
In the US, a common-law spouse can be claimed as a dependent on a federal tax return, which entitles the individual to claim a dependency exemption. This allows the taxpayer to deduct money from their income. However, there are specific criteria that must be met to qualify as a common-law spouse, such as living together for at least 12 continuous months or having a child together. It is important to note that only a handful of states in the US recognize common-law marriages. In Canada, common-law couples are treated the same as married couples for tax purposes, and there are various tax credits and deductions that may be maximized when filing as a common-law partner.
Characteristics of a common-law spouse as a legal tax dependent
| Characteristics | Values |
|---|---|
| Definition of common-law spouse | A person with whom you live in a conjugal relationship who is not your spouse, and has been living with you at least 12 continuous months (some sources state this includes any period separated for less than 90 days) |
| Common-law spouse as dependent | You can claim your common-law spouse as a dependent on your federal tax return, entitling you to a dependency exemption. |
| Requirements for claiming common-law spouse as dependent | Your common-law spouse must be a US citizen, national, or resident alien (or resident of Canada or Mexico). They must have lived with you for the entire tax year for which you are claiming the deduction. No other person can have claimed them as a dependent. |
| Tax credits and deductions | Common-law couples can combine receipts for medical expenses and charitable donations to maximize credits and pay less tax. They can also claim the Family Tax Cut, the federal and provincial spousal amount tax credit, and the Home Buyers tax credit. |
| Loss of tax credits | Filing as a common-law couple may result in the loss of certain tax credits that would be available to single filers. Only one partner may be eligible for the credit, and the combined income may make the couple ineligible. |
| Transfer of credits | Common-law partners can transfer unused tax credits to their partner, such as post-secondary education credits, the Disability Tax Credit, and the age credit. |
| Risks of not disclosing common-law status | If you do not disclose your common-law relationship status on your tax return, you may be guilty of filing a fraudulent return. This can result in reassessment for unpaid taxes, interest, and penalties. |
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What You'll Learn
- Common-law spouses are treated the same as married couples under the federal Income Tax Act
- Common-law partners can transfer unused tax credits to reduce household tax rates
- Common-law couples may lose tax credits they were entitled to as single people
- Common-law partners can claim the Family Tax Cut if they have a child under 18
- Common-law partners can combine receipts to maximise credits and pay less tax

Common-law spouses are treated the same as married couples under the federal Income Tax Act
The recognition of common-law spouses varies across different jurisdictions. In Canada, a common-law partner is defined by the federal Income Tax Act as:
> "A person with whom you live in a conjugal relationship who is not your spouse, and he or she: has been living with you at least 12 continuous months (includes any period you were separated for less than 90 days because of a breakdown in the relationship); OR is the parent of your child by birth or adoption; OR has custody and control of your child (or had custody and control immediately before the child turned 19 years of age) and your child is wholly dependent on that person for support."
Therefore, under the federal Income Tax Act, common-law couples are treated the same as married couples. However, it is important to note that the definition of a common-law relationship varies from province to province in Canada.
In the United States, only a handful of states recognize common-law marriages, including Colorado and Iowa. In these states, common-law spouses may be considered legal tax dependents. To claim a common-law spouse as a dependent, certain criteria must be met, including the spouse being a United States citizen, national, or resident alien, and having lived together for the entire tax year.
The advantages of filing taxes as a common-law couple include maximizing certain tax credits and deductions, such as combining medical expenses and charitable donations, claiming the Family Tax Cut, and transferring unused tax credits to a partner. However, there may also be disadvantages, such as losing some tax credits that were available when filing as a single person.
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Common-law partners can transfer unused tax credits to reduce household tax rates
The recognition of common-law marriage varies across different regions. For instance, only a handful of states in the US, such as Colorado and Iowa, recognize common-law marriage. In Canada, the Government defines a common-law marriage as living in a conjugal relationship with a person who is not your married spouse, with at least one of the following conditions being met: the partner has lived with you for at least 12 continuous months; the partner is the parent of your child by birth or adoption; the partner has custody and control of your child, and the child is wholly dependent on them for support.
Under the federal Income Tax Act, common-law couples are treated the same as married couples. Common-law partners may transfer unused tax credits to their partner to reduce their household tax rate. These credits can include post-secondary education credits, the Disability Tax Credit, the age credit for those 65 and older, and pension income amounts.
There are both advantages and disadvantages to filing your income tax return as a common-law partner. One advantage is that you may be able to maximize certain tax credits and deductions. For example, common-law partners can combine receipts for medical expenses and charitable donations to maximize credits and pay less tax. They can also claim the Family Tax Cut if they have a child under 18, as well as the federal and provincial spousal amount tax credit if they supported their partner financially and their partner earned below a certain amount.
However, a disadvantage is that you may lose some tax credits that you were entitled to when filing as a single person. For example, you may no longer be eligible for the eligible dependent credit, the Guaranteed Income Supplement, and the Allowance offered under the Old Age Security program. To be eligible for many tax credits, such as the GST/HST credit and the CCB, common-law partners must meet CRA's low-income family eligibility requirements.
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Common-law couples may lose tax credits they were entitled to as single people
The definition of a common-law spouse varies from region to region. In Canada, a common-law partner is defined by the federal Income Tax Act as:
> "A person with whom you live in a conjugal relationship who is not your spouse, and he or she: has been living with you at least 12 continuous months (includes any period you were separated for less than 90 days because of a breakdown in the relationship); OR is the parent of your child by birth or adoption; OR has custody and control of your child (or had custody and control immediately before the child turned 19 years of age) and your child is wholly dependent on that person for support."
