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# Bookkeeping for Small Business: A Simple System for Trades Owners

Simple bookkeeping for small business owners who'd rather be working: what to track, a 15-minute weekly routine, receipts, and when to hire help.

GB The GBPN team · October 14, 2026 · 4 min read

On this page

1.  [Why bother?](#why-bother)
2.  [Step one: separate your money](#step-one-separate-your-money)
3.  [What to track](#what-to-track)
4.  [How long to keep records](#how-long-to-keep-records)
5.  [Pick a simple tool](#pick-a-simple-tool)
6.  [The 15-minute weekly routine](#the-15-minute-weekly-routine)
7.  [Common mistakes to avoid](#common-mistakes-to-avoid)
8.  [One flat bill helps](#one-flat-bill-helps)
9.  [A business number with one flat price](#a-business-number-with-one-flat-price)
10.  [FAQ](#faq)

You didn’t start a business to do paperwork. So the receipts go in the truck’s door pocket, the invoices live in your texts, and April turns into a week of panic.

Bookkeeping doesn’t have to be a big thing. It’s just writing down money in and money out, on a schedule, so nothing piles up.

This isn’t tax advice. Tax rules depend on your situation, so check with an accountant or tax preparer.

## Why bother?

-   **You’ll know if you’re actually making money.** Busy isn’t the same as profitable.
-   **Taxes get easier and cheaper.** You can’t deduct expenses you can’t prove.
-   **No surprise tax bill.** The IRS says that if you’re in business for yourself, you [generally need to make estimated tax payments](https://www.irs.gov/businesses/small-businesses-self-employed/estimated-taxes) during the year. Good books tell you how much.
-   **You’re ready if anyone asks.** A bank, a lender, or the IRS.

## Step one: separate your money

This is the single biggest thing you can do. Open a [business bank account](https://gbpn.com/blog/business-bank-account-for-llc/) and run everything through it. Get a business card and use it only for the business.

When every business dollar goes through one account, half of your bookkeeping is already done. Your bank statement becomes your record.

## What to track

**Money in:**

-   Every payment, who it’s from, and which invoice it’s for.
-   Keep your [invoices](https://gbpn.com/blog/contractor-invoice-template/) numbered so you can match them up.

**Money out:**

-   Materials and supplies
-   Fuel and vehicle costs (or mileage, ask your accountant which method fits you)
-   Tools and equipment
-   Insurance, licenses, and permits
-   Phone and software
-   Subcontractors and any help you pay
-   Advertising, like flyers and your website

**Receipts:** snap a photo the moment you get one. Phone photos in a dedicated album or folder are fine. Most bookkeeping apps can store them too.

## How long to keep records

The [IRS](https://www.irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records) says to keep records that support your tax return until the period of limitations runs out. For most people that’s **3 years** after you file, but it can be longer in some situations, and employment tax records should be kept for at least 4 years. When in doubt, keep them longer. Digital copies don’t take up space.

## Pick a simple tool

Any of these work. The best one is the one you’ll actually use.

-   **A spreadsheet:** free, simple, fine for one person with a handful of jobs a week.
-   **Bookkeeping software:** connects to your bank, sorts transactions, sends invoices. Worth it as you grow.
-   **A bookkeeper:** if you hate this, paying someone for a few hours a month is often money well spent.

## The 15-minute weekly routine

Pick a time, like Friday afternoon or Sunday night, and do this every week:

1.  **Log every payment that came in** and mark those invoices paid.
2.  **Check for unpaid invoices** and send a friendly reminder (there’s a copy-and-paste one in our [invoice guide](https://gbpn.com/blog/contractor-invoice-template/)).
3.  **Match receipts** to the week’s business card and bank charges.
4.  **Label anything unclear** while you still remember what it was.
5.  **Move tax money** into a separate savings account. Ask your accountant what percentage makes sense for you.

**Once a month:** look at total money in, total money out, and what’s left. That’s your profit.

**Once a quarter:** check whether you need to make an estimated tax payment.

## Common mistakes to avoid

-   **Mixing personal and business spending.**
-   **Paying yourself randomly.** Transfer a set amount on a schedule instead.
-   **Waiting until tax season.** Twelve months of receipts is a nightmare. One week is easy.
-   **Forgetting small expenses.** They add up over a year.
-   **Not tracking what’s owed to you.** Unpaid invoices are money you already earned.

## One flat bill helps

Predictable expenses make bookkeeping easier. Your phone bill is a good example. If business calls run through your personal cell, splitting that bill for taxes is a guessing game.

A [separate business number](https://gbpn.com/blog/separate-business-phone-number/) gives you a clear business expense and a separate call history.

## A business number with one flat price

**GBPN** is **$30 a month total, taxes and fees included.** It’s the same every month, so it’s easy to budget and easy to book. You get a business number that rings the cell you already carry, a greeting we record for you, and business hours so after-hours calls go to voicemail.

A real person sets it up with you. **30-day money-back guarantee.**

### [See available business numbers](https://gbpn.com/get-started/?source=blog-bookkeeping-for-small-business)

## FAQ

**Can I do my own bookkeeping?** Yes. With a separate bank account and a weekly routine, many owners do. Hire help when it starts taking too much time.

**What’s the difference between bookkeeping and accounting?** Bookkeeping is recording money in and out. Accounting uses those records for taxes, planning, and reports.

**How often should I do bookkeeping?** Weekly is the sweet spot. It takes minutes instead of days.

**What expenses can I deduct?** Generally, ordinary and necessary business expenses. Rules have details and limits, so ask a tax professional.

**How long should I keep receipts?** The IRS says generally 3 years after filing for most records, longer in some cases. Many owners keep them longer to be safe.

GB

Written by the GBPN team

We're a family-owned company that has set up business phone numbers for small businesses since 2017. We write these guides from what we hear from owners every day.

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On this page

1.  [Why bother?](#why-bother)
2.  [Step one: separate your money](#step-one-separate-your-money)
3.  [What to track](#what-to-track)
4.  [How long to keep records](#how-long-to-keep-records)
5.  [Pick a simple tool](#pick-a-simple-tool)
6.  [The 15-minute weekly routine](#the-15-minute-weekly-routine)
7.  [Common mistakes to avoid](#common-mistakes-to-avoid)
8.  [One flat bill helps](#one-flat-bill-helps)
9.  [A business number with one flat price](#a-business-number-with-one-flat-price)
10.  [FAQ](#faq)

GBPN

A business number on the phone you already have.

$30/mo total

Taxes included. Set up for you.

-   ✓ We record your greeting
-   ✓ Business hours and voicemail to text
-   ✓ 30-day money-back guarantee

[See available numbers →](https://gbpn.com/get-started/?source=blog-sidebar-bookkeeping-for-small-business)

## Keep reading

[All guides →](https://gbpn.com/blog/)

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    Read the guide →
    
    ](https://gbpn.com/blog/business-bank-account-for-llc/)
-   [
    
    Bookkeeping & Money 4 min read
    
    ### Contractor Invoice Template: What to Include So You Get Paid Faster
    
    A simple contractor invoice template you can copy, plus what every invoice needs, payment terms that work, and a polite reminder text for late payers.
    
    Read the guide →
    
    ](https://gbpn.com/blog/contractor-invoice-template/)
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    Starting a Business 5 min read
    
    ### LLC vs Sole Proprietor: Which One Makes Sense for a Contractor?
    
    LLC or sole proprietor? A plain-English look at liability, taxes, cost, and paperwork for contractors and home-service owners just getting started.
    
    Read the guide →
    
    ](https://gbpn.com/blog/llc-vs-sole-proprietor/)