The short answer
- Money left after bills = take-home pay − fixed monthly bills. That is what pays for groceries, fuel, surprises and savings.
- Economists call income after taxes "disposable income". What most people mean is one step further: income after taxes and unavoidable bills. Lenders call that residual income.
- VA home loans in the US use a published residual income table: for loans of $80,000 or more, a family of four in the South needs at least $1,003 a month left.
- UK mortgage lenders must check your committed and essential spending, not just your salary, under the FCA's MCOB rules.
- To compare households of different sizes, divide by an equivalence scale rather than by the number of people.
Three names for nearly the same idea
The phrase "disposable income" gets used loosely, and that causes confusion.
| Term | What is subtracted | Who uses it |
|---|---|---|
| Disposable personal income | Personal current taxes only | Statisticians (the US Bureau of Economic Analysis) |
| Money left after bills | Taxes, then rent or mortgage, utilities, insurance, debt payments, childcare, subscriptions | You, when you budget |
| Residual income | Taxes, housing costs, debts and other obligations, per the lender's method | Mortgage lenders, notably the VA |
Disposable personal income
What is subtractedPersonal current taxes only
Who uses itStatisticians (the US Bureau of Economic Analysis)
Money left after bills
What is subtractedTaxes, then rent or mortgage, utilities, insurance, debt payments, childcare, subscriptions
Who uses itYou, when you budget
Residual income
What is subtractedTaxes, housing costs, debts and other obligations, per the lender's method
Who uses itMortgage lenders, notably the VA
In the BEA's definition, disposable personal income is personal income minus personal current taxes: the money available for spending or saving. Rent and car payments are still inside it. For a household budget that number is too generous, so this guide uses the second line: what is left once the bills that leave your account automatically are paid.
If you already keep a monthly budget, this is its second line: what comes in, minus what goes out whether you like it or not.
The formula, line by line
Left after bills = monthly take-home pay − monthly fixed bills
Income side: count what actually lands in your account. Salary after tax, National Insurance or payroll deductions, pensions, benefits, child support received, rental income. If your pay varies, use the average of the last twelve months, or better, your weakest month.
Bills side: everything that leaves without a fresh decision from you.
- rent or mortgage (including escrow for property tax and insurance in the US);
- council tax (UK), HOA dues (US);
- energy, water, phone and broadband;
- insurance: car, renters or buildings, and health premiums not already taken from pay;
- loan payments and card minimums;
- childcare;
- subscriptions and memberships.
Convert annual and quarterly bills to monthly: a $900 annual car insurance premium is $75 a month. Irregular but predictable costs, like car servicing or birthdays, are easier to handle with sinking funds.
Three worked examples
Hannah, single, Manchester. Take-home pay: £2,300.
| Fixed bills | Amount |
|---|---|
| Rent | £850 |
| Council tax | £140 |
| Energy | £110 |
| Water | £40 |
| Phone and broadband | £45 |
| Contents insurance | £25 |
| Travel pass | £90 |
| Credit card minimum | £60 |
| Total | £1,360 |
Rent
Amount£850
Council tax
Amount£140
Energy
Amount£110
Water
Amount£40
Phone and broadband
Amount£45
Contents insurance
Amount£25
Travel pass
Amount£90
Credit card minimum
Amount£60
Total
Amount£1,360
Left after bills: £2,300 − £1,360 = £940, about £31 a day over a 30-day month.
Marcus and Dana, couple, Columbus, Ohio. Take-home pay: $5,600 combined. Bills: mortgage with escrow $1,650, utilities $260, phones and internet $150, car insurance $180, car loan $390, student loan $210. Total $2,840. Left after bills: $5,600 − $2,840 = $2,760.
The Okafor family, two adults and two children aged 5 and 10, Birmingham. Take-home pay including benefits: £4,100. Bills: rent £1,250, council tax £170, energy £160, water £50, childcare £450, phones and broadband £80, insurance £45, transport £220, personal loan £150. Total £2,575. Left after bills: £4,100 − £2,575 = £1,525.
