Well you can't fix the lack of savings now, so its how you move forward that counts. If you want to continue the relationship, sit down together and review your incomings and outgoings, check you credit files, full transparency for you both. Tell him that if he won't or doesn't adhere to it, it maybe time for you to separate.
Then decide what you can both afford to put aside each month and tell him to open a savings account for this specific purpose and then he sets up a standing order to transfer the money to the savings account as soon as he is paid. Every few months you can review what you are saving, There maybe some months you can put more in and some it will be less i.e Christmas.
If you buy together, own it as Tenants in Common as then you each own a defined share of the property (e.g., 70/30, 60/40, 80/20). Shares can reflect unequal deposits or unequal mortgage contributions. If one of you dies, your share goes to whoever you name in your will, not automatically to your partner. Good for Protecting a larger deposit, blended families, couples who want clarity and fairness, Avoids disputes if the relationship ends
You pair this with a Declaration of Trust (also called a Deed of Trust). This document sets out:
- Who put in what
- Who owns what percentage
- How equity will be divided if you sell
- What happens if one partner pays more of the mortgage later
This is the standard, sensible route for unmarried couples with unequal contributions.