were given. If that stress payment would break your budget, negotiate a smaller loan, a larger down payment, or a different product before you commit.

Also check whether your income is stable enough for the full term. A payment that looks comfortable on paper can become a strain if overtime, bonuses, or a second income disappear for several months.