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Simple Record Keeping for Pokemon Business: Track Inventory & Sales

9 min readBy Break Check Barragan

Learn why tracking Pokemon purchases and sales is critical. Set up simple record-keeping systems using spreadsheets, apps, and proven organizational methods.

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Simple Record Keeping for Pokemon Business

"I think I made money this month?" If you're not sure, you don't have a business—you have an expensive hobby. Let me show you dead-simple record keeping that actually works.

Why Track Everything?

Three compelling reasons:

1. Legal Reasons: Taxes and Business Expenses

IRS requirement: Track all business income and expenses

What happens if you don't:

  • Can't deduct business expenses (lose money)
  • No proof of income/expenses if audited (huge problems)
  • Pay taxes on revenue instead of profit (overpay taxes)

What happens if you do:

  • Deduct shipping, supplies, mileage (save money)
  • Prove expenses if audited (protected)
  • Pay taxes only on profit (pay correct amount)

Example: $10,000 revenue - $4,000 expenses = $6,000 taxable profit Without tracking: Pay taxes on $10,000 With tracking: Pay taxes on $6,000 Tax savings: ~$1,000

2. Business Reasons: Knowing What's Profitable

Questions tracking answers:

  • Which cards make the most profit?
  • Which sourcing methods work best?
  • What's my average profit margin?
  • Am I actually making money?

Without tracking: Guessing With tracking: Knowing

My story: Year 1, I thought I made $2,000. After tracking, actual profit was $700. Tracking showed me which cards were secretly losing money.

3. Personal Reasons: Not Losing Money or Inventory

Common scenarios without tracking:

  • "Did I already sell this card?"
  • "What did I pay for this?"
  • "Where is that $200 card I bought?"
  • "How much do I have in inventory?"

All preventable with simple systems.

What Happens When You Don't Track

Real example from student:

  • Bought $5,000 in Pokemon cards over 6 months
  • Sold cards "here and there"
  • No tracking whatsoever
  • Thought he made money
  • Actual result: Lost $800

Why? Couldn't remember what he paid, sold cards below cost, lost inventory to disorganization.

Tracking would have prevented this.

Simple Tracking Methods

Method 1: Basic Spreadsheet (My Recommendation)

Setup time: 15 minutes Maintenance: 5 minutes per day Cost: Free

Columns you need:

  • Date purchased
  • Card name
  • Set
  • Condition
  • Purchase price
  • Date sold
  • Sale price
  • Fees
  • Shipping cost
  • Net profit

Formula for profit: =Sale price - Purchase price - Fees - Shipping

Download: I provide free template in course

Method 2: Inventory Apps

Good options:

  • TCGPlayer Seller App (if selling on TCGPlayer)
  • Card Binder (inventory management)
  • Google Sheets (free, cloud-based)

Pros: Mobile access, some automation Cons: Learning curve, subscription costs

My usage: Spreadsheet for tracking, app for quick inventory lookups

Method 3: Hybrid System (Advanced)

What I actually use:

  • Spreadsheet for financial tracking
  • Photos in organized folders for inventory documentation
  • Physical filing system for receipts
  • Cloud backup of everything

Why hybrid? Best of all worlds, redundancy prevents loss

Setting Up Your Tracking System (Step-by-Step)

Step 1: Choose Your Tool

Start with: Free Google Sheets spreadsheet Why: No cost, accessible anywhere, easy to learn

Step 2: Create Your Template

Essential tabs:

  • Inventory (cards you own)
  • Sales (cards you've sold)
  • Expenses (business costs)
  • Summary (profit/loss calculation)

15 minutes to set up once, saves hours forever

Step 3: Establish Daily Routine

Every day (5 minutes):

  • Log any purchases
  • Log any sales
  • Update inventory status
  • File receipts

Every week (15 minutes):

  • Review what sold
  • Calculate weekly profit
  • Plan next week's listings

Every month (30 minutes):

  • Run profit/loss report
  • Review best/worst performers
  • Adjust strategy

Step 4: Photo Documentation for Valuable Cards

For cards $20+:

  • Front photo
  • Back photo
  • Close-up of any flaws
  • Photo of purchase receipt

