Child Support in Alberta: The Complete 2026 Guide

It usually starts at the kitchen table, with a calculator, a stack of tax returns and one question: what is the number, and how did anyone arrive at it? Edmonton family lawyers are often asked exactly that. Child support in Alberta is more structured than most areas of family law, running on written guidelines, published tables and a defined income figure.

That structure does not make it simple. The arguments happen at the edges: what counts as income, what counts as a special expense, and what happens when nobody has updated the number in years.

Short answer

Child support in Alberta is calculated under child support guidelines that set a monthly table amount based on the payor's guideline income, the number of children and the payor's province of residence, with section 7 special and extraordinary expenses shared on top in proportion to each parent's income. The 2025 Federal Child Support Tables took effect October 1, 2025.

• Child support is the right of the child, not of the receiving parent.

• Married spouses divorcing use the Divorce Act and the Federal Child Support Guidelines. Unmarried and adult interdependent partners use Alberta's Family Law Act. The Alberta table applies either way.

• Guideline income starts at line 15000 of the tax return, then gets adjusted.

• Shared parenting, 40 percent of parenting time or more, is not a straight set-off.

• Support can continue past 18 for a child in full-time education or otherwise dependent.

• Alberta enforces support through the Maintenance Enforcement Program (MEP).

Who pays child support in Alberta, and why?

In Alberta, the parent without the majority of parenting time generally pays child support to the parent who has it. Where parenting time is closer to equal, both incomes come into the calculation and one parent pays the difference. Step-parents who have stood in the place of a parent can also be ordered to contribute.

Child support belongs to the child. Courts treat it as the child's right, which is why parents cannot bargain it away or waive it in a separation agreement and expect that to hold. It also means support is not conditional on the payor seeing the children, and withholding parenting time is not a defence to non-payment.

Which law applies to you: the Divorce Act or Alberta's Family Law Act?

Two statutes govern child support in Alberta, and which applies depends on whether you were married. Married spouses seeking a divorce fall under the Divorce Act (Canada) and the Federal Child Support Guidelines. Unmarried parents, including adult interdependent partners, fall under Alberta's Family Law Act and the Alberta Child Support Guidelines.

The outcome is close to identical, because the Alberta Child Support Guidelines adopt the federal tables. A payor living in Alberta is measured against the Alberta table either way. Our guide on how to get a divorce in Alberta covers the process.

Divorce Act vs Alberta Family Law Act: which applies to you

How is the table amount of child support calculated?

The table amount is the base monthly figure, and it turns on three inputs: the payor's guideline income, the number of children covered, and the payor's province of residence, and it is not adjusted for the receiving parent's income.

The tables are set by the Department of Justice Canada, built from average tax and spending data rather than the cost of one child. The 2025 Federal Child Support Tables took effect October 1, 2025 and reflect more recent tax rules. For the period from November 22, 2017 to September 30, 2025, the 2017 tables apply.

Remember, an order made before October 1, 2025 does not update itself, though a gap between the old figure and the current one can support an argument for a review.

How to work out the child support number, step by step

1. Confirm whether you are married or unmarried, and which guidelines govern.

2. Identify the payor's guideline income, starting at line 15000 of the tax return.

3. Count the children covered, noting any child near or past 18.

4. Confirm the payor's province of residence, since the table follows them.

5. Look up the current Alberta table amount for that income and number of children.

6. Decide whether parenting is sole, shared or split, and adjust if it is not sole.

7. List the section 7 expenses, net of subsidies, benefits and credits.

8. Divide that total in proportion to the parents' guideline incomes.

9. Record both figures in an agreement or court order.

10. Diarize an annual exchange of income information.

How is income determined for child support?

Guideline income drives the calculation, and it is where most disputes live. The starting point is line 15000, total income, on the payor's T1 tax return, and parents are generally expected to exchange three years of returns and notices of assessment.