- Home and energy40 %£1,630Rent, council tax, energy, water
- Other fixed bills23 %£945Childcare, phones, insurance, transport, loan
- Left after bills37 %£1,525Food, clothes, fun, surprises, savings
Per person, or per "equivalent adult"?
Dividing by the number of people makes large families look poorer than they are: two adults don't cost twice as much as one, and a five-year-old costs less than a teenager. The OECD-modified scale, used by Eurostat and national statistics offices, counts 1 for the first adult, 0.5 for each other person aged 14 or over, and 0.3 for each child under 14.
| Household | Left after bills | Scale | Per equivalent adult |
|---|---|---|---|
| Hannah | £940 | 1 | £940 |
| Marcus and Dana | $2,760 | 1.5 | $1,840 |
| The Okafors | £1,525 | 2.1 | £726.19 |
Hannah
Left after bills£940
Scale1
Per equivalent adult£940
Marcus and Dana
Left after bills$2,760
Scale1.5
Per equivalent adult$1,840
The Okafors
Left after bills£1,525
Scale2.1
Per equivalent adult£726.19
Per head, the Okafors have £381.25 each; per equivalent adult, £726.19. That second number is the fairer comparison with Hannah. No official body publishes a "healthy" amount per equivalent adult for personal budgets, so treat this as a way to compare, not a pass mark.
How US lenders use residual income
Most US mortgage lenders look first at the debt-to-income ratio. The federal ability-to-repay rule (Regulation Z, 12 CFR 1026.43) lists "the consumer's monthly debt-to-income ratio or residual income" among the factors a lender must consider, so residual income is allowed as the yardstick, but it is not the usual one.
The VA home loan program is the exception: it publishes minimums. Under 38 CFR 36.4340, residual income is what remains to cover living expenses after estimated shelter costs and other monthly obligations. For loans of $80,000 and above:
| Family size | Northeast | Midwest | South | West |
|---|---|---|---|---|
| 1 | $450 | $441 | $441 | $491 |
| 2 | $755 | $738 | $738 | $823 |
| 3 | $909 | $889 | $889 | $990 |
| 4 | $1,025 | $1,003 | $1,003 | $1,117 |
| 5 | $1,062 | $1,039 | $1,039 | $1,158 |
1
Northeast$450
Midwest$441
South$441
West$491
2
Northeast$755
Midwest$738
South$738
West$823
3
Northeast$909
Midwest$889
South$889
West$990
4
Northeast$1,025
Midwest$1,003
South$1,003
West$1,117
5
Northeast$1,062
Midwest$1,039
South$1,039
West$1,158
Add $80 for each extra member, up to a family of seven. Lower amounts apply to loans under $80,000. The same rule sets a 41% debt-to-income benchmark; above it, if residual income beats the table by at least 20%, the lender does not need a second-level review and written justification.
Worked example: a family of four in Texas (South), loan above $80,000. Gross monthly income $7,000; taxes and payroll deductions $1,450; proposed mortgage payment with taxes and insurance $1,900; estimated maintenance and utilities $350; car loan $420; student loan $230. Residual income: $7,000 − $1,450 − $1,900 − $350 − $420 − $230 = $2,650, well above the $1,003 minimum. Debt-to-income: ($1,900 + $420 + $230) ÷ $7,000 = 36.43%. This is an illustration only; lenders apply their own detailed method.
How UK lenders check affordability
UK lenders don't publish a residual income table, but the FCA's Mortgages and Home Finance: Conduct of Business rules make them do the same calculation. Under MCOB 11.6.5, a lender must take full account of your income net of income tax and National Insurance, your committed expenditure (credit and other contractual commitments that continue after the mortgage starts), and your household's basic essential expenditure and basic quality-of-living costs. The first covers housekeeping, utilities, council tax, insurance and essential travel; the second covers harder-to-cut spending such as clothing, household goods and childcare. Unless the rate is fixed for five years or more, lenders must also test affordability over at least five years and assume rates rise by at least 1 percentage point over that period (MCOB 11.6.18).
