Boston Private: Long-Term Value Creation

1. Boston Private:Long-Term Value Creation Q2 2007 Timothy L. Vaill Chairman and Chief Executive Officer Walter M. Pressey President and Interim Chief Financial Officer

2. Forward Looking Statements Statements in this presentation that are not historical facts are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties. These factors include, among others, strategic growth rates, the strength of the company's business, the quality of the company’s loan portfolio, changes in the interest rate environment, adverse conditions in the capital markets and the impact of such conditions on Boston Private’s asset management activities, competitive pressures from other financial institutions, the risk that goodwill and intangibles recorded in the Company’s financial statements will become impaired, and risks related to the identification and implementation of acquisitions, as well as the other risks and uncertainties detailed in Boston Private's Annual Report on Form 10-K and other filings submitted to the Securities and Exchange Commission. Boston Private does not undertake any obligation to update any forward-looking statement to reflect circumstances or events that occur after the date the forward-looking statements are made.

3. Agenda • Overview • Strategy • Results • Future Conclusion

4. Overview Boston Private Today

5. Boston Private’s Mission: To provide wealth management solutions to successful people, their families, private companies and selected institutions through trusted relationships that help preserve, grow and transfer assets over the client’s financial lifecycle.

6. Corporate Profile Balances Geography AUM/advisory: $34 billion Bank assets: $5.6 billion Loans: $4.5 billion Deposits: $4.1 billion • Six regions • 14 affiliates • 45 offices • 1,039 employees People Economics • Annualized Revenues: $368 million • Annualized Net income: $52 million • Q1 2007 EPS: GAAP – $0.34 • Cash – $0.44 • Market cap: $1 billion • Experienced team in the field • Shared values and culture • Key Driver: client service * Geography includes Charter. Economics and Balances exclude Charter.

7. Wealth Management Members Private Banking Wealth Advisory Investment Management

8. Recent Events • On March 5, 2007, Boston Private announced the acquisition of Charter Bank in Bellevue, Washington • Charter is a $320 million commercial bank with 4 locations in key demographic areas • Charter will work closely with Coldstream Capital Management to bring comprehensive wealth management services to the HNW and small business markets

9. Recent Events (con’t) • Charter had double-digit growth over last 5 years in loans deposit and net income 38% 18% 16% • Entire management team has been retained • The transaction will close in the third quarter

10. National Association of Corporate Directors Board of the Year Award • 30-year old national organization • Inaugural NACD Board of the Year Award • Honoring excellence across the Board • Outstanding contributions to the Company • Maintaining high levels of professional standards

11. Primary Focus: High Net Worth Market Preserve, grow and transfer assets. . . Tax Strategies Financial Planning Philanthropy Jumbo Mortgages Estate Planning Business Loans Investment Management Private Banking Trust Services . . . and create a unique “customer experience”

12. Corporate Leadership Team Extensive experience across business disciplines

13. Strategy Capitalizing on a Unique Business Model

14. Boston Private’s Strategic Vision: To build a national wealth management franchise that is broadly recognized ― particularly among the newly affluent--as the preferred place to have financial assets managed, and to generate an above average total return to our shareholders over the long-term

15. How are we different? Enabled by Guided by Targeted Market Research Foundation of HC Support Strategic Acquisitions Capital Stewardship UniqueBusinessModel Sustainable Organic Growth In - Market Business Expansion Diversification Focus Adding Distribution Channels Balanced Affiliate Management

16. $75B $45B Targeted Market Research Focus on HNW demographic and private companies HNW Investable Assetsand Related Fee Income Percent of Millionaires Who Own Private Companies 8.4% Annually Source: CapGemini; World Wealth Report 2005. Source: VIP Forum

17. Strategic Acquisitions Follow intellectual and investment capital Intellectual Capital Investment Capital Business Formation Wealth Accumulation Infrastructure Support Attractive Regions For Acquisitions

18. In - Market Business Expansion Fund expansion and growth in numerous ways • Local tie-in acquisitions • Encino, Kanon Bloch Carre, CH&P • Experienced team lift-outs with clients and AUM • New office development • Beverly, Hingham, Lexington, Los Altos, Naples, New York • Aggressive marketing and sales programs • Advertising campaigns, sales training

19. Small platform, high-touch environments Firms embedded in local communities Centers-of-influence Adding Distribution Channels Diversify and expand business growth via sales/delivery systems Local National PrivateBanking Wealth Advisory InvestmentManagement • National intermediaries • Broker/Dealers • Institutional consultants • Managed accounts • Sub-advisory and SMA

20. Foundation of Support Value added by the holding company • Financial Strength • Access to public capital • Co-investing for business growth • Consolidated balance sheet • Liquidity for principals • Intellectual Capital • Market research • Strategic advice and counsel • Legal, compliance, HR • Leadership/succession planning • Communications Network • Exchange of best practices • Professional forums • Internet/Intranet development • Entrepreneurial Culture • Consultative advisor • Safety net enables risk taking • Support autonomy

21. Capital Stewardship Efficient cash management and capital deployment External Capital Capital Generators Capital Users Holding Company Dividends to Shareholders

