A sole proprietorship is often the fastest way to start a business in Serbia, but registration is only the first step. Before issuing the first invoice, a founder should choose a tax model, check VAT exposure, assess the independence test, open and correctly use a business account, and put client relationships into writing.
Foreign founders should also review the separate requirements explained in our guide to starting a business in Serbia and obtaining a single work permit. This article focuses on the practical decisions that create the greatest tax and contractual risk.
Five checks to complete before registration
Before choosing the sole-proprietor form, confirm:
- whether the planned activity may be taxed on a lump-sum basis;
- whether expected turnover fits the chosen tax model;
- whether the VAT threshold may be crossed;
- whether work for one major client creates independence-test risk;
- whether personal liability is acceptable for the business.
A sole proprietor is not separated from the individual in the same way as a limited liability company. Business obligations may therefore affect personal assets. If the activity carries substantial contractual, employment, regulatory or damages exposure, compare this structure with an LLC before registering. Our practical guide explains the formation of an LLC in Serbia step by step.
An LLC also brings company-governance and disclosure duties. Founders choosing that structure should understand the current beneficial ownership rules in Serbia before registration and later ownership changes.
Choose the tax model before the first invoice
Lump-sum taxation
Under lump-sum taxation, the tax authority determines a fixed monthly tax and social-contribution liability. Actual monthly profit does not directly determine that fixed amount.
This model can simplify administration, but it is not available for every activity or every level and structure of turnover. It should not be selected merely because another entrepreneur uses it. The registered activity, actual work, expected revenue and legal restrictions must be checked first.
The commonly discussed RSD 6 million limit concerns eligibility for lump-sum taxation. It is not the same as the VAT threshold. Confusing these two figures is one of the most frequent planning mistakes.
Self-taxation and personal salary
An entrepreneur who keeps accounting records may generally operate under self-taxation rules, with the possibility of opting for a personal salary where statutory requirements are met. These alternatives affect taxes and contributions, bookkeeping duties and cash-flow planning.
Before deciding, prepare a realistic twelve-month projection covering revenue, business expenses, planned withdrawals, employees or contractors, foreign income and investment. Choose the model from the projected business, not only from the lowest payment in the first month.
RSD 6 million and the RSD 8 million VAT threshold are different
These figures regulate different questions:
- RSD 6 million is relevant to the lump-sum taxation regime;
- RSD 8 million is relevant to the small-taxpayer VAT threshold, assessed under VAT rules for the relevant twelve-month period.
A person may lose the conditions for one regime without automatically producing the same consequence under the other. Turnover should therefore be monitored continuously rather than only at the end of the calendar year.
Voluntary VAT registration may make commercial sense where clients are predominantly VAT-registered companies and input VAT is significant. For a business serving consumers or clients unable to deduct VAT, registration can affect pricing. Model the decision before contracts and prices are finalised.
Check the independence test before signing with a major client
The independence test is particularly important for consultants, IT professionals, designers, marketing specialists and other entrepreneurs who derive a large share of income from one principal.
The analysis does not depend only on the agreement's title. The authorities may consider how the relationship works in practice, including control over working hours and place of work, use of the principal's equipment, exclusivity, allocation of business risk, continuity and the share of income coming from one principal.
Practical warning signs include:
- the client determines daily working hours and approves absences;
- the entrepreneur works mainly from the client's premises;
- the client provides essential equipment;
- the agreement prevents work for other clients;
- payment resembles a fixed salary regardless of deliverables;
- the entrepreneur bears little genuine commercial risk;
- almost all income comes from one business relationship.
No single clause automatically resolves the issue. The written contract, invoices, communication and actual organisation of work should be consistent.
Put the client relationship into a usable contract
A practical services agreement should define:
- scope and deliverables;
- deadlines and acceptance procedure;
- price, currency, taxes and payment deadline;
- expenses and third-party costs;
- intellectual-property rights;
- confidentiality and data protection;
- liability limitations where legally permitted;
- termination rights and consequences;
- governing law and dispute resolution.
Avoid copying employment-style provisions into a business-to-business agreement. Removing such wording is not enough if the real relationship still operates like employment.
Business account and international payments
Use the business account consistently for business receipts and payments. Banks may request contracts, invoices, explanations of transaction purpose and counterparty information, especially for international transfers.
Before receiving the first foreign payment, verify that the contract identifies the service and payment basis, invoice data match registration and bank data, the currency and instructions are correct, and supporting documents are available. Check whether foreign-exchange, tax or reporting rules require additional steps.
Do not treat the business account as an ordinary personal wallet. Keep a clear record of business expenditure and transfers to the entrepreneur.
What the first invoice should contain
Verify the registered business name, address, identification numbers, account details, client data, service description, date, amount, currency, payment deadline and applicable tax wording.
Also determine whether the transaction belongs in the electronic invoicing system, whether fiscalisation rules apply and whether the client requires additional documentation. These questions depend on the parties and transaction type; one template is not suitable for every situation.
A practical first-30-days checklist
Before registration
- compare sole proprietor and LLC liability;
- select the activity code based on actual work;
- obtain a turnover and tax projection;
- check lump-sum eligibility and VAT implications;
- analyse the relationship with the main client.
Immediately after registration
- open the business account;
- arrange bookkeeping and tax deadlines;
- create compliant contract and invoice templates;
- set up document storage and payment tracking;
- determine whether fiscalisation or electronic invoicing applies.
Before the first invoice
- sign the contract;
- verify client and payment data;
- confirm the tax treatment;
- prepare evidence of the delivered service;
- check whether the invoice must be issued through a specific system.
Common mistakes
The most expensive mistakes usually occur before revenue starts: choosing a structure only because registration is easy, mixing the lump-sum and VAT thresholds, ignoring the independence test, using vague internet contracts, accepting foreign payments without documentation and failing to reserve cash for taxes and contributions.
A short legal and tax review based on the real business model is usually less expensive than correcting the structure after turnover, a tax inspection or a dispute has arisen. Individual review is particularly important where the work involves a foreign client, one dominant principal, regulated services, valuable intellectual property or material liability.
Frequently asked questions
Is a sole proprietor always cheaper than an LLC?
No. The answer depends on revenue, costs, tax status, planned withdrawals, liability and the way contracts are structured.
Does turnover below RSD 6 million mean there is no VAT obligation?
Not necessarily. The lump-sum limit and VAT threshold govern different issues and must be assessed separately.
Can a sole proprietor work for only one client?
It is possible, but the relationship should be reviewed under the independence-test criteria. The real organisation of work matters more than the contract title.
Should the entrepreneur register for VAT voluntarily?
Sometimes. It may be useful where input VAT is substantial and clients can deduct VAT, but it can also affect prices and administration. Make a calculation before opting in.
When is an LLC a safer choice?
An LLC may be more suitable where the business carries higher liability, has several founders, plans investment or employees, or needs clearer separation between personal and business assets.
Final practical point
Registration should be the result of planning, not the start of it. Before the first invoice, align the legal form, tax model, VAT position, client contract and payment documentation. That preparation is usually faster and less expensive than correcting the structure after turnover, an inspection or a dispute.