The guidelines then allow adjustments. Non-recurring amounts such as a bonus, severance or a capital gain may be treated differently from steady salary, because the question is what the payor can fairly be expected to earn going forward.

Self-employed parents and parents who control a corporation face closer scrutiny. A court can look past the salary a shareholder draws, consider pre-tax corporate income, and add back personal expenses run through the business. Where a parent is intentionally under-employed without good reason, or will not produce documents, a court can impute income based on what that parent could earn. The Family Focused Protocol now requires financial disclosure before most Court of King's Bench family filings, as our Alberta Family Focused Protocol guide explains.

What are section 7 special and extraordinary expenses?

Section 7 special and extraordinary expenses sit on top of the table amount because the table does not account for them. The categories are child care needed so a parent can work or study, the child's share of medical and dental premiums, uninsured health costs above a modest annual threshold, extraordinary school expenses, post-secondary education, and extraordinary extracurricular activities.

Two filters apply. The expense must be necessary in relation to the child's best interests, and reasonable given the means of both parents and the family's spending pattern before separation.

These expenses are shared in proportion to the parents' guideline incomes, after deducting any subsidy, benefit or tax credit that reduces the real cost. Because benefits shift on separation, read how divorce affects the carbon rebate and child benefits in Alberta first.

What happens to child support in shared parenting?

Shared parenting is addressed by section 9 of the guidelines, which applies where each parent exercises not less than 40 percent of parenting time over a year. Counting that 40 percent is often contested, and courts have measured it by overnights, by hours, or by responsibility.

Once section 9 applies, the amount is not automatically the difference between what each parent would pay the other. That set-off is only the first of three factors. A court must also weigh the increased costs of the shared arrangement, because two households equipped for children cost more than one, and the conditions, means, needs and other circumstances of each parent and child. The result is discretionary, and a higher amount is common where the income gap between the homes is large.

What about split parenting?

Split parenting, addressed by section 8 of the guidelines, applies where each parent has the majority of parenting time for at least one child. It is less common than shared parenting, and often arises with older teenagers.

Each parent's table amount is calculated for the children in the other parent's primary care, and the parent with the higher figure pays the difference. Section 7 expenses are still shared proportionately.

Does child support stop at 18?

Child support in Alberta does not automatically end when a child turns 18. It can continue for a child in full-time education, or one who cannot withdraw from parental charge because of illness, disability or another cause.

For a child over the age of majority, the guidelines give a court a choice. It can order the usual table amount, or, if that would be inappropriate, set an amount reflecting the child's condition, means, needs and circumstances and each parent's ability to contribute. For a university student that often means a budget covering tuition, residence, the child's earnings, scholarships and loans. Remember, stopping payments on the assumption that the obligation ends on a birthday is a common source of arrears.

Can you reduce child support for undue hardship?

Undue hardship is a narrow provision in section 10 of the guidelines, and it rarely succeeds. A parent seeking a lower amount must first prove a specific hardship, such as unusually high debts reasonably incurred to support the family, high costs of exercising parenting time, or a duty to support another child.

The parent must then show their household standard of living is lower than the other parent's, using a comparison test in the guidelines. Many applications fail here, and it catches people by surprise: a new partner's income counts in the comparison.

What is retroactive child support?

Retroactive child support is an order covering a past period when the correct amount was not paid. It usually comes up because a payor's income rose and nobody adjusted the number.

The Supreme Court of Canada set the framework in D.B.S. v. S.R.G., 2006 SCC 37, which directs courts to weigh the delay in asking, the payor's conduct, the child's circumstances, and any hardship the award would cause. Blameworthy conduct, including failing to disclose an income increase, generally allows a court to reach further back. In Michel v. Graydon, 2020 SCC 24, the Court confirmed a claim can be brought even after the support obligation has ended.

Both parents have an ongoing duty to share income information, and a payor who keeps paying an outdated amount after a raise is building exposure. That is why an annual exchange of tax returns is worth putting in writing.

