Self Assessment for business partnerships

A partnership does not pay Income Tax itself. Instead, the partnership's total profit is split between the partners according to their agreed shares, and each partner pays tax individually on their own share, alongside any other income they have.

One partner is the nominated partner, responsible for registering the partnership with HMRC and for completing and filing the SA800 partnership return on time, so the other partners have the figures they need for their own returns.

How Self Assessment registration works →

Register online, or by paper using form SA400 for the partnership itself. Every individual partner must also register separately, using form SA401 on paper or the equivalent online route, so each gets their own Self Assessment record.

The registration deadline is the same 5 October rule that applies to any new Self Assessment taxpayer, counted from the tax year the partnership started trading.

The SA800 partnership return and each partner's personal return follow the normal Self Assessment calendar: file online by 31 January after the tax year ends, with any tax owed by each partner personally due on the same date.

The full Self Assessment deadline calendar →

A partnership must register for VAT separately once its VAT-taxable turnover passes £90,000, the same threshold that applies to any other business. Registering voluntarily below that can still make sense if you want to reclaim VAT on purchases.

When you must register for VAT →

We prepare and file Self Assessment returns for directors, sole traders and landlords, and tell you exactly what is due and when before anything is submitted. Call 0114 327 1480.

Our Self Assessment service →