How does this monthly budget calculator work?

Enter your net monthly income and spending by category. The tool totals each group, shows leftover cash, and flags if essentials exceed income.

Which categories are included?

Income and housing, household bills, living and transport, insurance and dependants, plus debts, savings and a safety buffer.

Can I use the results in other calculators?

Yes. You can reuse your affordable monthly figure in our first-time buyer affordability tool or savings planners.

Does it support the 50/30/20 rule?

You can compare your categories to 50/30/20 proportions to see where adjustments might help.

Is this financial advice?

No. It is an educational tool. Figures are indicative and depend on your specific circumstances.

OPTIMLY Calculators | Monthly Household Budget Calculator

Household income

Net monthly income (you):

Other household net income:

Bonus / commission (monthly average):

Child benefit (monthly):

Other benefits / tax credits (monthly):

Other income (side jobs, maintenance, rental):

Income & housing

Mortgage payment or rent:

Service charge & ground rent (monthly):

Household bills

Council tax (monthly):

Gas (monthly):

Electricity (monthly):

Water (monthly):

Broadband & TV (monthly):

Mobile phones (all, monthly):

Groceries and eating out

Groceries & household:

Dining out & takeaway:

Entertainment

TV & media subscriptions:

Gym & fitness:

Socialising & nights out:

Hobbies & leisure:

Transport

Car finance (monthly):

Fuel (petrol/diesel/EV charging):

Vehicle tax (avg/month):

MOT & servicing (avg/month):

Tyres & wear and tear (avg/month):

Parking, tolls & congestion:

Train commuting (season ticket):

Public transport (bus/tram/other):

Children & dependants

School fees (tuition):

Childcare / nursery / after-school:

School costs (meals, clubs, trips):

Clothes & uniforms (avg/month):

Other dependant costs:

Activities & lessons (sports, music, tutoring):

Insurance

Home & contents insurance (monthly):

Life insurance (monthly):

Income protection / critical illness:

Other insurance (car, pet, etc.):

Debts, savings & buffer

Credit card repayments (monthly):

Loan repayments (personal/car, monthly):

Regular savings / investments (optional):

Safety buffer (% of net income):