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Accounting Firm

Lanphier LLP

Denver CPA firm specialising in tax, accounting and advisory for small businesses and individuals

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About Lanphier LLP

Tax preparation and advisory for small business owners

A CPA practice in Denver, Colorado, Lanphier LLP mixes tax, accounting and advisory services for businesses and families. The firm says its advice has big-firm depth while its relationships stay as close as a small practice's. Its small business work is built around the idea that owners do not usually have a tax director or chief financial officer in-house, so they rely on their advisers to show them what they do not know. The firm describes its annual advisory service as a holistic approach that runs through the year rather than only at filing time.

Outside finance leadership for mid-sized companies

For mid-sized businesses the firm offers CFO and tax director support, either as a full service or alongside a company's larger audit or tax firm. The stated purpose is to reduce costs and ease pressure on internal finance teams, so that the company can run more efficiently.

International tax and IRS controversy

Specialist work in international tax and IRS controversy is one of the firm's main areas. It takes on this work for small businesses and individuals, and it accepts referrals in areas that many practitioners avoid, working with referral partners on the basis that the relationship should benefit everyone involved.

Bookkeeping through to financial statements

The accounting service runs from full-service bookkeeping to the preparation of financial statements. Tax preparation and consulting are offered for both individuals and businesses, and the planning work is aimed at helping a business grow while managing its tax outcome.

Accounting and legal work under one roof

Legal services are offered through a separate law practice, Lanphier's legal firm, which operates under the same roof as the accounting business. The firm presents this as a way for clients to deal with accounting and legal questions through one set of advisers who already know their finances.

Tax planning for individuals and families

Individual tax planning is part of the offer, with the firm's process designed to help people make decisions that match their personal goals and priorities and to prepare them for tax season. The firm says its aim is to give clients confidence about their tax position and fewer headaches throughout the year.

Clients working across US borders

Its clients are owners of small firms, mid-sized companies, families and private individuals, including people whose activity runs both inside and outside the United States. It says its specialist knowledge is what suits clients with cross-border affairs or complex concerns that smaller firms may not handle.

TrustList summary

Lanphier LLP is a certified public accounting firm in Denver, Colorado. It combines tax, accounting and advisory work, and pairs the depth of a large firm with the closer relationships of a small one. International tax and IRS disputes are among its stated specialities.

What Lanphier LLP does

  • Tax preparation and consulting: services for individuals and businesses.
  • Bookkeeping and financial statements: full-service record keeping through to statement preparation.
  • Tax advisory and planning: strategy aimed at helping a business grow and reduce its tax outcome.
  • CFO and tax director support: outside finance leadership for mid-sized companies.
  • International tax and IRS controversy: specialist work it also takes on by referral from other practitioners.
  • Legal services: offered through a separate law practice under the same roof.

Who it works with

Small business owners, mid-sized companies, families and individuals, including those with activity inside and outside the United States.

Key facts

  • Based in: Denver, Colorado
  • Community: small business partner of the Denver Broncos

Summary written by TrustList from the business's own published information, Nov 2026.

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