Live planning model
Build a protected category budget
Enter distinct category amounts, apply one visible reserve, and compare the protected total with funds actually available. Guest-normalized cost is a diagnostic, not a recommendation to treat every category as variable.
| Budget line | Entered or computed amount | Comparison basis | Share or gap |
|---|
Current calculation process
Formula, default substitution, intermediate quantities, and check
B_protected = sum(category costs) x (1 + contingency); gap = max(0, B_protected - available funds)
Every category is non-negative, attending guests are a positive whole count, and contingency is applied once to the entered base. Cost per guest equals protected total divided by attendance.
Five-step budget build
Move from vendor scope to funding decision
- Collect current written proposals and map every required cost into one category without double counting.
- Include taxes, service charges, gratuities, delivery, setup, teardown, overtime, and permits where known.
- Set a contingency for unresolved scope rather than hiding miscellaneous amounts inside major categories.
- Enter only cash and confirmed contributions available by required payment dates.
- Review the funding gap and category shares, then save the current report with contracts and assumptions.
Five budget concepts
What the protected total represents
Category completeness
A total can be mathematically correct and still understate cost when transportation, stationery, alterations, fees, or cleanup are omitted.
Contingency is separate
The reserve is calculated from the whole entered base so its amount and use remain auditable.
Funds are time-bound
A promised contribution arriving after vendor deadlines does not solve near-term cash flow.
Gap is floored at zero
Excess funding is not a negative gap; it remains available cushion.
Per-guest is diagnostic
Venue, attire, and photography can be fixed, so cost per guest does not imply equal savings from each guest removed.
Symbols and default substitution
Reconcile categories, reserve, and funds
| Symbol | Meaning | Default | Unit |
|---|---|---|---|
| C_i | Each entered category | 7 categories | USD |
| B | Category base | sum of C_i | USD |
| c | Contingency | 10% | decimal |
| F | Available funds | 38,000 | USD |
| G | Attending guests | 120 | people |
| P | Protected total | B x 1.10 | USD |
Default substitution: B = 8,500 + 11,200 + 3,200 + 4,800 + 2,600 + 3,900 + 4,300; protected total = B x 1.10; gap = max(0, protected total - 38,000); cost per guest = protected total / 120.
Three planning lenses
Use category pressure to revise scope
Fixed versus guest-driven
Separate costs that move with attendance from fixed commitments before estimating savings from a guest-count change.
Contracted versus provisional
Mark signed commitments and remaining estimates outside this calculator; contingency should not disguise known contract obligations.
Payment calendar
A funded total can still create a cash-flow problem if deposits cluster before savings or contributions arrive.
Two budget cases
Normal and zero-gap outcomes
Vendor proposals in progress
The default couple enters current proposals, preserves a 10% reserve, and uses the gap to decide whether to trim decor, revise attendance, or extend saving before signing.
Funds exceed protected total
When available funds are higher than the protected total, funding gap is zero. The difference is cushion and should not be interpreted as required spending.
Terms
Wedding-budget vocabulary
- Category base
- Sum of all entered cost categories before contingency.
- Contingency
- Visible reserve for unresolved or changing scope.
- Protected total
- Category base plus its contingency amount.
- Funding gap
- Positive amount by which protected cost exceeds funds.
- Available funds
- Cash and confirmed contributions usable for obligations.
- Cost per guest
- Protected total divided by attending guests.
Wedding-budget questions
Frequently asked questions
What should go in the other-cost category?
Use it for real scoped items not represented elsewhere, such as stationery, transport, permits, gifts, insurance, or fees, and keep a note of the components.
Should contingency include known service charges?
No. Known mandatory charges belong in their category. Contingency is for unresolved or changing scope.
Why is funding gap never negative?
Funds above protected cost create cushion, not a negative financing need. The gap is therefore bounded at zero.
Does cost per guest show how much I save by cutting one guest?
Not necessarily. It averages fixed and variable costs. Use vendor pricing to identify the true marginal guest cost.
Can I include family contributions?
Include only amounts and timing that are confirmed enough to use for vendor obligations, and retain the confirmation.
How often should I update the category amounts?
Update after each proposal, contract, guest-count deadline, or scope change so the base and reserve remain current.
Limits and evidence
A category total is only as complete as its contracts
- The calculator does not infer taxes, service fees, gratuities, overtime, or cancellation charges.
- One contingency percentage cannot represent every category’s uncertainty.
- Available funds are not scheduled against deposit due dates.
- Cost per guest mixes fixed and attendance-driven costs.
Evidence record: retain proposals, signed contracts, payment calendar, guest-count basis, contribution confirmations, category notes, and exported report. This is budgeting support, not legal, tax, or financial advice.
Sources and next decisions
Connect the total to cash flow
- CFPB: How to create a budget — goals, resources, and tracking.
- CFPB: Your Money, Your Goals toolkit — spending and cash-flow tools.