Monthly budget breakdown against the 50/30/20 rule.
How to use this calculator
Every field updates the result as you type — there is no submit step. The inputs below are pre-filled with a realistic example so you can see how the tool behaves before entering your own figures.
| Field | Unit | What it means |
|---|---|---|
| Monthly take-home income | $ | Enter a numeric value. |
| Housing | $ | Enter a numeric value. |
| Utilities | $ | Enter a numeric value. |
| Food & groceries | $ | Enter a numeric value. |
| Transport | $ | Enter a numeric value. |
| Insurance & healthcare | $ | Enter a numeric value. |
| Debt payments | $ | Enter a numeric value. |
| Entertainment & discretionary | $ | Enter a numeric value. |
| Savings & investments | $ | Enter a numeric value. |
| Other | $ | Enter a numeric value. |
Worked example
Using the default values loaded into the calculator above, the result is:
| Input | Value |
|---|---|
| Monthly take-home income ($) | 5200 |
| Housing ($) | 1600 |
| Utilities ($) | 250 |
| Food & groceries ($) | 600 |
| Transport ($) | 400 |
| Insurance & healthcare ($) | 300 |
| Debt payments ($) | 350 |
| Entertainment & discretionary ($) | 500 |
| Savings & investments ($) | 800 |
| Output | Value |
|---|---|
| Left over each month | $250.00 |
| Needs — actual | $3,150.00 (60.6%) |
| Needs — 50% target | $2,600.00 |
| Wants — actual | $650.00 (12.5%) |
| Wants — 30% target | $1,560.00 |
| Savings & debt — actual | $1,150.00 (22.1%) |
| Savings — 20% target | $1,040.00 |
Reading the result
Financial projections compound small assumption changes into large differences over time. Rates, fees and tax treatment vary by lender and jurisdiction, so treat the output as a well-structured estimate for comparing options rather than a quotation.
Figures that change annually — tax bands, contribution limits, statutory rates — are exposed as editable inputs. Check them against current published values before relying on the result.
Sharing and saving a calculation
The "Copy link" button encodes every value you have entered into the page URL. Opening that link restores the calculation exactly, which makes it easy to bookmark a scenario, send it to someone else, or keep several variations side by side in separate tabs.
Frequently asked questions
What does the Budget Calculator do?
Monthly budget breakdown against the 50/30/20 rule.
What result do the default values produce?
With the values pre-loaded in the calculator, left over each month comes to $250.00.
Is this calculator free to use?
Yes. It is free, requires no account, and runs entirely in your browser — nothing you enter is transmitted or stored on a server.
Can I save or share a calculation?
Yes. The "Copy link" button builds a URL containing all your entered values. Anyone opening that link sees the same calculation.
How accurate is the result?
The calculation itself is exact for the inputs given. Real-world accuracy depends on how well those inputs reflect your actual situation, so review the assumptions before relying on the figure.