How Schedule C Expense Tracker works

Schedule C Expense Tracker is a small, self-contained tool for keeping track of the business expenses you'll deduct on IRS Schedule C (Form 1040). It's built for one job: turning a year's worth of business purchases into a clean, organized record you can hand to your accountant or use to fill out your return.

It is deliberately not a full accounting program. It doesn't track your income, connect to your bank, read your receipts automatically, or replace software like QuickBooks. It does one thing — deductible expense tracking — and tries to do it simply and well.

It's made for people who file a Schedule C: sole proprietors, freelancers, independent contractors, and single-member LLCs who report on a cash basis (you record expenses when you actually pay them). If you run a one-person business and you've ever scrambled at tax time to gather your deductions, this is built for you.

The whole app is a single file that runs inside your web browser. There's nothing to install, no account to create, and no subscription. You open the file, and it works.

• Nothing leaves your device. Everything you type stays on your own computer, in your own browser. It is never uploaded anywhere.
• It works offline. Once the file is on your computer, you don't need an internet connection to use it.
• No sign-up. There's no login, no email, no password.

The trade-off for that privacy is that you are in charge of keeping your data safe — which mostly means backing up now and then. The backup and file-handling sections below cover exactly how.

The first time you open the app, you'll create a business — just a name for the venture you're tracking (for example, "Jane's Design Studio"). Everything you record afterward belongs to that business. If you run more than one, you can add others and switch between them; see More than one business.

The main screen has a few consistent parts:

• The top bar shows which business and tax year you're in, and your running total deductible amount for the year.
• The Summary strip shows your totals broken down by Schedule C category, so you can see at a glance where your deductions are concentrated.
• The expense table is the heart of it — each row is one expense, grouped under its IRS category.
• The icons down the side open panels for adding expenses, vendors, receipts, reports, backups, business settings, and themes.

To record a purchase, you fill in a short form: the date, the Schedule C category it belongs to (Advertising, Supplies, Meals, and so on — these match the official IRS lines), the vendor you paid, a brief description, the business purpose, and the amount (with tax as a separate field if you want it).

Picking the right category is the one judgment call. The categories mirror IRS Schedule C, Lines 8 through 30. If you're unsure which line an expense belongs on, note your best guess and confirm with your accountant — see the disclaimer.

Each expense has two percentage settings that decide how much of it actually counts as a deduction. They sound similar but do different jobs:

• Business Use % — how much of this particular purchase was for business. If you bought a laptop you use 80% for work and 20% for personal things, you'd set this to 80%. You decide it based on real use.
• IRS cap (Deductible %) — a ceiling the tax law puts on a whole category, no matter how you used the item. The classic example is meals: even a 100%-business meal is generally only 50% deductible. The app applies the right cap for the category.

Your deductible amount is simply the price (plus tax) trimmed by both percentages:

When an expense has actually been reported on a tax return, you can mark it as filed (you'll see it flagged "On Return" / "Recorded"). This is just a status so you can tell, later, what's already been accounted for and what hasn't. It doesn't change the numbers.

If an expense was entered by mistake, returned, or simply shouldn't count, you can void it instead of deleting it. A voided row stays visible (struck through) but counts as zero toward your totals — so you keep the paper trail without inflating your deductions. You can restore a voided row at any time. Deleting, by contrast, removes it for good.

Sometimes several expenses belong together — one shopping trip with items across categories, say. You can group related rows under a shared name so they read as a set, while each item still lands on its correct Schedule C line and counts individually.

You can attach one or more receipt images or PDFs to any expense. A small paperclip with a count shows which rows have receipts. Attaching proof to each deduction is exactly what makes your records audit-ready.

When you attach a receipt, the app gives it a tidy, consistent filename built from the date, vendor, and a short description — for example 2026-0403-Amazon-MacBookProCase-K7M.jpg. The little code at the end keeps every receipt unique. You don't have to do anything; it's named for you so the files make sense if you ever look at them outside the app.

All of a business's receipts live in a library you can browse, with previews for both images and PDFs. When you attach a receipt to an expense, you pick from this library, so the same receipt can be found and reused easily.

To save typing, the app keeps a list of the vendors you pay. There are two kinds:

• Your business's own vendors — names specific to one business.
• Shared common payees — a built-in list of the names almost everyone uses (Amazon, USPS, FedEx, Google, and so on) that's available to every business.

