When your customer is also your supplier

Keep the two directions apart. What he owes you and what you owe him are two separate records under one name, and only the difference is ever settled. Adjusting in your head feels faster and is the single most expensive habit in this kind of trade. Write both sides, settle on a fixed day.

One man, two directions

Most small markets are full of these arrangements. The baker on the corner buys sugar and oil from your shop all month, and every morning your family eats his bread. The tailor buys soap and tea from you, and stitches the cover for your counter. The electrician takes groceries on his khata, then repairs your freezer in June and hands you a bill.

None of this is unusual and none of it is a problem. It becomes a problem for one reason only: the money is moving in two directions and most shops keep one record.

When there is one record, whoever is holding the pen decides the story. He remembers the freezer repair as Rs 4,500. You remember agreeing Rs 3,800. Neither of you is lying. You are both recalling a number nobody wrote down, six weeks after a conversation that lasted forty seconds.

The way out is boring and it works. Two records, one name, one settlement day.

Why "we will adjust it later" costs you money

Listen to what that sentence actually promises. It says: we will both carry two running totals in our heads, we will both estimate them correctly, and we will both arrive at the same answer on a day neither of us has picked yet.

Two ways to handle a two-way account

✓Written

• Both totals exist before anybody subtracts
• Each entry carries its own date and rate
• The settlement day is fixed and never moves
• Both of you hold the same one-page copy

✕Adjusted in the head

• One large bill against forty small purchases
• A rate nobody said out loud before the work
• A settlement that only happens in an argument
• Two different answers to one simple question

That never happens, and the way it fails is predictable. The side that is easier to remember stays sharp, and the side made of many small pieces goes soft. His repair bill is one large event. Your side is forty packets of tea over eleven weeks. Guess which total gets rounded down when the two of you finally talk.

There is a second, quieter cost. While the account is "being adjusted", neither of you chases it. Money that nobody chases sits still, and a balance that sits still is the one most likely to become the year-old figure nobody wants to open.

And it damages the relationship you were trying to protect. The reason people say "we will adjust it later" is to avoid an awkward moment. All it does is move that moment later, and make it bigger.

Keep the two sides apart on paper

The rule is simple: every transaction is written on the side it belongs to, at the moment it happens, at the price agreed at that moment.

He takes goods from your shop. That goes on his side, exactly as it would for any customer, with the date and the amount. You take goods or work from him. That goes on your side, exactly as it would for any supplier, with the date and the amount.

Neither entry cancels the other when it is written. Cancelling comes later, once, on the settlement day.

Say the baker settles with you on the first of the month

Goods he took from your shop through the monthRs 9,400

Bread your family took from himRs 4,100

Bread he supplied for a wedding order you tookRs 2,100

Cash he paid you on the 18thRs 2,000

The only figure that changes hands on the 1stRs 1,200

In Wasoolo this maps cleanly, because a customer and a supplier are two different kinds of record. The same person can exist as both: his customer account carries what he owes you, his supplier account carries what you owe him, and each one shows its own history. You are never scrolling one list trying to work out which entries were his purchases and which were your bills.

Settle the difference on a fixed day

Pick a day. The first of the month, or the last Thursday, it does not matter as long as it never moves. An account with no settlement date is an account that only gets settled during an argument.

Then run the same four steps every time.

The settlement, in four steps that never change

1. 1Read his total out loud, then read yoursAgree both figures before anything is subtracted.
2. 2Work out the difference and say which way it pointsOne sentence, out loud, so nobody guesses.
3. 3Settle it in cash, or carry it as one dated lineNever as leftover half-cancelled entries.
4. 4Hand him a copy of both totals and the differenceSeconds to produce, and it ends a whole class of arguments.

Read both totals out loud, his side first. Agree the two figures before you subtract anything, because almost every dispute in this arrangement is about one of the two totals, never about the subtraction. Then work out the difference and say which way it points. Then settle it in cash, or write it forward as one line with today's date on it.

