Auction Tiered Buyer Premium Calculator
Apply caller-supplied progressive buyer-premium bands to an auction hammer price and add explicit charges; tax treatment remains outside the calculation.
Description
A tiered auction premium applies each rate only to its corresponding portion of hammer price.
A tiered auction premium applies each rate only to its corresponding portion of hammer price. Added charges are separate from that premium.1
Apply caller-supplied progressive buyer-premium bands to an auction hammer price and add explicit charges; tax treatment remains outside the calculation.
When to use Auction Tiered Buyer Premium Calculator
Use this tool to apply caller-supplied progressive buyer-premium bands to an auction hammer price and add explicit charges; tax treatment remains outside the calculation.
Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.
How to use Auction Tiered Buyer Premium Calculator and understand its results
- Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.
- Enter additionalCharges, hammerPrice, tiers using the field table and calculation rules, then run the tool.
- Read appliedTierCount, buyersPremium, subtotalBeforeTax, totalBeforeTax. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| additionalCharges | Additional charges before tax | number; minimum: 0 | Required |
| hammerPrice | Auction hammer price | number; minimum: 0 | Required |
| tiers | Rows are [from amount, to amount, rate percent]; use zero as the to amount only for the final unbounded tier. | list of list of number | Required |
Enter nonnegative hammer/charges and nonempty [from,to,rate%] rows. Start at zero, require contiguous ordered bounds and nonnegative rates; zero upper bound denotes an unbounded final tier. Return applied-tier count, premium and before-tax subtotals.
premium=ΣcoveredTierAmount×rate/100; total=hammer+premium+charges Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| appliedTierCount | Applied tier count | integer; minimum: 0 |
| buyersPremium | Calculated buyer's premium | number; minimum: 0 |
| subtotalBeforeTax | Hammer plus premium before tax | number; minimum: 0 |
| totalBeforeTax | Total before tax | number; minimum: 0 |
{
"input": {
"additionalCharges": 500,
"hammerPrice": 100000,
"tiers": [
[
0,
10000,
25
],
[
10000,
0,
20
]
]
},
"output": {
"appliedTierCount": 2,
"buyersPremium": 20500,
"subtotalBeforeTax": 120500,
"totalBeforeTax": 121000
}
}Limitations and assumptions
A finite final tier does not charge any amount above its endpoint. No tax, live auction schedule or currency conversion is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Matrices are limited to 128 rows and 128 entries per row; other lists are limited to 100,000 entries. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Box Papers Accessory Value Ratio Screen: Screen the value difference assigned to a box and papers against a caller-defined percentage limit without claiming a universal collector premium. For a complementary task, use Case Refinishing Removal Budget Calculator: Allocate a caller-defined case-thickness removal budget across polishing passes without claiming a guaranteed microns-removed rate.
References
-
Auction Tiered Buyer Premium Calculator — tool.io
Similar or alternative tools
- Box Papers Accessory Value Ratio Screen
Screen the value difference assigned to a box and papers against a caller-defined percentage limit without claiming a universal collector premium.
- Case Refinishing Removal Budget Calculator
Allocate a caller-defined case-thickness removal budget across polishing passes without claiming a guaranteed microns-removed rate.