22. Diversification Focus Enables sustainable & non-volatile returns Banking Activity Revenue By Business Type AUM By Client Type DEPOSITS $4.1B Wealth Advisory:8% Corporate: 3% Sub-Advisory:14% Foundations & Endowments:11% NOW: 9% CDs: 23% High NetWorth: 49% InvestmentManagement:42% Private Banking:50% ERISA /Public:23% DDAs: 18% MMDA: 50% Revenue By Geography AUM By Investment Style LOANS $4.5B Consumer &Home Equity: 6% S. California: 8% Commercial: 58% New England: 53% Balanced: 14% Equity (Value): 31% Florida: 15% Alternative: 8% Residential Mortgage: 36% Fixed Income: 7% Equity (Growth): 40% New York: 8% N. California: 16%

23. Balanced Affiliate Management Autonomy with strong governance Holding Company Affiliate Partners Oversight Independence Governance Compliance Capital Market / Clients Employees Operations

24. Results UniqueBusinessModel Overall Business Growth Sustainable Organic Growth

25. Overall Revenue Growth $344.9 $263.3 10 Year CAGR 25% $196.8 $133.6 $116.0 $105.4 $82.5 $66.3 $53.2 $30.4 $45.1 $36.6 Q1 07 Total Revenues: $92 million

26. Overall AUM Growth $29.8 $21.3B $19.3B 10 Year CAGR 46% $11.0B $6.5B $6.4B $5.7B $3.7B $2.6B $2.2B $0.7B Q1 07 Total AUM: $34 billion

27. Overall Loan and Deposit Growth* 10 Year CAGR 36% 10 Year CAGR 35% $4.3B $4.1B $209M $206M * Includes Acquisitions Q1 07 Total Loans and Deposits: $4.5 and $4.1 billion

28. Overall Net Income Growth 10 Year CAGR 23% Q1 07 Net Income: $13.1 million

29. Overall Earnings Per Share Growth $1.82 10 Year CAGR 16% Cash Basis 10 Year CAGR 15% GAAP Basis Cash Basis Q1 07 Cash and GAAP EPS: $0.44 and $0.34

30. Sustainable Organic Growth Organic Growth After 3 Years Ownership by Boston Private Note: Based on Revenues

31. Sustainable Organic Growth 5 Year Organic Growth Record in New England Organic Growth at AffiliatesSince Acquisition Westfield AUM: +686% Borel Net Income: +103% Boston Private Bank Assets: +2,860% No acquisitions during this time

32. Executive Retention Rates Retention Rates Since Acquisition * Absent normal retirements or forced terminations

33. Dividends Paid to Shareholders 6 Year CAGR 18% Commenced Dividend in 2000

34. PERFORMANCE INDICATORS MANAGEMENT FOCUS Personnel: Succession, Governance Long Term EPS Growth Existing Markets Growth Opportunities: Products, Distribution Margins RESULT Industry Dynamics: Growth, Regulatory Environment, Demographic Changes Total Return to Shareholders Return on Invested Capital Competitive Market Strategic Plan & Execution Cost of Capital Financial: Capital Ratios, Cash, Debt Coverage, etc. Sustainable Growth Metrics

35. Long-Term Value Creation BPFH Total Return To Investors (12/1995 – 12/2006)

36. Future Steps to additional Value Creation

37. 1. Enhance Existing Platform • Co-invest with affiliates in marketing / sales to generate organic growth • Execute on in-market business growth opportunities • Fill out core capabilities in existing clusters

38. 2. Build-Out Wealth Management Franchise Be located in 15 of top 30 newly-affluent geographic regions Asian Theater? European Theater? Existing location Potential location

39. 3. Expand Product & Distribution Build broad-scale access to products and national distribution • Provide affiliates access to “best of breed” in all investment categories • Private banking, family office and philanthropic services nationwide • National platform – broad scale distribution of proprietary products • More products through existing distribution channels

40. Members of Boston Private Wealth Management Group 4. Employ a Distinctive Brand Strategy Endorsement model unifies and distinguishes local brands Enduring Excellence

41. 5. Attract and Retain Top Talent • Foster culture of values, opportunity and respect • Communicate with clarity and consistency • Emphasize the complete person = skills + cultural fit • Provide creative compensation programs • Actively endorse entrepreneurship

42. Conclusion Boston Private is creating long-term value for shareholders • Unique and validated business model • Demonstrated acquisition success and organic growth • Financial sustainability through diversification • Uncompromising commitment to entrepreneurial environment which attracts and retains superior professionals • Attractive total returns to shareholders over ten-year period

43. Boston Private:Long-Term Value Creation Q2 2007 Timothy L. Vaill Chairman and Chief Executive Officer

44. Appendix • Financial Performance • EPS • Revenue • Expenses • Segment Financial Summary • Private Banking • Wealth Advisory • Investment Management • Capital Management

45. Growth Consistent long term EPS growth $1.82 5 Year CAGR Cash Earnings 13% $1.70 5 Year CAGR GAAP Earnings 12% $1.37 $1.09 $1.04 $0.98 $0.44 $0.34

46. Operating Revenue Dramatic revenue increases 5 Year CAGR 27% ($ Millions)

47. Operating Expenses Affiliates increasing in size and investing in future growth ($ Millions)

48. Private Banking * Total and Percentage of Revenue exclude Charter.

49. Private Banking Results Robust loan growth with heightened competition for deposits Deposits ($M) 5 year deposit CAGR: 29% Acquisitions $3,748 $4,078 $4,101 Consolidated $2,386 $1,658 $1,400 $1,145 2001 2002 2003 2004 2005 2006 Q1 2007 Loan Growth ($M) • 5 year loans CAGR: 31% • Credit quality remains pristinewith non-performing at 0.21%

50. Core Net Interest Income and Margin Net interest margin experienced pressure in Q1 ‘07 3.76%