What Happens To Foster Children When They Turn 18? Staying Put – And Why It Matters For Long-Term Fostering  

A common fear for people considering fostering is that they will become too emotionally attached to a child who then has to move on. And it’s often an influencing factor for people considering whether to adopt a child or foster.

People thinking about becoming foster parents regularly ask us the same question: “What happens to the child when they turn 18?”.

It’s why the government introduced Staying Put – a national policy that allows young people to remain living with their foster family after turning 18, usually up to age 21 and sometimes beyond.

Its purpose is simple – to provide continuity, stability and the kind of steady support most young adults rely on from their families.

At Mosaic Foster Care, Staying Put isn’t an afterthought. It’s a natural extension of the long-term, therapeutic approach that underpins everything we do.

What is Staying Put? The practicalities explained

Staying Put allows a young person to remain living with their foster family after they turn 18, usually until age 21 (or longer if agreed), so they don’t have to move out at the point they legally become an adult.

A Staying Put arrangement is planned in advance during the young person’s Pathway Plan reviews. The local authority, the foster parent and the young person all discuss whether Staying Put is the right option and what support will be needed.

A formal Staying Put agreement is completed, outlining practical arrangements such as responsibilities in the home, finances, house rules, privacy and support, clarifying expectations for everyone.

Payments change slightly because the young person is now an adult, not a child in care. Foster parents receive a different financial package, and the young person may also receive benefits or financial support in their own right. Mosaic guides families through this so nothing feels unclear.

The local authority continues to provide a Personal Adviser for the young person and Mosaic remains involved when needed – particularly around emotional wellbeing and helping both sides manage the transition from fostering to semi-independent living within the same home.

Why Staying Put is a good option for many young people

Under Staying Put, a young person maintains the same stable home environment beyond 18. This allows them to build confidence gradually, rather than being rushed into independence.

The young person can access ongoing emotional and practical support while navigating early adulthood and remaining connected to a family that knows them well.

For many young people, this continuity can be the difference between a difficult start to adulthood and a confident one.

Why Staying Put matters at Mosaic Foster Care

1. It aligns with our commitment to long-term stability

Mosaic specialises exclusively in long-term fostering. From the moment a child joins a Mosaic family, the focus is on stability, secure attachments and long-term recovery. For us, staying through to adulthood is not unusual.

Because we work with children who have often faced significant disruption, ensuring they do not experience yet another major move at 18 can be critical. Staying Put gives them the chance to build on the consistent care they’ve already received.

2. It strengthens our therapeutic approach

The impact of trauma does not disappear on someone’s 18th birthday. Our SMILE therapeutic framework ensures support is available quickly when needed but the long-term healing process continues into adulthood.

Staying Put gives young people the time and space to consolidate the progress they have made during their teenage years.

3. Staying Put supports better life outcomes 

Research and frontline experience both show that young people who remain with their foster families beyond 18 are more likely to:

• Sustain education or employment.

• Maintain stronger emotional wellbeing.

• Develop healthier relationships.

• Avoid homelessness or crisis situations.

For Mosaic, this is central to our mission, giving each young person the best possible chance to thrive into adulthood.

4. It reflects the heart of how our foster parents care

Our foster parents regularly tell us their role doesn’t end when a young person turns 18. They remain a guiding presence – a safe base – in the same way any parent would. Staying Put formalises this instinctive commitment and ensures the right support continues around the whole family.

What is Staying Close and how is it different to Staying Put?

Staying Close is a model which provides an enhanced support package for young people leaving care from children’s homes and is designed to be a comparable offer to Staying Put.

Staying Close provides an offer of move-on accommodation, alongside a package of practical and emotional support, provided by a member of staff from their former children’s home or from someone who they know and trust.

Like Staying Put, Staying Close is designed to help develop the young person’s confidence and skills for independent living, as well as his/her health and wellbeing.

You can read more about Staying Close here.

A key component of Mosaic Foster Care’s offer

Staying Put is more than a policy. It’s a continuation of the relationships built over years of consistent, nurturing care.

At Mosaic, we are proud so many young people choose to remain with their foster parents beyond 18, and that our foster families continue to walk alongside them as they step into adulthood.

If you’re considering fostering and want to know what long-term fostering success looks like in practice, our team is always happy to talk you through how we support young people from childhood right through to adulthood – and beyond.