In the United States, only a handful of states recognize common-law marriage, including Colorado and Iowa. In Colorado, a common-law marriage is recognized if each party is 18 or older, and the marriage is not prohibited by law. Iowa recognizes common-law marriage for child support purposes.
Common-law couples are treated the same as married couples for tax purposes. This means that common-law partners may lose some tax credits they were entitled to as single people. For instance, the combined family income may make them ineligible for certain credits. Additionally, only one partner may be eligible to receive the benefit. Some of the credits that may be affected include the eligible dependent credit, the Guaranteed Income Supplement, and the Allowance offered under the Old Age Security program.
However, there can also be advantages to filing taxes as a common-law couple. For example, common-law partners may be able to combine receipts for medical expenses and charitable donations to maximize credits and pay less tax. They may also be able to claim the Family Tax Cut and transfer unused tax credits to their partner.
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Common-law partners can claim the Family Tax Cut if they have a child under 18
In general, common-law couples are treated the same as married couples for tax purposes. However, common-law partners cannot file joint returns; instead, they must file individual returns and indicate their common-law status. This involves disclosing their partner's name, social insurance number, and net income on their return.
There are several advantages and disadvantages to filing taxes as a common-law partner. One advantage is that common-law partners can claim the Family Tax Cut if they have a child under 18. This is because, to be considered a common-law couple, a pair must live in a conjugal relationship for at least 12 continuous months, or one person must be the parent of the other's child by birth or adoption, or one person must have custody and control of the other's child and the child must be wholly dependent on them for support.
Common-law partners can also combine receipts for medical expenses and charitable donations to maximize credits and pay less tax. They may also be able to claim the federal and provincial (if applicable) spouse or common-law partner amount tax credit if they supported their partner financially and they earned below a certain amount for the year.
However, there are also some disadvantages to filing taxes as a common-law partner. For example, a higher combined income may reduce eligibility for certain income-tested benefits. Additionally, common-law partners may no longer be eligible for certain tax credits, such as the GST/HST credit, Canada Child Benefit, Guaranteed Income Supplement, and Working Income Tax Benefit.
It is important to note that the definition of a common-law relationship may vary across different provinces in Canada, so it is essential for common-law couples to understand the tax implications of their specific situation.
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Common-law partners can combine receipts to maximise credits and pay less tax
In Canada, common-law couples are treated the same as married couples under the federal Income Tax Act. Common-law partners can combine receipts to maximise credits and pay less tax.
The definition of a common-law partner under the Act is "a person with whom you live in a conjugal relationship who is not your spouse, and he or she: has been living with you at least 12 continuous months (includes any period you were separated for less than 90 days because of a breakdown in the relationship); OR is the parent of your child by birth or adoption; OR has custody and control of your child (or had custody and control immediately before the child turned 19 years of age) and your child is wholly dependent on that person for support".
There are advantages and disadvantages to filing your income tax return as a common-law partner. One advantage is that common-law partners may combine receipts for medical expenses and charitable donations to maximise credits and pay less tax. They can also claim the Family Tax Cut if they have a child under 18, claim the Home Buyers tax credit, and transfer credits to their partner, such as post-secondary education credits and the Disability Tax Credit.
However, when filing as a common-law partner, you may lose some tax credits that you were entitled to when filing as a single person. For example, only one partner may be eligible to receive the benefit, and the combined income may make you ineligible for certain credits.
It is important to note that the definition of a common-law relationship varies from province to province in Canada, and only a small handful of states in the US recognise common-law marriage. If you are living in a common-law relationship, you must disclose your relationship status and information about your partner when filing your tax return, or you may face consequences such as being reassessed for unpaid taxes and interest.
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Frequently asked questions
A common-law spouse is someone with whom you live in a conjugal relationship who is not your married spouse. The definition of a common-law partner varies from province to province, but generally, it involves living together for at least 12 continuous months, being the parent of each other's child, or having custody and control of a child who is dependent on both of you for support.
In some jurisdictions, common-law couples are treated the same as married couples for tax purposes. This means that you may be able to combine receipts to maximize tax credits and deductions, such as medical expenses and charitable donations. You may also be able to claim certain tax credits, such as the Family Tax Cut or the Home Buyers tax credit. However, filing as a common-law couple may also result in losing some tax credits that you would have been entitled to as a single person.
Yes, you may be able to claim your common-law spouse as a dependent on your tax return, which would entitle you to claim a dependency exemption. This permits you to deduct a certain amount of money from your taxable income. However, your common-law spouse must meet certain requirements, such as being a citizen or resident of the country and having lived with you for the entire tax year.
Failing to disclose your common-law relationship status on your tax return can be considered tax fraud, which can result in reassessment for unpaid taxes, interest, and penalties. It may also impact your eligibility for certain benefits, such as CPP and other pension survivor benefits.
The recognition of common-law relationships for tax purposes varies by jurisdiction. In some places, such as Canada, common-law relationships are recognized for tax purposes and are treated similarly to married couples. However, in other places, only a small handful of states or provinces may recognize common-law marriage. It is important to consult with a tax professional or a family law attorney to understand the specific rules and requirements in your area.






























