Tarifbolt
A contractor review workspace that maps bill-of-quantities lines to sourced material categories, compares versioned public indexes and authorized quotes, models bounded deltas, and drafts a human-reviewed change package with provenance and uncertainty.
Material tariffs and price volatility can make an accepted bid diverge from later procurement cost, but no national index is the current delivered price for a specific product, location, quantity, supplier, tax, freight, lead time, or contract. The supplied research confirms several public economic and tariff sources plus a paid metals data service, while no reviewed SMB direct peer combines BOQ mapping and evidence assembly.
Tarifbolt parses an authorized BOQ, preserves original lines, and proposes mappings to material categories and source series. A reviewer confirms specification, unit, quantity, geography, quote date, contract baseline, escalation clause, exclusions, and source suitability. The system produces scenarios and sensitivities, not a revised price that “should” be charged. Supplier quotes and actual invoices remain stronger transaction evidence than generic indexes.
A change-order draft is a proposal subject to the contract and qualified review. Signed provenance may help show which sources and assumptions were used, but it does not prove tariff applicability, contractual entitlement, causation, amount, notice compliance, admissibility, or litigation outcome. Current tariff authorities must be revalidated at use time.
Estimating, procurement, commercial, and project leaders at small and midsize contractors managing material-heavy bids and change discussions.
Recent volatility and tariff signals make the workflow timely but unstable.
Fast repricing helps only if uncertainty and contractual authority remain explicit.
Multiple references and inbound links support the cluster with moderate grounded convergence.
The contractor pain, public data sources, BOQ mechanism, and lack of a reviewed SMB direct peer support a focused scenario tool.
Index-to-line mapping is uncertain, current tariffs and contracts require experts, national data may not match local procurement, and the evidence bundle cannot create entitlement.
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