See how much rent you can afford at the conservative, standard, and stretch levels based on your income, and what's left over for everything else each month at each tier.
| Tier | Max rent | Left over/mo |
|---|
Where the 30% rule comes from, and why it's a starting point
The 30%-of-income rule traces back to federal housing assistance guidelines from the 1980s, not a universal law of budgeting. It became the default because it's easy to remember and roughly works for a household with typical expenses. It breaks down fastest for people with heavy student loan or car debt, since 30% for rent plus a big minimum debt payment can leave the "needs" bucket badly overloaded even though rent alone looks affordable.
A concrete example
On $4,800 a month gross income with no other debt, the standard tier puts max rent at $1,440. Add a $450 monthly car payment and $200 in student loan minimums, and that same $1,440 rent now leaves a much smaller true cushion once those fixed payments are accounted for, which is why the calculator above subtracts other debt from the leftover column instead of just showing the rent ceiling in isolation.
Conservative vs stretch: which tier to actually target
The 25% conservative tier is the right target if you're also aggressively saving, paying off debt, or living in a market where rent isn't the only major cost pressure. The 35% stretch tier is common in high cost of living cities where a 30% apartment simply doesn't exist in a reasonable commute radius, but it should come with a plan: less room for the unexpected, and a stronger case for a larger emergency fund.
This calculator gives general guidelines based on the numbers you enter, not a lending or credit decision. This article is for general informational purposes and isn't financial advice.