Rent Affordability Calculator
Work out what you can actually afford from TAKE-HOME pay, debts and the full cost of occupying a home — not from the gross-income rule a landlord uses to screen you.
Rent Affordability Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- Take-home pay must be entered — deductions are too individual to estimate.
- Excludes irregular costs such as moving and furnishing from the monthly figure.
- Local market conditions may make every test unattainable.
In short: The 30% rule is a landlord's risk metric, not your budget. On 72,000 gross it permits 1,800 — but that is 39.8230% of your 4,520 take-home, and 525 of debt payments cuts the real ceiling to 1,635.
Formula
gross rule: 0.30 × gross monthly
back-end: 0.36 × gross − other debt payments
[('gross rule', 'what a landlord screens against'), ('net rule', 'what you can actually pay'), ('28/36', 'the lender test that counts your debts'), ('all-in', 'rent plus utilities, insurance and fees')]
Worked Example
- Take 30 per cent of gross — the landlord's test.
- Take 30 per cent of take-home — your test.
- Subtract existing debt payments from the 36 per cent cap.
- Use the LOWEST of the three.
- Add utilities, insurance and fees for the real cost.
On 72,000 gross — 6,000 a month — the 30% rule permits 1,800. But take-home is 4,520 after 24.6667% of deductions, so 30% of net is only 1,356, and renting at 1,800 would be 39.8230% of take-home. With 525 of debt payments the 28/36 back-end test allows 1,635, which is the binding constraint. A 1,650 rent plus 278 of utilities, insurance and parking is 1,928 all-in — 42.6549% of take-home against 32.1333% of gross. Move-in needs 3,300 plus a 5,784 reserve.
Strengths & Limits Of This Model
Where this engine is strong
- Reports the binding constraint rather than the friendliest
- Separates the landlord's screening rule from your budget
- Prices all-in housing cost against take-home pay
Where it stops
- Requires knowing your net pay
- US-oriented conventions
Practical Use Cases
Setting a search budget
Finding the rent your take-home actually supports.
Checking a landlord's approval
Seeing whether approved means affordable.
Planning a move
Sizing the cash needed before signing.
Weighing a raise
Testing what extra income really unlocks.
Debt payoff planning
Seeing how much rent a cleared loan frees.
Methodology & Editorial Standards
Three tests are computed and the LOWEST is reported, because the binding constraint is the one that governs. The gross rule is presented as what a landlord screens against; the take-home rule and the 28/36 back-end test are presented as what a budget sustains. All-in housing cost adds utilities, insurance and fees to base rent and is expressed against both gross and net income, since the gap between those two figures is the practical point of the page.
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Rent Affordability Calculator — 10 Expert FAQs
10 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
How much rent can I afford?
Take the lowest of thirty per cent of gross, thirty per cent of take-home, and thirty-six per cent of gross less your existing debt payments. The gross rule is what landlords screen on; the other two are what your budget can actually sustain, and one of them usually binds first.
Why is the 30% rule based on gross income?
Because gross is standardised and verifiable while net varies with everyone's deductions and retirement choices. That makes it a sound screening tool for a landlord and a poor budgeting tool for a tenant, since you pay rent from take-home rather than from your salary on paper.
Is the 30% rule outdated?
It remains the standard because it is simple and it defines cost burden in housing policy, but it ignores taxes, deductions and debts entirely. Treat it as an upper limit imposed by others rather than a target you are aiming for.
What is the 28/36 rule?
A lending test: no more than twenty-eight per cent of gross income on housing and no more than thirty-six per cent on all debt obligations combined. Applied to renting, it captures something the thirty per cent rule misses — that a significant loan payment reduces what you can spend on housing.
Should I include utilities in my rent budget?
Always. Utilities, renter's insurance, parking and any pet or amenity fees are part of the cost of occupying the property, and together they commonly add ten to twenty per cent to the advertised rent. Budgeting on base rent alone is how people end up short.
How much should I save before renting?
Enough for the first month, the deposit, and at least three months of all-in housing cost as a reserve. Application fees, moving costs and basic furnishing sit on top, and a reserve is what turns a lost job or a broken car into an inconvenience rather than an eviction.
Does a landlord approving me mean I can afford it?
No, and this is the central point. Landlords screen on gross income to manage their own default risk, and their threshold sits well above what most budgets comfortably sustain. Approval is a statement about their risk, not about your finances.
What if rent is more than 30% of my income?
Very common, particularly in expensive metros, and it is workable if you have no debts and modest other costs. What it removes is margin: at above forty per cent of take-home there is little room for saving or for anything unexpected.
Do roommates change the calculation?
Substantially, and sharing is usually much cheaper per person than a smaller place alone. Be aware that most leases are joint and several, meaning you can be liable for the whole rent if a roommate stops paying — so screen them as carefully as a landlord would.
Should I count bonuses and overtime?
Landlords often will, if you can document a history. For your own budget it is safer to base fixed commitments on reliable base pay and treat variable income as a buffer, because rent is due whether or not the bonus arrives.