How Long to Pay Off a Credit Card at the Minimum Payment
At a fixed payment the month count is -ln(1 - rB/P) / ln(1 + r); a credit card minimum is usually a percentage of the balance, which is what stretches the payoff.
The Ledger
Guides.
One formula at a time: how the numbers behind money, property and trade work actually get calculated, with a free calculator in every guide.
Sales Commission Structure: Paying on Margin Instead of Revenue
A margin-based sales commission structure lets the job's net margin pick the rate: on the Commission Ladder's seeded $10,000 job at 28.0% net margin that is $700, not the $1,500 a flat 15% of revenue would have paid.
Emergency Fund Calculator: How Many Months of Runway You Have
An emergency fund calculator divides the money you can reach today by one bare-bones month — on the tested seed figures, $6,000 against $3,850 is 1.56 months, or 47 days of runway.
SOP Template: What Goes In One, and How Many You Can Keep Current
An SOP template needs eight sections, but the number that decides whether the library survives is the review load it signs you up for - and the workbook's seed register prices it at 124 reviews, 72.33 hours and $3,038 a year.
Biweekly Budget Template: Why Half Your Monthly Bills Is the Wrong Number
Hold back your annual bills divided by 26 from each paycheck, not your monthly bills divided by 2 — on $2,540 of monthly bills that is $1,172.31 instead of $1,270.
Break-Even Point Formula: How Many Jobs a Month Clears the Nut
Break-even point = fixed costs divided by contribution per unit; on the workbook's seed figures a $4,780 monthly nut and $540 of contribution per job break even at 7.77 jobs a month.
Plan de negocios: ejemplo con números reales
Un ejemplo útil de plan de negocios es la sección financiera resuelta: con las cifras verificadas del modelo, el equilibrio cae en 7.77 trabajos al mes sobre un gasto de $4,780.
Markup vs Margin: Why a 40% Markup Is Only a 28.6% Margin
A 40% markup on a $753.49 landed cost prices the item at $1,054.88 and keeps $301.39 - a 28.6% margin, not 40%; a 30% margin needs a 42.9% markup.
Cap rate explained, with a worked example
Cap rate is net operating income divided by the purchase price - no mortgage, no depreciation - which is why a 6.2% cap rate can still lose $32.48 a month.
What Is a Good DSCR for a Rental Property?
DSCR is net operating income divided by annual debt service; 1.0 is break-even, one federal program requires 1.15, and the seeded deal in our analyzer lands at 0.97.