How is child support enforced in Alberta?

Child support in Alberta is enforced by the Maintenance Enforcement Program (MEP), a provincial program that registers support orders and written agreements, collects payments and pursues arrears. Either parent can register, and registration is free.

Once a file is registered, MEP can garnish wages and bank accounts, intercept federal payments, register against land, suspend a driver's licence, report to credit bureaus and ask the federal government to deny a passport. The process is set out on the Alberta government's Maintenance Enforcement Program page. Parents who pay reliably often keep the arrangement private and register later only if payments falter.

How do you change child support in Alberta?

Child support in Alberta can be changed when there has been a material change in circumstances, most often a change in the payor's income, a change in the parenting arrangement, or a child ceasing to be eligible. There are three routes.

The first is agreement. If both parents accept a new figure it can be filed as a consent order, and time-sensitive consent orders can proceed through the Desk Process under the Family Focused Protocol rather than a court appearance. The second is the Alberta Child Support Recalculation Program, which recalculates the table amount and the proportionate share of section 7 expenses each year from updated tax information. Eligibility conditions apply. The third is a court application, the route when income itself is in dispute. Our child support services page sets out how the team at Demas Schaefer approaches each option.

Frequently asked questions

How much child support will I have to pay in Alberta?

The base amount comes from the Alberta child support table and depends on your guideline income, the number of children covered and your province of residence. On top of that you pay a proportionate share of section 7 expenses, such as child care and tuition.

Do I still pay child support if we share the children equally?

Usually yes, if there is an income difference. Where each parent has at least 40 percent of parenting time, section 9 of the guidelines applies. The starting point is the difference between what each parent would owe the other, plus the cost of two households.

Does child support stop when my child turns 18 in Alberta?

No, not automatically. Support can continue for a child over 18 in full-time education, or who cannot become self-supporting because of illness or disability. For an adult child a court can order the table amount or set a different amount based on the child's budget.

What happens if my ex will not disclose their income?

A court can impute income, meaning it sets support on a figure it decides the parent is capable of earning rather than what they have proven. Non-disclosure can also lead to costs awards and retroactive orders reaching further back. Disclosure is an ongoing obligation.

Can I claim child support for past years?

Often yes. A retroactive claim asks a court to correct a period when the wrong amount was paid. Courts weigh the reason for the delay, the payor's conduct, the child's circumstances and any hardship the award would cause. Claims are possible even after support ends.

Do I have to use the Maintenance Enforcement Program?

No. Registration with Alberta's Maintenance Enforcement Program is voluntary and free, and either parent can register a support order or filed written agreement. Many parents with a reliable payment history handle payments directly. If payments become irregular, you can register then.

Can we just agree that no child support will be paid?

Agreements waiving child support entirely are difficult to sustain, because support is treated as the right of the child rather than the parent who receives it. A court reviewing the agreement will ask whether the children are adequately provided for, and can set the term aside.

Talk to an Edmonton family lawyer

Money worries after separation are real, and child support is often the number that decides whether the month works. If you are settling a first amount, responding to a retroactive claim, or updating an order that has not moved in years, it helps to have the figures reviewed before you commit. Demas Schaefer Family Lawyers is an Edmonton firm that focuses exclusively on family law, serving Edmonton, St. Albert, Sherwood Park and the rest of Alberta. We offer a free 15-minute telephone or video consultation so you can see how we can help. Call 780-423-2643 or set up an appointment with one of our family lawyers.

About the author

Graeme Kluge is Counsel at Demas Schaefer LLP in Edmonton, Alberta. His work covers child and spousal support, parenting arrangements and family property. Read more on Graeme Kluge's profile.

Last reviewed: September 7, 2026.

This article provides general information about family law in Alberta and is current as of September 7, 2026. It is not legal advice and does not create a lawyer-client relationship. Family law outcomes depend on the specific facts of each case. If you need advice about your own situation, speak with a lawyer.