Mutual Fund Summary Prospectus (497k)

Summary Prospectus 2012

BMO Tax-Free Money Market Fund


Class I MFIXX		Class Y MTFXX		As of December 28, 2012

Before you invest, you may want to review the Fund’s Prospectus, which contains information about the Fund and its risks. You can find the Fund’s Prospectus and other information about the Fund online at www.bmofundsus.com. You can also get this information at no cost by calling 1-800-236-FUND (3863), by sending an email request to bmofundsus.services@bmo.com, or by asking your broker/dealer, investment professional, or financial institution. The Fund’s Prospectus and Statement of Additional Information, both dated December 28, 2012, are incorporated by reference into this Summary Prospectus.

Investment Objective:

To provide current income exempt from federal income tax consistent with stability of principal.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.


Shareholder Fees (fees paid directly from your investment)	Class Y		Class I
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	None		None
Redemption Fee (as a percentage of amount redeemed, for shares held less than 30 days)	None		None
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees	0.20%		0.20%
Distribution (12b-1) Fees	None		None
Other Expenses	0.34%		0.09%
Acquired Fund Fees and Expenses ⁽¹⁾	0.01%		0.01%
Total Annual Fund Operating Expenses	0.55%		0.30%
Fee Waiver and Expense Reimbursement ⁽²⁾	(0.09%	)	(0.09%	)
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement ⁽²⁾	0.46%		0.21%

(1)

Acquired Fund Fees and Expenses represent the pro rata expense indirectly incurred by the Fund as a result of its investment in other investment companies. Total Annual Fund Operating Expenses shown will not correlate to the Fund’s ratios of expenses to average net assets appearing in the Financial Highlights tables, which do not include Acquired Fund Fees and Expenses.

(2)

BMO Asset Management Corp. (Adviser) has agreed to waive or reduce its investment advisory fee and reimburse expenses to the extent necessary to prevent class total annual operating expenses (excluding interest, taxes, brokerage commissions, other investment-related costs, and extraordinary expenses, such as litigation and other expenses not incurred in the ordinary course of the Fund’s business, and Acquired Fund Fees and Expenses) from exceeding 0.45% for Class Y and 0.20% for Class I through December 31, 2013. The Adviser may not terminate this arrangement prior to December 31, 2013 unless the investment advisory agreement is terminated.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return

each year and that the Fund’s operating expenses are as shown in the table and remain the same. The costs in the one-year example and for the first year of the three-, five-, and ten-year examples reflect the Adviser’s agreement to waive fees and reimburse expenses through December 31, 2013. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:


		Class Y		Class I
1 Year	$	47	$	22
3 Years	$	167	$	87
5 Years	$	298	$	160
10 Years	$	681	$	372

Principal Investment Strategies

The Fund invests primarily in fixed and floating rate municipal bonds and notes, variable rate demand instruments, and other high-quality, short-term tax-exempt obligations maturing in 397 days or less. Under normal circumstances, the Fund invests its assets so that at least 80% of the annual interest income that the Fund distributes will be exempt from federal income tax, including federal alternative minimum tax (AMT).

To maintain principal preservation, the Adviser places a strict emphasis on credit research. Using fundamental analysis, the Adviser develops an approved list of issuers and securities that meet the Adviser’s standards for minimal credit risk. The Adviser continually monitors the credit risks of all of the Fund’s portfolio securities on an ongoing basis by reviewing financial data and ratings of nationally recognized statistical rating organizations (NRSROs). The securities in which the Fund invests must be rated in one of the two highest short-term rating categories by one or more NRSROs or be determined by the Adviser to be of comparable quality to securities having such ratings (except that U.S. Government securities and shares of other registered money market funds are not subject to this requirement). The Fund invests in compliance with industry-standard regulatory requirements for money market funds for the quality, maturity, diversification, and liquidity of investments.

The Fund seeks to enhance yield by taking advantage of favorable changes in interest rates and reducing the effect of unfavorable changes in interest rates. In seeking to achieve this objective, the Adviser targets a dollar-weighted average portfolio maturity of 60 days or less based on its interest rate outlook. The interest rate outlook is developed by analyzing a variety of factors, such as current and expected U.S. economic growth, current and expected interest rates and inflation, and the Federal Reserve Board’s monetary policy. By developing an interest rate outlook and adjusting the portfolio’s maturity accordingly, the Adviser seeks to position the Fund to take advantage of yield enhancing opportunities.

www.bmofundsus.com

Summary Prospectus 2012

BMO Tax-Free Money Market Fund


Class I MFIXX		Class Y MTFXX		As of December 28, 2012

Principal Risks

An investment in the Fund is not a deposit of BMO Harris Bank N.A., or any of its affiliates, and is not insured or guaranteed by the FDIC or any other government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. In addition, the Fund is subject to the following risks.

Interest Rate Risks. Prices of fixed income securities rise and fall in response to changes in the interest rate paid by similar securities. Generally, when interest rates rise, prices of fixed income securities fall. Interest rate changes have a greater effect on the price of fixed income securities with longer maturities.

Credit Risks. Credit risk is the possibility that an issuer will default on a security by failing to pay interest or principal when due. If an issuer defaults, the Fund may lose money. Lower credit ratings correspond to higher credit risk.

Call Risks. If the securities in which the Fund invests are redeemed by the issuer before maturity (or “called”), the Fund may have to reinvest the proceeds in securities that pay a lower interest rate, which may decrease the Fund’s yield. This will most likely happen when interest rates are declining.

