When it comes to explaining why something didn't happen or was delayed because of a financial constraint, there are several synonyms for "due to lack of funds" that can be used in its place. Some of the common phrases that can be used are "for want of money," "as a result of insufficient funds," "due to financial constraints," "because of a shortage of funds," or "because there wasn't enough money available." These phrases make it clear that money was the primary issue behind the delay, without directly pointing fingers or placing blame. Overall, using a synonym can help diversify your writing and avoid repetition.