Debtor days calculator: how long your transporters really take to pay

Short answer

Debtor days tell you, on average, how many days of your credit sales are still unpaid. Type your udhar outstanding today and your credit sales (fuel given on credit) over the last 30, 90 or 365 days. Debtor days = outstanding ÷ credit sales × days. Compare the result with the credit days you give: if it is well above them, transporters are paying late on average.

MDG Services makes Khata Kavach, so this page comes from the maker of one of the apps it may mention. It is general information, not legal, tax or financial advice. Facts about other apps are taken from their own websites and app listings on the date shown and can change, so check them there before you decide.

Facts checked on 27 October 2026. Published by MDG Services on 26 October 2026.

Debtor days in plain words: on average, how many days of your credit sales are still waiting to be paid. For a petrol pump whose regular customers take diesel on credit.

Work out your debtor days

Fill the boxes and press the button.

What it means

Debtor days = udhar outstanding today ÷ credit sales in the period × days in the period.

Your credit days are what you agreed. Debtor days is what happens in practice. At or below your credit days, transporters pay in time on average. Above them, some transporters pay late, and the further above, the later.

With made-up figures: Rs 4,50,000 outstanding, Rs 9,00,000 of credit sales in 90 days, 15 credit days given.

StepWorkingResult
Credit sales a day9,00,000 ÷ 90Rs 10,000
Debtor days4,50,000 ÷ 10,00045 days
Outstanding expected at 15 days15 × 10,000Rs 1,50,000
Waiting longer than agreed4,50,000 − 1,50,000Rs 3,00,000

Read it with care

  • It is an average. One big late transporter can hide behind many on-time ones. Ageing shows each transporter's old money.
  • It is rough when credit jumps. A big run of credit fills this week raises what is outstanding before it is due.
  • No standard figure. Compare it only with your own credit days. We give no standard number. The calculator says "well after" once debtor days is more than one and a half times your credit days: a rough marker of ours, not a standard.
  • A long result. If debtor days is longer than the period you picked, some of the outstanding is older than the sales you counted. Try 365 days, or check your figures.

What to do next

If it is well above your credit days, find who is behind it: split each transporter's balance into overdue and not yet due, then age it. Send a reminder to each late transporter, and set a rule for when to stop credit. A shorter credit period or a lower credit limit tends to shrink the number for the next round.

Questions people ask

01What is debtor days?

The average number of days it takes your transporters to pay you. A debtor is someone who owes you money, here a transporter. It is outstanding ÷ credit sales × the days in the period.

02Debtors days formula: do I count cash fills?

No. Count only credit sales. Cash fills are paid on the spot, so adding them makes debtor days look better than it is.

03Debtor days kitna hona chahiye?

There is no number right for everyone. Compare it with the credit days you give: close to them or below is fine, and far above means transporters pay late on average.

04Debtors days meaning in Hindi?

ग्राहकों से पैसा आने में औसतन लगने वाले दिन। The Hindi page of this calculator explains it in Hindi.

05Which period should I pick: 30, 90 or 365 days?

Start with 90. Use 30 when your credit given is steady from month to month, and 365 to smooth out busy and slow seasons.

06Does the calculator save my figures?

No. The sum is worked out on your own phone or computer, and nothing you type is stored or sent.

Related pages

Outstanding vs overdue: what the two words mean for your udharOutstanding is everything a transporter still owes your pump. Overdue is the part past its credit days. One worked example, and why overdue is the number to watch.
Credit limit calculator: how much udhar to give a customerWork out a credit limit for a regular customer at your pump from his monthly purchase and your credit days, with the working shown. A rule of thumb, in rupees.
Late payment interest calculator for a petrol pump: interest on an overdue paymentWork out interest on a transporter's late payment from the amount, the days late and your own yearly rate, simple or monthly compounding, with the working shown.
Udhar vasuli ke upay: seven steps for a petrol pump to ask for its udhar and keep the transporterUdhar vasuli ke upay for a petrol pump with regular transporters who take diesel on credit: seven steps from checking your record to legal steps, and what never to do.

About Khata Kavach (advertisement)

Khata Kavach is a shared credit book for petrol pumps, from MDG Services. The transporter asks before each truck fills, your nozzle man sees the limit before he fills, and both of you see every fill, payment and bill. It never lends or holds money.

About this page. This page is general information published by MDG Services, a brand of VRUOOM PRIVATE LIMITED (CIN U29194HR2021PTC098450), the company that makes Khata Kavach. It is free to read and needs no sign-up.

We make one of the apps. Where a page compares Khata Kavach with another app or another way of keeping credit, remember that we make Khata Kavach. We compare like with like, use only facts the other company publishes, and say plainly where another app does more.

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Not legal, tax or financial advice. Pages about getting paid, notices, interest, courts or tax explain the general position in India on the date shown. Laws and rules change, and every case is different. For your own case, speak to an advocate or a chartered accountant.

Examples are made up. The pumps, transporters, vehicles and amounts in examples are made up, and so is the data on the app screens shown. No example describes a real customer or a real result.

What Khata Kavach is. Khata Kavach records credit fills, bills and payments between a petrol pump and its customers. It never lends money and never holds anyone's money: it is not a bank, a lender or a payment service. A Khata Kavach bill is not a GST tax invoice.

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