Contract Proration Extractor
Calculate prorated contract values for subscriptions, leases, and service agreements. Enter values for instant results with step-by-step formulas.
Formula
Prorated Amount = (Contract Value / Total Period) × Active Period
Proration divides the total contract value by the full period length, then multiplies by the active portion. Method varies by daily, monthly, or standardized 30-day calculations.
Worked Examples
Example 1: SaaS Mid-Cycle Upgrade
Problem:Customer upgrades from $100/mo to $200/mo plan on March 15. Calculate proration for March (31 days).
Solution:Days remaining: 31 - 14 = 17 days\n\nOld plan credit: $100 × (17/31) = $54.84\nNew plan charge: $200 × (17/31) = $109.68\n\nNet charge for March: $109.68 - $54.84 = $54.84\nPlus: Original $100 already charged\n\nTotal March charge: $100 + $54.84 = $154.84
Result:March charge: $154.84 | Upgrade difference prorated: $54.84
Example 2: Annual Contract Early Termination
Problem:Customer cancels $24,000/year contract after 8 months. Calculate refund using daily proration.
Solution:Contract: $24,000 for 365 days\nDaily rate: $24,000 / 365 = $65.75\n\nDays used (8 months ≈ 243 days): 243\nDays remaining: 365 - 243 = 122\n\nAmount used: $65.75 × 243 = $15,977.25\nRefund due: $65.75 × 122 = $8,021.50\n\nOr: $24,000 - $15,977.25 = $8,022.75
Result:Refund: $8,022 | 33% of contract unused
Example 3: Lease Proration
Problem:Tenant moves into $2,400/mo apartment on the 20th. Calculate prorated first month rent.
Solution:Rent: $2,400/month\nMove-in: 20th of month (31 days)\nDays occupied: 31 - 19 = 12 days\n\nDaily rate: $2,400 / 31 = $77.42\nProrated rent: $77.42 × 12 = $929.03\n\nAlternative (30-day month):\nDaily rate: $2,400 / 30 = $80.00\nProrated: $80 × 12 = $960.00
Result:Prorated rent: $929 (actual) or $960 (30-day)
Frequently Asked Questions
What is contract proration?
Contract proration is the process of calculating partial payment or credit based on the portion of a contract period actually used. Common in SaaS subscriptions, leases, and service agreements when starting mid-period, canceling early, or changing service levels.
What proration methods exist?
Common methods: Daily (exact days used), Monthly (full/half months), 30-day month (assumes 30 days regardless of actual), Calendar month (based on calendar dates). Choice depends on contract terms and industry practice.
How do I calculate daily proration?
Daily proration: (Contract Value / Total Days) × Actual Days Used. For a $12,000 annual contract: Daily rate = $12,000 / 365 = $32.88. For 100 days: $32.88 × 100 = $3,288.
When is proration applied?
Proration applies during: Mid-cycle start (new customer), Mid-cycle cancellation (refund/credit), Plan upgrades/downgrades, Contract amendments, Partial month billing, and early termination calculations.