Ask what happens if you add a co-founder, raise equity or become unable to manage the company. If each event requires urgent restructuring, another entity may fit better from the beginning.
Founder loans and expenses
Record money you lend to the company separately from share capital. Reimburse business expenses with documentation. Mixing personal and company transactions weakens the liability and accounting discipline you created the company to obtain.
Contracts should be in the company’s name
Once incorporated, customer contracts, IP assignments and major assets should clearly identify the company where appropriate. A founder who continues signing everything personally can create ownership confusion.
Annual compliance budget
Estimate accounting, filing, audit where applicable, tax and professional costs before choosing the structure. The cheapest incorporation quote says little about the recurring cost.
An OPC is strongest when the founder intentionally behaves like a company from day one: separate bank account, documented decisions, clean ownership and a plan for conversion when the ownership model changes.