FAQs

What is Staying Put fostering? 

At Mosaic, Staying Put fostering allows a young person to remain living with you after they turn 18, so they don’t have to leave a safe, familiar family home simply because they have reached adulthood. A Staying Put arrangement is designed to provide continuity, stability, support and the kind of steady care that helps young people move into adult life with more security, belonging, trust and confidence. For us, staying put is a natural extension of our long-term fostering model. It helps the young person keep the relationships, attachment, community and environment that have supported their development, growth and wellbeing, rather than facing another sudden change at a critical stage of life. 

 

Who is eligible for Staying Put fostering? 

A young person is usually eligible for a Staying Put arrangement if they are already living with you as their foster carer and everyone agrees that remaining in the same home is the right option. At Mosaic, we look at this through Pathway Plan reviews, involving you, the young person, and the local authority, to decide what level of support, planning and practical arrangements will be needed. Eligibility is about more than age alone. We look at whether staying in the same family environment will support the young person’s wellbeing, independence, safety, development and longer-term progress, and whether it is the right fit for your household, your role as a carer, and the wider support available. 

 

How does Staying Put fostering work? 

At Mosaic, Staying Put is planned in advance rather than left until a young person’s 18th birthday. During Pathway Plan reviews, we work with you, the young person, and the local authority to discuss whether a Staying Put arrangement is the right option and what support, payments, guidance and practical planning will be needed. A formal agreement is then put in place. This usually covers responsibilities in the home, privacy, house rules, financial contributions, allowance changes, and what support services will continue. Because the young person is now legally an adult, the arrangement changes in practical ways, but our aim is to make that transition feel clear, well supported and manageable for everyone. 

 

What are the benefits of Staying Put fostering? 

The biggest benefit of Staying Put is continuity. Instead of being expected to move on suddenly, a young person can remain in a secure, nurturing family environment with people they know and trust. That gives them more time to strengthen relationships, build life skills, and move towards independence with the right support behind them. At Mosaic, we also see staying put as a way of protecting the progress already made through long-term foster care. It supports education, employment, emotional wellbeing, resilience and healthier development, while reducing the risk of homelessness, crisis or isolation. For many young people, that extra period of stability, connection and consistency can make a life-changing difference. 

 

Are there legal requirements for Staying Put fostering? 

Yes. A Staying Put arrangement needs to be planned properly and agreed through the right process. At Mosaic, that means it is discussed during Pathway Plan reviews and formalised through a written agreement that sets out practical expectations such as finances, privacy, house rules, household responsibilities and the support available to you and the young person. There are also wider regulations and local authority requirements that shape how staying put works in England. These include how the arrangement is reviewed, what payments or allowances apply, and what ongoing support is provided. We guide you through that clearly, so you understand the practical and legal side without feeling lost in the detail. 

 

How long can someone stay in a Staying Put arrangement? 

A young person can usually stay in a Staying Put arrangement until age 21, and in some situations it may continue beyond that if agreed. At Mosaic, we see this as an important part of helping young people move into adulthood in a steadier, more supported way, rather than expecting them to manage independence overnight. The exact timescale depends on the young person’s needs, their Pathway Plan, the local authority, and what is agreed through planning and reviews. For some, it is a shorter period of transition. For others, it becomes an essential bridge between fostering and independent adult living. 

 

How does Staying Put benefit young people? 

For young people, Staying Put offers something many of their peers take for granted: a secure home, reliable support, and ongoing family relationships while they learn how to manage adult life. Rather than facing a sudden break from everything familiar, they can continue living in a place where there is trust, attachment, security, protection and a genuine sense of belonging. At Mosaic, we know that emotional recovery and development do not stop at 18. Staying in the same home for longer can support better wellbeing, stronger resilience, healthier growth and improved outcomes in education, employment, budgeting and independence. It gives a young person the chance to keep building confidence in a safer and more realistic way. 

 

Who decides if a young person can stay put? 

This is not a decision made by one person. At Mosaic, the decision is discussed between you, the young person and the local authority during Pathway Plan reviews. We look at whether staying put is the right option, what support is needed and whether the practical arrangements are workable for everyone involved. The young person’s wishes matter, your view as their foster carer or staying put carer matters and the authority has a key role in approval, funding and oversight. We remain part of that process too, especially where there are concerns, emotional issues or important relationship factors to work through. 

