Know your categories before tax time
BillingMart suggests the tax category of every bill, expense and invoice, and you confirm each one. When you do your taxes, the answer is already there.
A suggestion, not tax advice. Check your categories with your accountant.
How it works
Free where it can be, AI where it has to be, yours to confirm
A suggestion never changes a record on its own.
- 1
It looks at what it already knows
A default you set for a vendor or a customer, the category you chose last time for the same payee, and — on an invoice — whether every line is charged by time or by the unit. These cost nothing.
- 2
AI only when it has to
When none of that decides, the record’s payee, memo and amount are read by AI and it proposes one category with a short reason. That uses AI credits, like every other AI feature.
- 3
You confirm
A suggestion is a draft beside the record. Nothing is categorised until you accept it or pick another — one at a time, or review them as a list. An assistant you connect can suggest and ask; you approve.
- 4
Ready at tax time
A report totals each category per period and currency: money out by expense category, money in by income category without the sales tax you collected, and what is still uncategorised.
The categories
The lines of IRS Schedule C
Edition us-sch-c-2026, for a US sole proprietor or single-member LLC. Each category keeps its form line, so the totals map straight onto the form.
Money out
- AdvertisingLine 8
Ads, signs, business cards, website promotion and marketing costs.
- Car and truck expensesLine 9
Fuel, parking, tolls and upkeep of a vehicle used for the business.
- Commissions and feesLine 10
Sales commissions, platform and payment-processing fees.
- Contract laborLine 11
Payments to independent contractors and freelancers who are not employees.
- DepletionLine 12
Depletion of natural resources such as timber, oil or minerals.
- Depreciation and section 179Line 13
Writing off the cost of equipment or property over time, or section 179 expensing.
- Employee benefit programsLine 14
Health, accident and other benefits paid for employees (not for the owner).
- Insurance (other than health)Line 15
Business liability, property, vehicle and similar insurance premiums.
- Interest: mortgageLine 16a
Mortgage interest on business property.
- Interest: otherLine 16b
Interest on business loans, credit cards and lines of credit.
- Legal and professional servicesLine 17
Lawyers, accountants, bookkeepers, consultants and tax preparation.
- Office expenseLine 18
Postage, printing, software subscriptions and everyday office items.
- Pension and profit-sharing plansLine 19
Contributions to retirement plans for employees.
- Rent or lease: vehicles, machinery, equipmentLine 20a
Renting or leasing a vehicle, machine or equipment for the business.
- Rent or lease: other business propertyLine 20b
Renting an office, shop, storage unit or other business space.
- Repairs and maintenanceLine 21
Fixing or maintaining business equipment, tools and premises.
- SuppliesLine 22
Materials and supplies used up in the work and not held as inventory.
- Taxes and licensesLine 23
Business licenses, permits, registration fees and payroll or property taxes.
- TravelLine 24a
Flights, hotels, rental cars and other travel away from home for the business.
- MealsLine 24b
Business meals (only part is deductible; the form applies the limit).
- UtilitiesLine 25
Electricity, gas, water, internet and phone for the business.
- WagesLine 26
Pay to employees (not the owner and not contractors).
- Business use of homeLine 30
The business share of home costs for a space used regularly for work.
- Other expensesLine 27a
A business cost that fits none of the other lines.
- Cost of goods sold: purchasesPart III
Goods bought to resell, and materials that become part of what is sold.
- Equipment or asset purchase
A larger purchase kept and used for years (a vehicle, machine or computer); it is usually written off through depreciation.
- Personal or not deductible
A personal cost, or one that is not a business expense.
Money in
- Sales of goodsLine 1
Gross receipts from selling products.
- ServicesLine 1
Gross receipts for work done: labor, time, consulting, repairs, projects.
- Other incomeLine 6
Business income that is neither sales of goods nor services, such as a refund of a business cost.
- Interest incomeLine 6
Interest earned on business accounts.
- Not income
Money that is not business income: sales tax collected for the state, a returned deposit, a loan.
For developers and assistants
In the API and in MCP
Read the categories, suggest for up to 25 records at a time, and read each record’s category and waiting suggestion. An assistant creates drafts only; confirming asks a person, or runs at once only under a rule the owner set.
BillingMart Agent
Ask for your categories in plain words; the Agent suggests and asks you to confirm.
Make tax time shorter
A suggestion, not tax advice. Check your categories with your accountant. Suggestions on every plan; AI credits are used only when the free answers cannot decide.