You can add, rename, or retire vendors, and promote one of your own up to the shared list. Renaming a vendor updates it everywhere it's used.

If you have several ventures, you can keep each as its own business inside the app and switch between them from the top bar. Their expenses, vendors, and receipts stay completely separate — nothing from one business bleeds into another.

Expenses are organized by tax year. You can move between years to enter or review a particular year's deductions, and your records for past years stay intact.

The Summary gives you per-category totals and a sense of progress at a glance — how much you've recorded on each Schedule C line, and what's still unaccounted for. It's the quickest way to sanity-check a year before you file.

Your records are yours, and there are several ways to take them out of the app:

• CSV — a spreadsheet-ready file you can open in Excel, Numbers, or Google Sheets.
• PDF — a clean, CPA-ready PDF produced through your browser's print dialog (choose "Save as PDF"), or a hardcopy to your printer.
• Markdown report — a plain-text, readable summary that opens in any text editor.
• HTML report — a self-contained web-page report that opens in any browser, found under Reports. Turn on its Include receipts option and it saves as a .zip instead, pairing the report with all your receipts, sorted into folders by Schedule C line (ideal for your accountant — see below).
• Backups — a year backup or a full archive of everything; see Backing up.

This is what the Export HTML report option is built for — find it under Reports, and turn on Include receipts before you export. You'll get a .zip containing a single report plus a receipts folder, and within it one folder per Schedule C line — for example 08_Advertising, 22_Supplies, 23_Taxes_and_Licenses — each holding the receipts for that line. Your accountant can open the report and find every backing receipt in the place they'd expect it, with no explanation needed.

Everything you enter is saved in your web browser's own private storage, on the one device you're using. Think of it as the browser quietly remembering everything tied to that app file. It is not a document sitting in your Documents folder, and it is not on any company's server.

That's what makes the app so private — but it also means your records are linked to this browser, on this computer. The next two points matter because of that.

Because your data lives only in your browser, a backup is your safety net. The app offers two:

• Year backup — a single sealed file (.spbckup) holding one business's expenses for one tax year, plus every receipt they reference. It's per business, so each business's years are backed up separately.
• Full archive — one sealed file (.sparch) capturing everything: all businesses, all years, all vendors, all receipts. This is your disaster-recovery copy.

You can validate a backup to confirm it's complete and readable before you rely on it, and restore from one to bring your data back. The app will gently remind you when a backup is overdue. A good habit: a full archive whenever you've done meaningful data entry, kept somewhere safe (cloud drive, external disk, or just another folder).

Because data doesn't follow the file by itself, moving to a new computer (or a different browser on the same computer) is a backup-and-restore job: make a full archive on the old setup, copy both the app file and the archive over, open the app, and restore. The same applies if you switch from, say, Chrome to Firefox — each browser keeps its own separate storage.

Clearing your browser's history, cache, or site data — or using private/incognito mode — can erase the app's stored records along with everything else, because they live in that same browser storage. If you regularly clear browsing data, be especially diligent about keeping a current full archive, and avoid using private/incognito windows for real data entry.

Out of the box, the app includes three looks — Default Light, Default Dark, and Grayscale — so you can choose what's comfortable. Themes are purely cosmetic: switching never touches your expenses, receipts, or anything else.

If you'd like more variety or a palette of your own, Steagus Publishing offers Theme Skinner — a free companion tool for designing themes. It ships with a couple dozen built-in themes you can:

• use exactly as they are,
• adjust as a starting point, or
• set aside and build a brand-new theme from scratch.

When you're happy with it, Skinner exports your theme as a small .spskin file. Open Schedule C Expense Tracker's Theme Library, import that file, and your new look is applied — appearance only, your data untouched.

There is no tracking, no analytics, no advertising, and no account. The app makes no network connections to send your information anywhere — your financial records never leave your device. The only data that exists is the data you enter, and it stays with you.

Schedule C Expense Tracker is a record-keeping tool, not tax advice. It organizes your expenses and applies the math, but it can't know the specifics of your situation. Category choices, special cases (like listed property, multi-year prepaid expenses, mixed-use items, or Section 179), and anything you're unsure about should be confirmed with a qualified tax professional before you file. When in doubt, leave it blank and ask your CPA.