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Moving in with a new partner

Moving in with a new partner is an exciting step, but introducing them into your children’s lives can sometimes be challenging. Everyone will react differently, and you may also need to navigate your relationship with your child’s other parent.

Planning ahead and being prepared can make the transition smoother for everyone. Our tips will help you manage some of the practical aspects of moving in together.

Helping your family adjust

Your new living arrangements

Your rights

Changing finances

Making a living together agreement

Hear Kate’s story and advice

Kate shares her experience of repartnering and top tips for anyone thinking of making the move themselves.

Helping your family adjust

Once you and your new partner have decided to move in together, it’s important to have an open conversation with your children. They’ll likely want to understand what this change means and how things might be different. They’ll need time to get used to having a step-parent, and your partner will want to feel like a part of the family too.

Family Lives, a charity dedicated to supporting families, offers some helpful guidance for new stepfamilies:

If you or your children are struggling to adjust, help is out there. You could try family counselling through Relate to talk openly about your feelings and move forward together.

Your new living arrangements

 There’s no set amount of time you need to be together before moving in but it’s helpful to think about how much you share your lives, why you want to live together, and how your children might feel about having a new adult in the house. With the increased cost of living and higher rent prices, it can be tempting to move in with your partner to save money but it’s important to be sure you’re ready for that step.

Consider whether your new partner will move in with you, if you’ll move in with them, or if you’ll find a new place together. It’s important to think about how much space you need, what you can afford, how your children might feel about the move, and whether they can stay in the same school.

Your rights

It’s also important to think about what rights you’ll have around things like finances, property and children if you live together.

If you’re renting, your housing rights will depend on the type of tenancy you or your partner has and who is on the tenancy agreement. If you move into a home your partner owns or buy a place together, your rights and responsibilities will depend on whether you’re on the title deeds. Whether you rent or own your home, your housing rights are stronger if you’re married or in a civil partnership. 

Advicenow has lots of information for couples moving in together, including details about your rights when living together.

Changing finances

Moving in with a new partner will also bring changes to your finances, and that can get a bit tricky.

It’s important to talk about how you’re going to divide your finances. You might want to discuss:

  • How you’ll share the rent or mortgage, bills, and other expenses.
  • Whether you’ll set up a joint account or keep your finances separate. One option is to have a joint account for shared bills but keep the rest of your money separate.
  • Any debts you have, and how that will impact how you split costs.
  • Your different attitudes to money. It’s normal for one person to be a spender and the other a saver, but it’s essential to talk things through and agree on a budget for each month.

MoneyHelper offers tips on how to talk to your partner about money.

Benefits and tax credits

If you’re getting benefits, you and your new partner will be seen as a household. This may mean that some of your benefits will need to be reassessed to reflect your new circumstances. You can use one of our online benefits checkers to see how your new situation changes things.   

Here are some of the most common benefits and what you’ll need to do if you’re getting them.

  • Tax credits (these end on 5 April 2025) – let the tax credits helpline know that you’ve got a new partner living with you. You need to do this within 1 month of moving in together
  • Child Benefit – let the Child Benefit office know you have a new partner
  • Council Tax reduction – contact your local council to let them know you’re no longer the only adult in your household. This means your single person discount will no longer apply
  • Housing Benefit – you’ll also need to let your council know about the changes to your household if you’re getting help with housing
  • Universal Credit – report the change through your Universal Credit online account
  • Other benefits like Income Support, Jobseeker’s Allowance or Employment and Support Allowance – let Jobcentre Plus know that you’re living with a new partner

If you’re on Universal Credit, you’ll be getting extra money for your children (the child element). This generally only applies to your first 2 children. So if you and your new partner have more than 2 children between you, this might affect your Universal Credit. Our Universal Credit page has more.

Child maintenance

If you’re getting maintenance from your child’s other parent, your partner moving in won’t necessarily make a difference. Things might need to change if your children are going to be spending more or less time with their other parent.

If your new partner pays child maintenance to someone else, this will need to be reassessed. This is because the calculation should take into account that your new partner is now living with your children. Our page on using the Child Maintenance Service explains more about how maintenance is calculated. 

Making a living together agreement

You might want to consider creating a living together agreement (also called a cohabitation agreement). This document outlines what you and your partner own and share, helping you plan your finances. If things don’t work out, it can make untangling your situation easier.

While it might feel unromantic, it can protect both of you in the long run. It’s not legally binding unless you have it drafted by a solicitor, but courts generally follow it if it’s fair. Advicenow offers a guide to making a living together agreement, along with a template for what to include.

Date last updated: 21 March 2025

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