Payment & Billing Policy
1. Currency and published ranges
Prices shown on the website are stated in United States dollars. The ranges describe typical starting scopes rather than a promise to deliver any requested interface for a fixed amount. A project with a different screen count, complexity, review process or documentation requirement may need a different written quote.
The published service ranges are $300–$700 for wireframe planning, $600–$1,500 for interface design, $250–$600 for a navigation and journey review, $400–$1,000 for a prototype and $350–$900 for documentation. A combined engagement should identify the combined deliverables and fee rather than leaving overlap or exclusions unclear.
2. What a proposal should identify
Before paid work is authorized, the proposal should set out the service scope, fee structure, included review rounds, deliverable formats and relevant assumptions. It should identify whether a fee is fixed for a defined scope, divided into milestones or calculated through another agreed method. An hourly rate applies only if it has been stated and accepted.
If a proposal has an acceptance deadline or depends on a particular starting date, that condition should be stated in the proposal. The website itself does not establish an expiration period, reserve capacity or automatically renew a quote. Material uncertainties should be clarified before either party relies on the estimate.
3. Deposits and milestone payments
A project may use an initial payment or milestone schedule when expressly agreed. The amount, due date and work associated with each payment must be identified in the accepted documents. No standard deposit percentage is imposed by this website, and an inquiry is not a payment authorization.
Where a start is conditional on payment and client materials, the parties should confirm when both conditions have been met. A payment milestone should not be described as approval of unrelated work or an automatic transfer of every intellectual property right. Those matters are governed by the relevant project terms.
4. Payment methods and invoices
Available payment methods are specified in the proposal or invoice. We do not represent that a particular card network, bank transfer method, wallet or financing service is available unless it is actually offered for the engagement. Payment instructions should come through a verified business communication associated with your project.
The website inquiry form does not collect card numbers, bank credentials or payment authorization. Do not put financial account details into the project description or assistant. If payment instructions appear to change unexpectedly, verify them using an independently established contact method before acting.
5. Taxes and other charges
If a tax is legally chargeable on the particular transaction, it should be identified in the applicable quote or invoice. Tax treatment can depend on the specific service and transaction circumstances. The website does not present all design services as categorically taxable or categorically exempt.
Bank charges, currency conversion, platform fees or other incidental costs are not silently added as a general website charge. Any cost charged by us must be supported by the agreement or applicable law. A provider used by the client may impose its own charges, which should be reviewed with that provider.
6. Third-party assets and tools
A project may require a licensed font, stock image, paid component library, collaboration service or other third-party resource. Any purchase or recurring cost expected to be borne by the client should be identified and approved before it is incurred on the client's behalf.
The proposal should clarify who purchases and holds the license, which uses are permitted and whether future renewal or implementation costs exist. Delivery of a design containing a third-party asset does not eliminate the asset owner's license requirements or make an unpurchased license part of a general service fee.
7. Additional work and scope changes
If requested work falls outside the accepted scope, we should explain the proposed addition and its price and timing effect before performing chargeable additional work. Examples can include new pages, new user flows, additional device layouts, extra review rounds or a materially different design direction.
Feedback that refines an agreed deliverable should be evaluated against the proposal rather than automatically billed as a new project. A written change record helps both parties distinguish included refinements from authorized additions. Silence or an informal exploratory conversation is not used as blanket approval for undefined fees.
8. Invoice review and questions
Please review invoices against the accepted scope, milestone descriptions and any approved changes. If an item appears incorrect, identify the invoice, disputed line and reason for the question as soon as practical. Providing a clear record helps resolve mistakes without requiring speculation about what was authorized.
We can review the relevant proposal, change approvals, work records and payments received. An adjustment, if warranted, should be documented so that both parties have the same balance. Raising a question does not authorize fraudulent payment reversal, and this policy does not remove lawful rights concerning a genuine billing dispute.
9. Late or interrupted payment
Due dates are the dates agreed in the proposal or stated on an applicable invoice. A late fee, interest charge, collection cost or payment penalty applies only if it is lawfully agreed and enforceable; this policy does not introduce an undisclosed rate or charge.
If an authorized payment is overdue, the parties should communicate about its effect on scheduled work and access to deliverables. Suspension or rescheduling should follow the agreement and applicable law, with relevant notice. Any cure period, restart cost or other consequence must not be invented after the fact.
10. Cancellation and refund accounting
When work ends early, the accounting should distinguish authorized services performed, approved non-cancellable commitments, payments received and amounts covering unperformed work. The Cancellation & Refund Policy and individual agreement explain how those items are considered.
An initial payment is not described here as automatically forfeited in every circumstance. Whether an amount is retained or returned depends on the agreement, the work and costs properly chargeable, and applicable law. We should provide a reasonable explanation of the calculation when a refund or final balance is determined.
11. Records and payment confirmations
A successful website inquiry confirmation concerns the submission of a request. It is not an invoice, a payment receipt or confirmation that funds have been transferred. A browser-generated request reference helps identify the inquiry but is not a processor transaction identifier.
Keep the accepted proposal, invoices, payment records and written changes for your own business records. If a payment record is missing or appears inconsistent, contact us with the relevant reference and limited details needed to investigate. Do not send full card or bank credentials as evidence.
12. Controlling terms and contact
Specific billing provisions in an accepted project agreement control where they validly differ from these general explanations. Mandatory rights and restrictions remain applicable. A future website update does not by itself change the payment terms of work already authorized.
Questions about a proposed fee, invoice, expense or payment instruction should be directed to Parkhurst Interface using the details below or the on-site inquiry form. Include the project or invoice reference where available so the issue can be connected to the appropriate records.
Contact Parkhurst Interface
EMAIL: projects@parkhurstinterface.com
ADDRESS: 6601 Westown Pkwy, West Des Moines, IA 50266
PHONE: +1 (641) 500-7004