The answer to this depends on your specific circumstances, and on the two of you as individuals. Financial planners and divorce attorneys argue that prenuptial agreements should be considered if any of the following particulars apply:
Often, prenuptial agreements are misunderstood. It is argued that prenuptial agreements are an attack on trust, or evidence that financial matters outweigh the presence of love in a marriage. This is not necessarily true. Most prenuptial agreements are made by couples who have children or grandchildren from prior marriages and want to ensure that individual property such as businesses or estates pass down to the family rather than the spouse. Regardless of the circumstances, prenuptial agreements are a comprehensive decision, and should be approached bereft to emotion misconceptions.
Any terms of a prenuptial agreement can legally be altered or modified in the future if both parties so decide. Other terms of the prenuptial agreement no altered will remain intact unless both parties revoke the entire agreement in writing.
Post nuptial agreements are becoming increasingly common. Post nuptial agreements are much like prenuptials but are drafted and signed after a couple has been married. Post nuptials can be drawn up at any time during the course of a marriage, and can be altered in the same way as a prenuptial agreement.