 

What responsibilities do carers have? 

As a foster carer or staying put carer, your responsibilities shift slightly once the young person becomes an adult. You are still a key source of support, guidance, care, consistency and emotional security but the arrangement also needs to reflect the fact they are moving toward greater independence. That is why responsibilities, privacy, finances and expectations are set out clearly in the formal Staying Put agreement. At Mosaic, we also recognise your role goes beyond the practical. You remain a trusted adult, helping the young person manage change, sustain relationships, build resilience and continue developing the confidence and skills they need for adulthood, while still feeling part of a secure family and wider community. 

 

What happens when a Staying Put arrangement ends? 

When a Staying Put arrangement ends, the aim is for that move to be planned rather than abrupt. By that stage, the hope is the young person has had time to build confidence, life skills and greater independence, with the right support around housing, education, employment and everyday responsibilities. At Mosaic, we treat the end of staying put as another important transition point. The next step will depend on the individual situation, the young person’s needs and what has been agreed in their Pathway Plan, but the goal is always to protect their wellbeing, maintain important connections and avoid a sudden loss of support, family contact or community. 

 

What support is available for foster families? 

At Mosaic, we support the whole family, not just the individual carer. That includes therapeutic input through our SMILE framework, practical guidance, emotional support, and help during key periods of change, including the move from fostering to a Staying Put arrangement within the same home. We also help with the practical side of things, including payments, allowances, benefits, tax, national insurance, household contributions and general information about how the arrangement works day to day. Our role is to make sure you feel informed, supported and confident, whether you are dealing with planning, reviews, finances or emotional concerns. 

 

How long is the fostering process? 

At Mosaic, the fostering process usually takes around four to five months from your first enquiry to approval, although the timescale can vary depending on external checks and how quickly different parts of the process are completed. We know that can feel like a long wait but careful preparation is a key part of building long-term stability for children and foster carers alike. From the start, we provide clear information, honest answers, regular updates and step-by-step guidance. That means you understand what stage you are at, what comes next, and how we will support you through the full journey into foster care. 

 

What are the requirements for fostering? 

At Mosaic, there are some straightforward baseline requirements for fostering. You need to be at least 21, have a spare bedroom, be a full-time UK resident with the legal right to live and work here, and pass the relevant checks, including a DBS check. Most importantly, we are looking for people who can offer children care, safety, commitment, nurture and long-term stability. You do not need formal qualifications. We provide the training, support and professional guidance you need. What matters most is your ability to create a secure environment, build strong relationships and stay consistent when a child needs patience, protection, emotional support and time to settle. 

 

Where can I get support as a foster carer? 

At Mosaic, you can get support from us from your very first enquiry. We offer guidance by phone, email and live chat, and once you join us you will have access to our wider support services, including therapeutic support, training, regular check-ins, supervision and practical advice. You are not expected to do this alone. Our fostering service is built around strong communication, continuity and community, so you feel backed at every stage from your earliest questions to your first placement, to supporting a young person through adulthood, staying put and beyond. 

 

How is fostering different from adoption? 

The simplest difference is that fostering means caring for a child or young person as part of a wider framework of support, planning and professional involvement, while adoption is a permanent legal change to a child’s family status. In foster care, you provide day-to-day care, stability, nurture and support but other legal arrangements remain in place around the child. At Mosaic, our model is built around long-term fostering, therapeutic support, and helping children experience continuity, belonging, secure relationships and lasting trust. For many of our foster families, that support continues right through to Staying Put, which shows how deep the connection, commitment and sense of family can become. 

 

About Mosaic Foster Care

Mosaic Foster Care is an independent fostering agency providing Ofsted Outstanding rated therapeutic foster care across Essex, Suffolk, Bedfordshire including Milton Keynes, Hertfordshire, North Kent, Northamptonshire and Worcestershire. Our mission is to ensure every child in our care thrives in a stable, nurturing home. We achieve this by providing long-term foster placements and by carefully matching children and foster parents. We keep caseloads small and embed in-house professionally delivered therapy and youth support into everyday practice – so no child is ever left waiting for the critical support they need.  Foster parents receive more than £700 per week after training and benefit from ongoing professional development, and a community that truly understands the rewards and challenges of fostering.