Few things feel worse in an accounting exam than reaching the end of a statement of financial position or trial balance. The two sides do not agree. The instinct is to panic and start again.
A few self-checks can tell you what kind of error you are looking for, and often lead you straight to it. It is just as important to know when a difference is small enough to leave, so you do not give up the rest of the paper chasing it.
Start with the size of the difference
Before hunting at random, work out the exact difference between the two totals. The difference is a clue, because many errors leave a tell-tale mark in that number.
A large, recognisable figure may equal a whole item you can search for. A small, awkward one often points to swapped digits or an addition slip.
Write the difference down and ask what kind of mistake could produce exactly that amount. Do not re-check everything blindly.
Say your debit column totals RM84,600 and your credit column totals RM84,240. The difference is RM360. Before you touch a figure, that number tells you something.
It is even, so a wrong-side entry of RM180 is possible. And 360 divides exactly by nine, so swapped digits are possible too.
One difference can point to more than one type of error, which is why you run the checks in order and do not guess.
Divisible by nine: swapped digits
If the difference divides exactly by nine, suspect a transposition: two digits swapped when a figure was copied. Writing 54 as 45, or 720 as 270, always gives a difference that is a multiple of nine.
When your difference passes the test, scan your figures for a number whose digits you may have reversed. Check especially any figure carried forward from a working or an earlier part.
Say you meant to enter rent as RM1,890 but wrote RM1,980. The difference is RM90, a multiple of nine, and the swapped pair of digits (89 became 98) created it.
The clue also hints at scale. A difference of RM90 suggests digits in the tens and hundreds places swapped, and a difference of RM900 points to a swap further along the number.
Halve an even difference: a wrong-side entry
If a figure is entered on the wrong side, it does double damage. It is missing from the side it belongs on and wrongly added to the other side. So the difference equals twice that figure, and it is even.
When your difference is even, halve it and look for an item of that exact value on the wrong side.
Say an expense of RM1,200 was posted to the credit column when it belongs in the debit column. The two sides now differ by RM2,400, twice the figure, because RM1,200 is missing from one side and extra on the other.
Halving RM2,400 sends you straight to a RM1,200 item. Once you find it in the wrong column, the fix is a single move.
Look for a figure equal to the whole difference
Sometimes the difference equals one item exactly. That usually means the figure was left out of one side, or entered once when it should appear on both. Scan your statement for an amount identical to the full difference.
If you find it, check that it sits in the right place and, where double entry needs it, on both sides. An omitted balance is easy to fix once you know its size.
For example, suppose the difference is exactly RM5,000 and is not obviously double any figure. Often a whole balance never reached the statement, such as a loan, a provision or closing inventory of RM5,000.
Re-add every column carefully
Never assume the totals are right. A simple addition error is a common reason a statement does not balance, and it hides in plain sight. Re-add each column slowly, ideally from bottom to top, so you do not repeat the same path and the same mistake.
Tick each figure as you go. Confirm the arithmetic before you suspect anything more unusual.
Two common mix-ups
First, dividing by nine is a test for swapped digits, not proof. Plenty of differences that are multiples of nine come from ordinary addition slips.
The clue narrows your search but does not name the error. Do not force a transposition onto a difference just because the arithmetic allows it.
Second, an even difference does not always mean a wrong-side entry. Two separate errors, or a simple mis-addition, can also land on an even number. Use each clue as a place to start looking, then confirm what you actually find.
Know when to move on
Set yourself a limit. If a couple of minutes of these checks has not found the error, and the difference is small, stop. Rule off, note your figures and move on to the marks waiting elsewhere.
Follow-through marking can still reward correct steps even when one figure is off. A small imbalance you cannot find is not worth the marks you would lose by running out of time.
If a stubborn difference trips you up every time, one of our teachers can show you how to run these checks quickly and calmly. We also cover how to judge when to let a small difference go. Book a trial class.