Landscaping business. Small. Just my husband and two guys. He pays suppliers, does quotes, fixes equipment, actually does the work. Invoices pile up.
I asked to look at his books for taxes. Found something weird.
THE EIGHT MONTH MISTAKE
One supplier charged different prices for the same mulch deliveries. Same product. Same quantity. Different prices.
January: $340 for 10 yards
March: $380 for 10 yards
May: $340 for 10 yards
July: $395 for 10 yards
Nobody noticed because nobody was checking. Invoices came in, got paid, got filed. Total overcharges across all suppliers over 8 months: $1,847.
Not huge money. But not nothing either.
THE SIMPLE FIX I BUILT
Still learning n8n so this took me two weekends. Definitely could be done faster by someone who knows what they're doing.
Supplier invoices arrive via email. Workflow grabs the PDF attachment. Extracts vendor name, item descriptions, quantities, unit prices, totals.
Logs everything to a spreadsheet. Same item from same vendor now shows price history. Easy to spot when something changed.
Added simple math checking too. Line items added up. Subtotal plus tax equals total. Catches errors vendors make.
Anything weird gets flagged for his review. Everything else just logs.
THE DIFFERENCE NOW
Before: Pay whatever invoice says, find errors during tax prep, argue with vendors months later when they don't remember.
After: Price changes visible immediately, math errors caught before payment, conversations happen while vendors still have context.
Called the supplier about the price fluctuations. Turns out their system was applying wrong customer tier sometimes. Fixed it.
Small wins add up. This one took me maybe 12 hours to build including all my learning mistakes. Caught enough in 3 months to make it worth it.
What repetitive paperwork are you not checking closely enough?