Why? Insurance, condition disputes, resale documentation

Storage: Organized folders by month/set

Simple Filing System for Receipts

Physical receipts:

  • Monthly accordion folder
  • Label by month
  • Keep for 7 years (IRS requirement)

Digital receipts:

  • Email folder "Pokemon Business Receipts"
  • Organized by month
  • Cloud backup

Pro tip: Photograph physical receipts (receipts fade)

Daily vs Weekly Tracking Routines

Daily Routine (5 minutes)

Morning:

  • Check for overnight sales
  • Log any sales from previous day
  • Update inventory

Evening:

  • Log any purchases made
  • File receipts
  • Update tracking sheet

Consistency > Perfection

Weekly Routine (15 minutes)

Sunday evening:

  • Review week's sales
  • Calculate weekly profit
  • Identify best sellers
  • Plan next week's listings
  • Update inventory counts

Why weekly? Catches errors while memory is fresh

Common Record Keeping Mistakes

Mistake 1: Waiting Too Long to Record

Bad: Record transactions once per month Problem: Forget details, lose receipts, make errors

Good: Record within 24 hours Result: Accurate, complete records

Mistake 2: Incomplete Information

Bad: "Sold Charizard - $50" Problem: Which Charizard? Which set? What condition? What fees?

Good: "Sold Base Set Charizard Holo NM - $50 sale, $7 fees, $3 shipping = $40 net" Result: Complete data for analysis

Mistake 3: No Backup System

Real story: Student's laptop crashed, lost entire year of records

Fix: Cloud-based tracking (Google Sheets, Dropbox, OneDrive)

Mistake 4: Overcomplicating It

Don't:

  • Track every penny obsessively
  • Create 50-column spreadsheets
  • Use complex accounting software day one

Do:

  • Track essentials: buy price, sell price, fees
  • Keep it simple
  • Upgrade later if needed

Mistake 5: Mixing Personal and Business

Bad: Personal Pokemon collection in same spreadsheet as business inventory Problem: Confused records, tax issues

Good: Separate tracking for business vs personal Result: Clean records, clear taxes

Sample Tracking Entry

Purchase:

  • Date: 11/06/2025
  • Card: Charizard ex (Scarlet & Violet Base #6)
  • Condition: Near Mint
  • Source: eBay
  • Purchase Price: $8.50
  • Shipping: $1.00
  • Total Cost: $9.50

Sale:

  • Date Sold: 11/10/2025
  • Platform: Mercari
  • Sale Price: $15.00
  • Mercari Fee: $1.50
  • Shipping Cost: $1.25
  • Net Revenue: $12.25
  • Profit: $2.75

Time to record: 90 seconds

When to Upgrade Your System

Start with: Basic spreadsheet

Upgrade when:

  • Selling 100+ cards per month
  • Managing inventory over 500 cards
  • Needing real-time inventory updates
  • Multiple people need access
  • Tax complexity increases

My progression:

  • Year 1: Simple spreadsheet
  • Year 3: Advanced spreadsheet with formulas
  • Year 5: Hybrid system with inventory app
  • Year 7: Custom database

Don't overcomplicate early. Simple works.

Tools I Actually Use

Tracking: Google Sheets (free, cloud-based) Photos: Google Photos (organized albums by month) Receipts: Dropbox folder + physical accordion file Backup: Automatic cloud backup

Total cost: $0 per month

The Bottom Line

Record keeping isn't exciting, but it's essential.

5 minutes per day prevents:

  • Lost money
  • Lost inventory
  • Tax problems
  • Business confusion

5 minutes per day enables:

  • Accurate profit tracking
  • Tax deductions
  • Smart business decisions
  • Stress-free audits

The successful Pokemon sellers I know? They all track meticulously.

Ready to Set Up Your Tracking System?

This is Module 2.2 of Week 2 in the Pokemon Business Startup Course.

Complete course includes:

  • Ready-to-use tracking spreadsheet template
  • Photo organization system
  • Receipt filing checklist
  • Video walkthrough of setup

Enroll in the Pokemon Business Startup Course →


Module 2.2 of Week 2 - Pokemon Business Startup Course

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