That last part matters. If Rs 3,200 is still owed after the settlement, it should exist as a single clean figure with a date, not as a leftover mess of half-cancelled entries. Next month you want to start from one number, not from an archaeology project.

Give him a copy of the two totals and the difference, every time. A one-page statement takes seconds and removes an entire category of future argument, which is why it is worth doing even with the man you have traded with for fifteen years. Especially with him, in fact, because that is the relationship you can least afford to damage.

The rate is where money quietly leaks

Here is the part shopkeepers miss, and it has nothing to do with record keeping.

When a man is both your customer and your supplier, there is a pull to be generous on both sides at once. You give him a keen rate on the goods he buys, because he is also the man who fixes your freezer. Then you accept his rate on the repair without a word, because he buys from you all month. Both feel like goodwill. Together they can quietly turn a profitable relationship into a loss-making one.

So price each side on its own merits, as if the other side did not exist. Ask yourself what you would charge a normal customer for those goods, and what you would pay a normal tradesman for that work. If your answer changes because of the other account, you are giving a discount twice and calling it friendship.

This is exactly the leak that never shows up in your daily takings and only appears when you sit down and work out what the shop actually earned. A relationship can be warm and still be priced properly. In most cases the other man is doing precisely that on his side.

When the two sides stop matching

Sooner or later you will sit down and the totals will not agree. Do not treat it as a crisis and do not treat it as dishonesty. Treat it as three ordinary possibilities.

The first is a missing entry, and it is by far the most common. Something got handed over during a rush and never got written. Compare dates rather than totals, find the gap, agree it, move on.

The second is a rate that was never fixed. He assumed one number, you assumed another, and no one said it out loud. The lesson is not about this bill, it is about the next one: agree the figure before the work starts, even roughly, even in one sentence.

The third is a genuine disagreement about what happened, and that is a different problem with its own answer, which is always the written record and never the louder voice.

One more thing worth watching. If his side of the account keeps growing while yours keeps getting settled in cash, that is not a two-way trading relationship any more, it is ordinary udhaar with extra steps. Nothing wrong with that, but it deserves the same ceiling and the same attention you would give any other name in your khata.

Common questions

We have traded like this for years without writing anything and it has been fine. Why change now?

It has been fine because the amounts stayed small and both of you had roughly the same picture. The day it goes wrong is the day one side jumps: a big repair, a big order, an illness, a son taking over the other shop. Writing it down costs you two minutes a week and it is worth exactly nothing until the moment it is worth everything.

Should I pay him in goods instead of cash when the difference is in his favour?

You can, and in a small market it is often the most sensible thing to do. Just write it as two entries rather than a swap: goods leaving your shop at your normal price, and that amount coming off what you owe him. Recorded as a vague swap, nobody can check it later. Recorded as two lines, both of you can.

He wants one combined balance instead of two separate ones. What do I say?

Show him the two totals on one page. That gives him the single number he wants, without either of you losing the detail underneath it. The single balance is a summary, not a record, and the moment you throw away the detail you have also thrown away your ability to answer any question about it.

What if he is my main supplier and I do not want to annoy him?

Frame it as protecting him, because it genuinely does. A written record is what stops you from asking him for money he has already given you. Say it in exactly those words. Most traders relax immediately, because they have been on the wrong end of a fuzzy account themselves at some point.

How often should we actually settle?

Monthly suits most small shops. Weekly is better if either side is large or moves fast, because small differences are easier to explain while the week is still fresh. What matters far more than the interval is that the date is fixed in advance and the same every time, so neither of you has to ask for it.

He is also a guarantor for another customer of mine. Does that change anything?

Keep it completely separate in your head and in your records. Standing behind somebody else's balance is a promise about a third person, and it should never be quietly netted off against what he owes you or what you owe him. Mixing the three is how one disagreement takes down all of them at once.