
Common-law marriage, a type of informal marriage that exists in some US states, is a legal union between two individuals who have lived together for a significant amount of time without a formal ceremony or marriage license. In South Dakota, common-law marriage is recognized if certain requirements are met, such as both parties being 18 years of age or older, and considering themselves married. While South Dakota does not recognize common-law marriages formed after 1959, it will respect common-law marriages formed in other states. This means that individuals in a common-law marriage in South Dakota are entitled to the same rights and benefits as those in a traditional marriage, including spousal health benefits and tax advantages.
| Characteristics | Values |
|---|---|
| Common law marriage recognized? | Yes, if consummated prior to 1959 |
| Requirements | Both parties must be 18 or older, consider themselves married, and live together for a significant amount of time |
| Benefits | Spousal health insurance, spousal status on federal tax forms, life insurance benefits |
| Other | Common law marriage is not recognized in most states and is referred to as an informal marriage |
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What You'll Learn

Common law marriage requirements in South Dakota
South Dakota is one of the few states that still recognizes common-law marriage as a valid form of marital relationship. A common-law marriage is a legal union between two individuals without a formal marriage ceremony or a marriage license from the state.
To establish a common-law marriage in South Dakota, certain requirements must be met, and both parties must act as though they are married. These requirements include:
- Mutual consent: Both parties must agree to be in a marital relationship and present themselves as a married couple in public. This includes introducing each other as husband and wife, signing each other's last name, and filing taxes jointly.
- Co-habitation: The couple must live together for a significant amount of time, usually several years or longer, with the intention to establish a marital relationship. There is no specific time requirement set in law, but the duration of the relationship is important.
- Age requirement: Both parties must be at least 18 years of age or older. If one or both parties are under 18, the common-law marriage is invalid, as this is the legal age to enter into a contract, including marriage, in South Dakota.
It is important to note that establishing a common-law marriage in South Dakota may require evidence that demonstrates the couple's intent to be married. This can include joint financial accounts, referring to each other as "husband" or "wife", and any other actions that reflect a belief that they are married.
While common-law marriage is recognized in South Dakota, it is not as common as it once was in the United States. Couples considering a common-law marriage should understand their legal rights and obligations, especially if they have children, buy or sell property together, or make other important commitments. Consulting a lawyer is advisable to ensure all legal requirements are met and rights are protected.
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Benefits of common law marriage
Common-law marriage is a legal framework that recognises couples who live together for an extended period as legally married, even without a formal wedding ceremony or marriage license. While it is not recognised in all states, common-law marriage does offer several benefits for couples who choose this path.
One of the primary advantages of common-law marriage is that couples can attain the same marital rights and responsibilities as formally married couples. This includes inheritance rights, where common-law spouses can inherit their partner's property with a valid will, and tax benefits, such as exemption from the gift tax for gifts exchanged between the couple. Additionally, common-law spouses may be eligible for spousal retirement and survivor benefits, as well as Social Security disability benefits based on their age and work history.
Another benefit of common-law marriage is the potential for cost savings. Without the need for a formal ceremony, couples can avoid the expenses associated with traditional weddings. Furthermore, common-law spouses may be able to take advantage of employment perks, such as family leave, bereavement leave, and access to their partner's retirement accounts or pension plans.
In the context of healthcare, common-law marriage can provide benefits such as combining health insurance policies, potentially reducing the amount paid in monthly premiums. Additionally, common-law spouses can be designated as the person to make medical decisions for their partner in the event of incapacity through a medical power of attorney (POA).
While common-law marriage offers these benefits, it is important to note that it may also present challenges. For example, proving the existence of a common-law marriage can be difficult, and there may be financial and legal complexities if the relationship ends. Therefore, it is crucial for couples to understand the specific requirements and legal implications in their state before choosing common-law marriage.
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Common law marriage in South Dakota vs other states
Common-law marriage in South Dakota is a complex issue. While some sources state that South Dakota does recognize common-law marriages, others claim that the practice was banned in the state in 1959. The discrepancy may lie in the fact that South Dakota has a grandfather clause, meaning that any common-law marriage established before 1959 is still valid and recognized by the state today.
Common-law marriage is a type of informal marriage that exists in some states in the US. It is a legal union between two individuals who have lived together for a significant amount of time without a formal ceremony or marriage license from the state. The requirements for common-law marriage vary from state to state, but generally include a co-habitation requirement, mutual consent, and "holding out". This means that the couple must live together for a certain period, usually several years, with the intention to be married, and they must present themselves as a married couple to their community.
