Contractor Tax & Invoicing in South Africa: SARS, VAT and Provisional Tax Explained

The technical part of contracting is the easy part — most developers are tripped up by the admin. This guide demystifies the tax and invoicing essentials for South African IT contractors. It is general information, not formal tax advice; for anything material, talk to a registered tax practitioner.

Sole proprietor or company?

Your first decision is the structure you trade through:

• Sole proprietor — simplest. You invoice in your own name, and the income is taxed in your personal return at the normal sliding scale. Ideal when you're starting out.
• Private company (Pty Ltd) — more admin and a separate company tax return, but it separates business and personal liability and can be more efficient at higher, stable incomes. Beware the “personal service provider” rules, which can tax a one-client company punitively.

Most contractors start as sole proprietors and only incorporate once income is high and steady.

Provisional tax: the rhythm you must learn

As a contractor you are a provisional taxpayer. Instead of monthly PAYE, you estimate your annual taxable income and pay SARS in instalments:

• First payment — end of August (half the estimated year's tax).
• Second payment — end of February (the balance).
• Optional third (top-up) — by end September, to avoid interest if you under-estimated.

The golden rule: move 30–40% of every invoice into a separate tax account the day it's paid. Provisional tax punishes contractors who treat gross income as spendable. We touch on this discipline in contractor vs permanent.

When do you have to register for VAT?

VAT registration is compulsory once your taxable turnover exceeds R1 million in any rolling 12-month period. You may register voluntarily above R50,000. Once registered, you add 15% VAT to your invoices, file VAT returns (usually every two months), and can claim VAT back on business expenses. Below the threshold, you simply don't charge VAT — many contractors stay there deliberately to keep admin light. Note that foreign clients are typically zero-rated, which interacts with the threshold in ways worth checking with an accountant if you bill international clients.

What a compliant invoice contains

Whether or not you're VAT-registered, a professional invoice should include:

• Your name/business name, address and contact details
• Your tax/VAT number (VAT number only if registered)
• A unique invoice number and the date
• The client's details
• A clear description of services, the rate, days/hours, and the total
• If VAT-registered: the VAT amount shown separately and the words “Tax Invoice”
• Your banking details and payment terms (e.g. “payable within 14 days”)

Expenses you can legitimately claim

As an independent contractor you can deduct expenses incurred in producing your income, which lowers your taxable profit. Common ones include:

• Equipment — laptop, monitor, peripherals (larger items may be depreciated over time)
• Software subscriptions and developer tools
• Internet and a portion of your phone
• A home-office deduction, if you have a dedicated, exclusively-used workspace and meet SARS's conditions
• Professional costs — accounting fees, indemnity insurance, relevant training

Keep every invoice, receipt and bank record for at least five years. SARS can request supporting documents, and good record-keeping is the difference between a smooth and a stressful audit.

The simplest possible system

You don't need expensive software to start. A dedicated business bank account, a separate “tax” savings account, a simple invoicing tool or template, and a folder for receipts will carry you a long way. As income grows, an accountant who understands contractors pays for themselves many times over. Get the admin right early and contracting becomes what it should be — a well-paid, flexible career. See what's live on the board to put it into practice.