Personal finance
What's left after rent, Turo, and groceries?
Quick surplus estimate — connect Lane to track Turo payouts, rent, loans, insurance, and everyday spending automatically.
Run the numbersMonthly inputs
Upgrade from a spreadsheet: connect your bank in Lane and replace manual totals with synced transactions.
Monthly snapshot
- Surplus before savings
- $1100
- After savings goal
- $600
- Savings rate target
- 9.6%
See your finances
Cashflow, spending, categories, and recent transactions — the same widgets you use in the app, synced from your bank.
Sample data for illustration
How it works
- 1
Enter monthly take-home income
Use net pay after tax — the amount that actually lands in checking, not gross salary.
- 2
List fixed and flexible expenses
Rent, utilities, subscriptions, groceries, transport, and debt payments. Round to keep the calculator fast.
- 3
See surplus and savings rate
We subtract spending from income and show what is left to save, invest, or buffer — a starting point before full budgeting rules.
- 4
Sync real numbers in Lane
Connect US accounts through Plaid in Lane so income and spending update automatically instead of re-entering a monthly budget spreadsheet.
What each input means
- Monthly income
- Combined take-home from salary, side income, and regular deposits you treat as income.
- Housing & utilities
- Rent or mortgage plus electric, internet, and phone — the bills that rarely flex month to month.
- Food & transport
- Groceries, dining out, fuel, transit, and rideshare — often the first categories to tune after tracking.
- Other spending
- Subscriptions, shopping, health, travel, and debt payments not captured above.
Example: $6,200 take-home
- $1,850 housing & utilities
- $780 food & transport
- $640 other spending
- Total expenses $3,270 → $2,930 monthly surplus (~47% savings rate)
A positive surplus means room for goals; negative means tracking in Lane to find leaks before setting strict budget caps.
This is a monthly budget calculator, not envelope budgeting. Lane focuses on tracking first — see where money went, then decide rules.
When you connect banks, categorized transactions roll into cashflow charts on the dashboard.
Flexible budgets and goal planning are coming; tracking and AI chat on your real data are live today.
Related guides
Frequently asked questions
Is this the same as the 50/30/20 budget rule?
You can compare your surplus to 50/30/20 mentally, but this calculator uses your actual expense buckets — not preset percentages.
Does Lane support zero-based budgeting?
Not yet. Lane is tracking-first. Use this calculator to sanity-check monthly cashflow before full budget features ship.
Will Lane import my spreadsheet?
No manual import required — Plaid syncs US checking, savings, and credit cards. CSV export is available on Pro.
Is the budget calculator free?
Yes. Connecting accounts and ongoing tracking require a Lane subscription after the free trial.
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Trusted by people who want clarity
Personal finance and side-business tracking — synced from your bank, not manual entry.
“I used to export CSVs every Sunday and still couldn't tell if I was up for the month. Lane synced my accounts in a weekend—now I ask where the money went instead of guessing.”
“Turo payouts and groceries lived in one checking account. I spent months wondering if renting was worth it — the profit dashboard finally let me answer yes, with numbers, not guesswork.”
“Mint shut down and Credit Karma wasn't the same. Lane doesn't sell ads—it just shows synced cashflow and net worth. Budgeting isn't all here yet, but I finally see the full picture.”
Know if your Turo car is actually profitable
Trip payouts, car payments, insurance, loans, fuel, and cleaning — synced from your bank, not guessed.