Free tools
Money tools for couples and shared households
Six free calculators for the money questions two people actually argue about: what is a fair split, who pays which bill, what food should cost, and whether moving in together adds up. No sign-up, nothing stored, and every result can be shared as a PDF or a link.
Couples' fair-share calculator
Split rent, bills and groceries in proportion to what each of you earns, and see what each person keeps afterwards.
Use it when: You earn different amounts and 50/50 feels off.
Open tool“Who pays what?” monthly planner
Assign each bill to one person, check it against a fair target and get the single monthly transfer that balances the month.
Use it when: You want fewer split payments and one standing order.
Open toolShared grocery budget estimator
A realistic monthly and weekly food budget for your household size, shopping style and local prices, with a per-person share.
Use it when: Food spending feels high and nobody knows what normal is.
Open toolLiving together vs. living alone
Put two solo budgets next to one shared budget and see the monthly and yearly difference, plus where the saving comes from.
Use it when: You are deciding whether to move in together.
Open toolRent split calculator
A quick income-weighted rent split for partners or roommates, next to the 50/50 version.
Use it when: You only need to settle the rent.
Open toolMoney conversation starter
A question deck for couples and co-parents, sorted by relationship stage and topic.
Use it when: The numbers are fine but the conversation is stuck.
Open toolWhich one should you start with?
- Just moving in together? Start with the living together comparison, then agree a split with the fair-share calculator.
- Already sharing, but it feels lopsided? The fair-share calculator gives you a number to talk about instead of a feeling.
- Tired of splitting every payment? The who pays what planner turns it into one standing order.
- Food is the flashpoint? The grocery estimator tells you whether your spending is actually unusual.
Keep the answers in one calm place
SharedNest holds your split, your shared bills and your goals for the two of you — free while we build it.
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