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Petty Cash for a Small Business: A Simple Control Routine

How an Indian small business can run petty cash with a fixed float, a voucher for every payment, a weekly count and a top-up that doubles as a check, without letting cash replace bank payments.

7 min read

Short answer

Run petty cash on a fixed float. Decide a small amount that covers a week or two of minor expenses, give one person charge of it, and record every payment on a voucher with the bill attached. Count the cash against the vouchers each week. When you top up, add back exactly what the vouchers show was spent, so the float returns to the same amount and every rupee is explained. Keep petty cash for small, routine costs. Pay suppliers, salaries and larger bills from the bank, because income-tax law restricts some cash payments and receipts above set limits, and a valid tax invoice in the business's name is one of the conditions for claiming GST credit. Last reviewed: November 2026.

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What is petty cash for, and what is it not for?

Petty cash is a small amount of cash kept at the office, shop or site for minor expenses that are not worth a bank payment: courier charges, tea and snacks for visitors, local conveyance, small stationery, a quick repair. It exists to save time, not to replace the bank.

  • Use it for small, routine, low-value expenses that need paying on the spot.
  • Do not use it for supplier bills, rent, salaries or advances to staff. These belong in the bank, where there is a record.
  • Do not mix it with sales cash from the counter. Takings go to the bank; petty cash is a separate box with its own record.
  • Do not use it for personal spending by the owner. Owner drawings should be recorded as drawings, not hidden in expenses.

How does a fixed float work?

Under a fixed float, also called the imprest system, petty cash always starts each period at the same amount. Between top-ups, the cash in the box plus the vouchers for what was spent should always add up to that amount. When you top up, you replace exactly what the vouchers show, no more and no less.

This makes the check simple. At any moment, anyone can count the cash, add the vouchers, and see whether the total matches the float. If it does not, something is missing: a voucher, some cash, or both.

Choose the float from your own spending. Look at a few weeks of small expenses and set the float to cover about one to two weeks. Too large a float keeps idle cash in a drawer; too small a float means constant top-ups.

What should every petty cash voucher show?

  1. Date and a running voucher number.
  2. Amount paid and what it was for, in plain words.
  3. Who received the money, and their signature where there is no bill.
  4. Who approved it, if the amount is above the level the custodian can pay alone.
  5. The original bill or receipt attached. A valid tax invoice in the business's name is one of the conditions for claiming GST credit.
  6. The expense head it belongs to, such as conveyance, office supplies or repairs.

A payment without a voucher should be treated as a shortage, not as an expense. That one rule removes most of the arguments later.

How do you run petty cash, week by week?

  1. 01

    Hand over the float

    Draw the float from the bank by cheque or transfer, record it in the books, and hand it to one named custodian. The custodian signs for it.

  2. 02

    Pay against vouchers

    Every payment gets a voucher and, where possible, a bill. The custodian files them in order in the same box or folder as the cash.

  3. 03

    Count each week

    Count the cash and add up the vouchers. The total should equal the float. Someone other than the custodian should do or witness this count.

  4. 04

    Top up from the bank

    Total the vouchers by expense head, book them in the accounts, and draw exactly that amount from the bank to restore the float. The top-up record is the summary of what was spent.

  5. 05

    Review the pattern each month

    Look at what petty cash is paying for. If one expense keeps appearing, such as a regular courier or a monthly repair, move it to a bank payment with a proper bill.

What does a count look like with real numbers?

If the Rs 200 had not been traced, it would be recorded as a shortage and reviewed by the owner, not booked as an expense with no support.

What should you do about shortages and overs?

Common petty cash differences and what to do
DifferenceUsually meansWhat to do
Small shortage, tracedA voucher was not written upPrepare the voucher, get it signed by the payee or approver, and note the delay.
Shortage that cannot be tracedLost cash, a payment not recorded, or misuseRecord it as a shortage, report it to the owner, and decide on recovery. Do not hide it in an expense head.
Cash over the floatChange not given back, or a receipt put in the wrong boxFind the source. Customer or sales money goes to the bank and the sales record, not into petty cash.
Repeated differences with one custodianWeak process or a control problemTighten the routine: daily vouchers, a witnessed count, and a smaller float.

What keeps petty cash hard to misuse?

  • One custodian at a time. When the custodian changes, count the cash together and both sign the handover.
  • A count done or witnessed by someone else, at least weekly and on a surprise day now and then.
  • An approval limit. The custodian pays small items alone; anything above that needs the owner's signature on the voucher.
  • No IOUs or loans to staff from petty cash. Staff advances go through the bank and are recorded against the person.
  • A locked box, kept separate from sales cash.

The petty cash record also feeds your monthly close. Check it alongside the monthly bank reconciliation, so that the top-ups drawn from the bank match the petty cash summaries in your books.

Sources and review

Published by ThynkBored. Published 4 November 2026. Content review completed 4 November 2026. The byline identifies accountability for the page; it does not represent an individual author, credential, professional certification, or evidence of CA, CS, accounting, or legal review.

  1. Income Tax Department e-filing portal

    Income Tax Department, Government of India. Accessed 17 October 2026.

    Supports: Official source for current income-tax rules on cash payments and receipts and on books of account, which this guide refers to without stating limits.

  2. Central Goods and Services Tax Act, 2017 (CBIC tax information portal)

    Central Board of Indirect Taxes and Customs, Government of India. Accessed 17 October 2026.

    Supports: Input tax credit requires possession of a tax invoice or other prescribed document.

  3. Central Goods and Services Tax Act, 2017 (India Code, text as on 11 June 2026)

    Legislative Department, Ministry of Law and Justice, Government of India. Accessed 4 November 2026.

    Supports: Section 16(2)(a): credit needs a tax invoice or debit note from a registered supplier, or another prescribed tax paying document, and section 16(2) sets further conditions.

This guide is an educational overview of a petty cash routine. It is not accounting, tax or legal advice. The figures in the example are synthetic and illustrate the method only. It states no cash-payment limit, record-keeping period, threshold or rate; confirm current requirements on the official portals above or with your chartered accountant.

Tell us how petty cash runs today

Share only your business type, roughly how many locations keep cash, who handles it, and how often it is counted. ThynkBored can help set up a float, a voucher routine and a monthly review.

Use categories and ranges only. Do not send cash books, vouchers, bank statements, staff names, passwords, OTPs or files through the form. Agree a secure handoff first if records need review.

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Questions owners ask

How much petty cash should a small business keep?

Enough to cover one to two weeks of small, routine expenses, based on what you actually spent in recent weeks. Too much leaves idle cash in a drawer and raises the cost of a loss. Too little means frequent top-ups. Review the float every few months as your spending pattern changes.

Can I claim GST credit on petty cash expenses?

Only where the expense qualifies for credit and the other conditions are met. A valid tax invoice in the business's name is one of the conditions for claiming GST credit. Many small cash expenses come without such an invoice. Ask your chartered accountant which petty cash expenses are worth collecting tax invoices for.