In debt advice, UK charities use a common income and expenditure form, the Standard Financial Statement, run by the Money and Pensions Service. It is meant for advisers, not for the public, but it follows the same logic: income, then priority bills, then what is left for creditors.
How to raise what's left
Fixed bills are usually easier to move than income, and a cut made once pays every month.
- 1Audit your subscriptionsPull three months of statements and cancel what you don't use. Three $12 subscriptions give back $36 a month.
- 2Re-shop insurance and broadbandComparing quotes takes an evening; ask your current provider to match the best one before you switch.
- 3Check benefits and creditsIn the UK, the free benefits calculators listed on GOV.UK take minutes. In the US, check local and state programs before assuming you don't qualify.
- 4Clear a small debt firstPaying off a short loan frees a whole monthly payment. Our guide to the debt snowball and avalanche compares the two methods.
- 5Get free advice earlyStepChange, National Debtline and MoneyHelper (UK) and nonprofit NFCC counselors (US) help at no or low cost.
If there is almost nothing left and you run out before payday, start with our guide to living paycheck to paycheck: it covers week-by-week cash planning and free help. If debt payments are the problem, see debt snowball vs avalanche.
Tracking it through the month
The number you calculate on payday shrinks with every grocery run. Tracking it means logging what you spend against what you planned.
With Binome360, you save fixed bills once as recurring items, then log each expense in a sentence or by voice. A budget per category shows what is left for food or going out. The app does not connect to your bank: you log, your assistant prepares the record, and nothing is saved until you confirm.
Rent £850 on the 1st, council tax £140 on the 5th, broadband £30 on the 12th, every month
Ready: three monthly recurring expenses, Rent £850 on the 1st, Council tax £140 on the 5th, Broadband £30 on the 12th. Total £1,020 a month. Save them?
Nothing is saved until you confirm, and no money moves.
Try it free for 7 daysFrequently asked questions
What is a good amount of disposable income after bills?
There is no official figure for personal budgets. The VA table is the closest published benchmark, and it is a lending floor, not a comfortable living standard. A more useful test: does what is left cover food, transport and clothing, plus something for savings, every month?
Is disposable income before or after rent?
In official statistics, before: disposable income is income after taxes only. In everyday budgeting and in lender calculations, rent or the mortgage is taken out, which is why "residual income" or "money left after bills" is clearer.
How do lenders calculate residual income?
VA lenders start from gross income and subtract taxes, the proposed housing payment, maintenance and utilities, and monthly debts, then compare the result with the table for your region and family size. Other US and UK lenders run similar affordability checks with their own methods.
Should groceries count as a bill?
No. Groceries come out of what is left. That is why the number must cover food and everyday costs before you plan any savings.
In short
Money left after bills is take-home pay minus the bills that leave automatically. It tells you more than a percentage, and it is the same logic VA and UK lenders apply before they lend. First action: tonight, list every direct debit and standing order for this month and subtract the total from your last payslip.
Sources
- U.S. Bureau of Economic Analysis, glossary, "Disposable personal income": bea.gov.
- Code of Federal Regulations, 38 CFR § 36.4340, "Underwriting standards, processing procedures, lender responsibility, and lender certification" (residual income table, 41% ratio), 2025 edition: govinfo.gov.
- Code of Federal Regulations, 12 CFR § 1026.43 (ability-to-repay factors), 2025 edition: govinfo.gov.
- Financial Conduct Authority, FCA Handbook, MCOB 11.6 "Responsible lending and financing": handbook.fca.org.uk.
- Money and Pensions Service, "What is the Standard Financial Statement?": standard-financial-statement.maps.org.uk.
- INSEE, definition "Unité de consommation" (OECD-modified equivalence scale): insee.fr.
- Binome360 calculations for the worked examples (fictional cases), October 2026.
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