Sole Trader or Limited Company? Tax, Liability and the Switch
This is the tensest question at the formation table, and it is usually asked from the wrong angle: “which pays less tax?” The right question is: what risk does your work create, and whom do you sell to? Tax follows those two answers.
Definitions live in the business types guide; here we build the decision on four scales. The complete guide holds the rest of the road. Note: this is a frame, not accounting advice — have your accountant run the numbers on your own case.
Scale 1: Liability
The most decisive scale. In a sole proprietorship the business’s debt is your debt; home, car and savings sit in the same pool. In a limited company liability is, as a rule, capped at committed capital — with exceptions for public debts and certain cases, the protection is real.
The practical measure: if your work produces commitments, deliveries, manufacturing or high-value contracts, the scale tips to a company. One-person consulting and service work usually carries far less of that risk.
Scale 2: Tax and Profit Level
A sole proprietorship faces progressive income tax: the rate climbs as profit climbs. A company pays corporate tax at a flat rate, but moving profit to yourself brings a second layer through distribution.
The pattern that emerges: at low and middle profit the sole trader usually wins; once profit passes a certain level and part of it is left inside the business, the company pulls ahead. Where the threshold sits changes by year and rate, so have it calculated with current figures.
Scale 3: Accounting and Administrative Load
Bookkeeping is simple for a sole proprietorship and the monthly accountant’s fee is low. A company brings balance-sheet accounting, fuller filings and a markedly higher monthly fee.
The gap looks small monthly but becomes a real line annually, and at low turnover it can eat a visible share of profit. Item-by-item comparison is in the cost guide.
Scale 4: Customers and Perception
Whom you sell to is invisible on paper but decisive in the field. Corporate clients, public tenders and large supply chains generally expect a legal entity; some procurement systems will not even list a sole trader as a supplier.
Selling to individuals, that expectation barely exists. This weighs heavier for foreign founders, whose corporate clients often want a registered Turkish entity on the contract. Write your customer profile down; the scale usually tips itself.
The Decision Table: Four Questions, One Answer
Answer these: (1) Does the work create high-value commitments? (2) Do you have partners, or will you within two years? (3) Are your customers mainly corporate? (4) Do you plan to retain a significant share of profit inside the business?
Three or more “yes” → limited company. Zero or one → sole proprietorship. Two “yes” is the middle band: starting as a sole trader and watching the threshold is usually the cheaper strategy.
The Right Time to Switch
Moving from sole trader to company is not a sign of failure but a natural step of growth. The signals are clear: settling into upper tax brackets, the first large corporate contract, adding a partner, and risk creeping toward personal assets.
Plan the switch for the start of a fiscal period rather than mid-year; two structures filing separately within one year creates avoidable complexity. The timing frame sits in the timing guide.
Field Note
Two clients registered in the same month. The first, a graphic designer selling to individuals, founded a limited company “to look corporate” and spent two years watching monthly accounting take a noticeable slice of profit. The second ran a renovation business as a sole trader; at the first large contract the work met personal liability, and a delay penalty landed on him directly. Neither had asked the right question: what does the work produce?
Quick Summary
Four scales: liability, tax and profit level, accounting load, customer perception. Commitments and corporate clients point to a company; low risk and individual customers to a sole trader. Three “yes” answers out of four mean a company. Switching is always possible and is planned at period start.
Frequently Asked Questions
Sık Sorulan Sorular
Not difficult; it runs through closure and formation or a transfer. What needs planning is the fiscal period and the transfer of ongoing contracts.
With corporate clients, yes; with individuals it changes little. Trust is built mainly by references and visibility.
You can, by adding activity codes. Keeping two very different risk profiles in one entity, however, deserves a liability discussion.
Next step: Answer the four questions and confirm with current rates through your accountant; once decided, build the file with the documents guide.