Before you sign, price, host, or commit
Little Book of Renting
Free calculators and plain-English guides for renters comparing apartment costs.
Run the numbers before you sign a lease, compare apartments, or commit to rental costs.
Featured calculator
Apartment Offer & Move-In Cost Comparison
Compare two apartments by rent, concessions, deposits, broker fees, move-in costs, monthly add-ons, and total lease cost.
Apartment A may have lower total cost, while Apartment B may need less cash upfront.
Calculator categories
The library starts with apartment-offer math and is structured to grow into a broader rental decision reference.
Featured tool
Apartment Offer Comparison Tool
Detailed ledger
Apartment offers
Apartment AOption 1
Apartment BOption 2
The recommendation
Apartment A has the lowest total lease cost
Based on the numbers entered, Apartment A has the lowest total lease cost. Apartment A needs the least upfront cash, and Apartment A has the lowest real monthly cost.
Lowest total cost
Apartment A
$33,581
Lowest upfront cash
Apartment A
$6,225
Offers compared
2
up to 4 offers
Checks before signing
- - This is a calculator, not legal or financial advice. Verify fees, lease terms, and local rules before signing.
- - Apartment A: the free month lowers net effective rent, but your actual monthly payment may still be the full rent.
- - Apartment A: non-refundable fees are a large part of move-in cash.
Offer comparison summary
Apartment A
- Net effective
- $2,246
- Real monthly
- $2,484
- Upfront
- $6,225
- Total lease
- $33,581
Apartment B
- Net effective
- $2,300
- Real monthly
- $2,538
- Upfront
- $7,837
- Total lease
- $35,993
| Offer | Net effective | Real monthly | Upfront cash | Total lease | Broker impact | Labels |
|---|---|---|---|---|---|---|
| Apartment A | $2,246 | $2,484 | $6,225 | $33,581 | $0/mo | Lowest total costLowest move-in cashLowest monthly costConcession-heavy offerFee-heavy offer |
| Apartment B | $2,300 | $2,538 | $7,837 | $35,993 | $276/mo | Broker fee heavyGood rent, expensive move-inFee-heavy offerLower rent but higher true cost |
Renter toolkit
Things renters often compare before move-in
Moving quotes
Estimate movers, supplies, storage, and timing before signing.
Review before committing
Renters insurance
Compare monthly policy estimates and lease requirements.
Review before committing
Latest guides
Plain-English rental math
Renters
How to Compare Apartment Offers Before You Sign
Compare apartments by total lease cost, move-in cash, concessions, deposits, and monthly add-ons before committing.
Rent Math
Net Effective Rent Explained: What 1 Month Free Really Means
Understand net effective rent, free-month concessions, and why the monthly payment may still be higher than the advertised deal.
Fees
Broker Fee vs Free Month: Which Apartment Deal Is Better?
Compare a broker-fee apartment against a free-month concession using total lease cost and move-in cash.
How the book works
One calculator, one clear decision page
Each calculator is paired with plain-English guides, formula documentation, and AI-readable Markdown so people and search assistants can understand the assumptions, examples, limitations, and next steps.
Run the numbers
Start with the calculator for the decision in front of you.
Read the guide
Use the related chapters to understand fees, concessions, and cash timing.
Verify the source terms
Check the lease, fee sheet, local rules, and qualified professionals when needed.
Little Book of Renting is informational only. Calculators use simplified examples and user-provided assumptions. We do not provide legal, financial, tax, housing-rights, real estate, or platform-policy advice.