After enough conversations with business owners in their first few years, the same problems keep surfacing. Not big, dramatic errors. Small habits that quietly make tax time harder than it needs to be.
Here are the five that come up most often, and what to do about each one.
1. Running personal and business money through the same account
This is the one that causes the most work later. When groceries, gas and a client payment all land in the same account, every single transaction has to be sorted by hand at year end. You end up trying to remember whether a purchase from eight months ago was for the business or not.
The fix is a separate business chequing account, even if you are a sole proprietor and not legally required to have one. Run business income in and business expenses out. Pay yourself by transferring money to your personal account, which gives you one clean line to categorize instead of two hundred messy ones.
If you are incorporated, this is not optional. Mixing funds undermines the separation between you and the corporation.
2. Keeping receipts but not attaching them to anything
Plenty of owners keep every receipt. The problem is that the receipts live in one place, usually a shoebox or a glovebox, and the transactions live somewhere else entirely. Matching them up becomes a weekend project.
The Canada Revenue Agency expects you to keep supporting documents for six years from the end of the tax year they relate to, and a credit card statement on its own is generally not enough. The statement shows an amount. The receipt shows what you actually bought and how much GST was charged.
The fix is to attach the receipt to the transaction at the moment you make the purchase. Most bookkeeping software has a phone app that lets you photograph the receipt and attach it in about fifteen seconds. Do it in the parking lot, not in April.
3. Inventing categories as you go
Left to itself, a chart of accounts sprawls. You end up with Supplies, Office Supplies, Materials and Shop Supplies, all holding a bit of the same thing. Reports built on that structure cannot tell you anything useful, because the number you want is spread across four lines.
The fix is to decide on your categories once, deliberately, and then stop adding to them. A small service business rarely needs more than twenty or thirty accounts. Fewer categories, used consistently, beat many categories used loosely.
It is worth thinking about what you want the categories to tell you. If knowing your software and subscription spend would change a decision, give it its own line. If you will never look at it separately, fold it into office expenses.
4. Not watching the GST threshold
In Canada you stop being a small supplier once your worldwide taxable revenue passes $30,000. That test is not annual. It runs at the end of each calendar quarter, looking back across the previous four consecutive quarters.
There is a second version of the test that catches people off guard. If you pass $30,000 inside a single calendar quarter, you stop being a small supplier immediately, on the day of the sale that took you over. You have to charge GST on that sale and everything after it, and you have 29 days to register.
That means one large project in a quiet year can trigger registration. GST in Alberta is 5 percent. If you did not charge it and you should have, the CRA still expects it, and it comes out of money you have already spent.
The fix is a reminder in your calendar on the last day of March, June, September and December to add up the previous four quarters. It takes two minutes and removes the risk entirely.
5. Treating bookkeeping as a year end task
The most expensive habit is leaving everything until the accountant asks. Twelve months of unsorted transactions is a genuinely large job, and it always arrives at the same time as everything else.
It also means you spend the year without knowing where you stand. Owners who do their books monthly can tell you what they earned last quarter and roughly what they owe. Owners who leave it are guessing, and usually guessing high.
The fix is a repeating appointment with yourself. One to two hours a month is enough for most small service businesses once the system is set up properly. Categorize what came in, attach anything missing, reconcile against the bank statement, and set aside the GST you collected.
Where to start
If more than two of these sound familiar, the issue is usually not discipline. It is that the system was never set up properly in the first place, so staying on top of it takes more effort than it should.
That is what the DIY Bookkeeping Setup and Training Package is for. The setup gets done properly once, you learn how to run it, and you keep the system.
This article is general information, not tax advice. Confirm your own situation with the CRA or your accountant, since thresholds and rules do change.
