Common receipt-keeping mistakes (and how to avoid them)

Patterns repeat. The same handful of mistakes show up over and over, and they're all easy to fix once you've seen them named.

Mistake 1: Trusting the bank statement

"I'll just look at my bank statement at tax time" is the receipt-keeping equivalent of "I'll start dieting on Monday". The ATO has been increasingly explicit that bank statements alone don't cut it for substantiating deductions over $300 — you need actual receipts or tax invoices showing what was bought, not just that money moved.

The fix: capture the receipt itself, not the bank line. The bank line is supporting evidence at best.

Mistake 2: Categorising once a quarter

The "I'll batch-process these on Sunday" approach fails for the same reason batch dishes fails: it never happens, and when it does it takes four times longer than the in-the-moment version. By the time you sit down to it, you've forgotten which conference the $310 receipt was from.

The fix: categorise on the day. Three seconds per receipt becomes zero on aggregate.

Mistake 3: Over-engineering the category list

Day-one taxonomies with 30 categories nested across four parent groups are abandoned by week three. The reason: every receipt forces a decision, and decisions cost.

The fix: start with five or six categories, let the list grow when you actually feel the pinch. The version that survives the year was built by use, not designed in advance.

Mistake 4: Forwarding receipts but never tagging them

You set up the auto-forward rule, congratulate yourself, and never look at rct-keep again until tax time. When you do, there are 800 uncategorised receipts and the existential dread is real.

The fix: 10 minutes a week. Open the inbox view, walk down the list, give everything a category. It's the gym version of receipt-keeping — small consistent reps beat one massive session.

Mistake 5: Throwing out the original

You've photographed the paper receipt; surely the paper itself can go in the bin? Mostly yes. But for big-ticket items where the warranty period extends past five years, keep the paper too — some warranty claims still want the original, and the cost of holding onto a folded receipt is zero.

The fix: a single envelope in a drawer for warranty originals over $500. Bin everything else once it's photographed.

Mistake 6: Trying to be too clever about cash receipts

Cash receipts (Aldi, the local cafe, the school cake stall) are the hardest to capture because there's no email and the paper is small and crumbly. People spend a lot of energy building elaborate systems for them, then quietly stop.

The fix: photograph it on the spot or skip it. Yes, you'll miss some. The few cash receipts you forget are not worth the cost of a system that fails entirely. Better to capture 95% of receipts reliably than 100% on paper.

One bonus mistake: deleting "duplicates" too aggressively

The duplicate detector is good, but it isn't perfect. A vendor sometimes sends a receipt and a tax invoice as two separate emails for one purchase — those aren't duplicates, they're complementary. The receipt is the casual record; the tax invoice is the formal one. Keep both, and tag them as a pair if you want them linked.

This works even better inside Receipt Keep — start a 14-day free trial.