WATNA (Worst Alternative to a Negotiated Agreement) is a concept developed by Roger Fisher and William Ury of the Harvard Program on Negotiation.  It was popularised in their book Getting to Yes (Random House Business Books, 3rd edition, 2012).  The WATNA represents one of several paths which a party may follow if a settlement can not be reached.

Like its BATNA counterpart, the WATNA can be used to compare against the other options (including offers) available, to assist a party in making a more informed decision.