Liquidity Risks. Liquidity risk refers to the possibility that the Fund may not be able to sell or buy a security or close out an investment contract at a favorable price or time. Consequently, the Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on the Fund’s performance. Infrequent trading of securities also may lead to an increase in their price volatility. Additionally, significant redemptions by large investors in the Fund could have a material adverse effect on the Fund’s other shareholders and the net asset value could be affected by forced selling during periods of high redemption pressures and/or illiquid markets.

Municipal Securities Risks. Municipal bonds are subject to risks based on many factors, including economic and regulatory developments, changes or proposed changes in the federal and state tax structure, deregulation, court rulings, and other factors. The value of municipal securities may be affected more by supply and demand factors or the creditworthiness of the issuer than by market interest rates. Repayment of municipal securities depends on the ability of the issuer or project backing such securities to generate taxes or revenues. There is a risk that the interest on an otherwise tax-exempt municipal security may be subject to federal income tax.

Management Risks. The Adviser’s judgments about the attractiveness, value, and potential appreciation of the Fund’s investments may prove to be incorrect. Accordingly, no guarantee exists that the investment techniques used by the Fund’s manager will produce the desired results.

Sector Risks. The Fund may invest its assets in municipal securities that finance similar projects, such as those relating to education, health care, transportation, and utilities. To the extent the Fund invests its assets in a particular sector, the Fund’s performance may be more susceptible to any economic, business, or other developments that generally affect that sector.

Investments in Other Investment Companies Risks. The Fund may invest in securities issued by other investment companies. By investing in another investment company, there is a risk that the value of the underlying securities of the investment company may decrease. The Fund will also bear its proportionate share of the other investment company’s fees and expenses.

Fund Performance

The bar chart and table show the historical performance of the Fund’s shares and provide some indication of the risks of investing in the Fund. The bar chart shows how the Fund’s total returns have varied from year to year, while the table compares the Fund’s average annual total returns to the returns of an average of money funds with similar objectives and an index of funds with similar investment objectives. Please keep in mind that past performance does not represent how the Fund will perform in the future. Investors may obtain the Fund’s current 7-Day Net Yield or updated performance information at www.bmofundsus.com.

Class Y—Annual Total Returns (calendar years 2005-2011)

The return for the Class Y shares of the Fund from January 1, 2012 through September 30, 2012 was 0.03%.

During the periods shown in the bar chart for the Fund:


	Quarter Ended		Returns
Best quarter		9/30/2007		0.85	%
Worst quarter		9/30/2011		0.01	%

7-Day Net Yield as of December 31, 2011 was 0.12%.

www.bmofundsus.com | p. 2

Summary Prospectus 2012

BMO Tax-Free Money Market Fund


Class I MFIXX		Class Y MTFXX		As of December 28, 2012

Average Annual Total Returns through 12/31/11


	1 Year			5 Year			Since Inception
Class Y (Inception 9/22/04)		0.05	%		1.31	%		1.66	%
Class I (Inception 6/29/05)		0.29	%		1.56	%		1.92	%
IMNTFNR (reflects deduction of fees and no deduction for sales charges or taxes)		0.02	%		1.02	%		1.39	%
LTEMMFI (reflects deduction of fees and no deduction for sales charges or taxes)		0.02	%		1.02	%		1.41	%

The iMoneyNet Money Fund Report /Tax-Free National Retail Index (IMNTFNR) is an average of money funds with investment objectives similar to that of the Fund.

The Lipper Tax Exempt Money Market Funds Index (LTEMMFI) is an average of the 30 largest mutual funds in this Lipper category.

Management of the Fund

Adviser. BMO Asset Management Corp.

Portfolio Manager. Craig J. Mauermann, a Managing Director and a Portfolio Manager of the Adviser, joined the Adviser in 2004 and has managed the Fund since its inception in 2004.

Purchase and Sale of Fund Shares

Minimums. To open an account, your first investment must be at least $1,000 for Class Y shares and $10 million for Class I shares. For Class Y, the minimum subsequent purchase amount is $50.

You may sell (redeem) your shares of the Fund on any day the Federal Reserve Bank of New York is open for business and, alternatively, on any day the U.S. government securities markets are open and the Fund’s portfolio manager determines sufficient liquidity exists in those markets in one of the following methods, depending on the elections you made in your account application:

Phone. Call 1-800-236-FUND (3863).

Wire/Electronic Transfer. Upon written request sent to the address below under “Mail,” redemption proceeds can be directly deposited by Electronic Funds Transfer or wired to your previously designated domestic commercial bank.

Mail. Send a written request, indicating your name, the Fund name, your account number, and the number of shares or the dollar amount you want to redeem, to: BMO Funds U.S. Services, P.O. Box 55931, Boston, MA 02205-5931.

Systematic Withdrawal Program. If your account balance is at least $10,000, you may have predetermined amounts of at least $100 withdrawn from your account on a monthly or quarterly basis.

BMO Funds Website. Go to www.bmofundsus.com.

Checkwriting. Write a check in an amount of at least $250.

Tax Information

The Fund intends to distribute income exempt from federal income tax; however, a portion of the Fund’s distributions may be subject to federal income tax.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

www.bmofundsus.com | p. 3

Summary Prospectus 2012

BMO Tax-Free Money Market Fund