In South Dakota, common-law marriage is recognized if both parties are 18 years of age or older and consider themselves to be married. The duration of the relationship is also important, and the couple must have lived together long enough to establish a marital relationship. Evidence of a common-law marriage in South Dakota might include joint financial accounts, signing each other's last names, filing taxes jointly, and referring to each other as "husband" or "wife".
Compared to other states, South Dakota is unique in that it has a ban on common-law marriages established after 1959, while still recognizing those that were formed before this date. Other states that recognize common-law marriage include Alabama, Colorado, Iowa, Kansas, Montana, Rhode Island, Texas, and Utah. It's important to note that the recognition of common-law marriage varies from state to state, and some states may have additional requirements or conditions.
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History of common law marriage in South Dakota
Common-law marriage in South Dakota is a centuries-old practice that dates back to a time when individuals in isolated, rural settings did not have easy access to priests or officials to conduct formal marriage ceremonies. This type of informal marriage allowed couples to agree that they were married without a ceremony or marriage license, as long as they met certain requirements, such as both parties being at least 18 years old and agreeing that they considered themselves to be married. The couple was then entitled to the same rights as a traditionally married couple, including spousal health benefits, tax benefits, and inheritance rights.
However, the recognition of common-law marriage in South Dakota has changed over time. In 1959, South Dakota abolished common-law marriage, citing the increasing accessibility of officials and the decreasing stigma surrounding children born outside of marriage as reasons for the change. Despite this, the state has a built-in grandfather clause, which means that any common-law marriages that began in 1959 or prior are still valid. Additionally, South Dakota will respect common-law marriages that were validly established in other states that still recognize this form of marriage.
In a notable case in 2016, the South Dakota Supreme Court ruled on whether a couple, Karen Hargrave and Paul Duval, had established a common-law marriage. Hargrave argued that they had, while Duval's adult daughters disagreed. The court concluded that while South Dakota would recognize a common-law marriage formed by its residents in another state, Hargrave and Duval's relationship did not meet the standard necessary for the state to recognize their union as a common-law marriage.
Today, South Dakota is one of the few states that still recognize common-law marriage as a valid form of marital relationship. To establish a common-law marriage in the state, couples must meet certain requirements, such as cohabiting for a period long enough to establish a marital relationship and acting as though they are married in their public life. While this form of marriage continues to play a role in South Dakota, it is important to note that the legal requirements and recognition of common-law marriage can vary from state to state.
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Legal rights and obligations of common law spouses in South Dakota
South Dakota is one of the few states in the US that still recognizes common-law marriages as a valid form of marital relationship. A common-law marriage in South Dakota is a legal union between two individuals who have lived together for a significant amount of time without a formal ceremony or marriage license from the state.
For a common-law marriage to be recognized in South Dakota, certain requirements must be met. Both parties must be 18 years of age or older and consider themselves married. The couple must live together for a period long enough to establish a marital relationship, typically several years or longer. They must also present themselves to the public as a married couple, marked by cohabitation and monogamy.
Once a common-law marriage is established, it is treated like a typical marriage with all the same rights and benefits. Common-law spouses in South Dakota have rights to spousal health benefits, qualify as a spouse on federal tax forms, and are entitled to inheritance rights. In the event of separation or divorce, common-law spouses have the same obligations as traditionally married couples regarding spousal support, property division, and child custody and support.
It is important to note that while South Dakota recognizes common-law marriages, it does not uphold prenuptial agreements that restrict a spouse's right to receive alimony. Additionally, any agreements between unmarried couples, whether informal or written, may not be legally enforceable. Therefore, it is recommended to consult a lawyer to understand the legal rights and obligations in such cases.
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Frequently asked questions
A common law marriage is a legal union between two individuals who have lived together for a significant amount of time without a formal ceremony or marriage license from the state.
Common law marriage is legal in South Dakota if the relationship was established before 1959 and both parties are 18 years of age or older. South Dakota is one of the few states that still recognize common law marriage as a valid form of marital relationship.
A common law spouse in South Dakota is entitled to the same rights as a traditionally married spouse. This includes spousal health benefits, qualification as a spouse on federal tax forms, and life insurance benefits.




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